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• Get Your Enterprise Working With Oracle On Track Communication 1.0

  - by Josh Lannin

  The On Track Development team is very pleased to announce that today On Track is available for our customers to download and evaluate.  To learn more about what On Track does start with our whitepaper and datasheet.   If you are a developer, take a look at our documentation and samples posted to our OTN page. For this first blog post, I’ll be speaking to several notable points about our product. Graceful Escalation via Conversations: On Track addresses the “Collaboration Problem” through a single guiding principle – graceful escalation – within the construct of a Conversation. In On Track, collaboration is based on a context (called a “Conversation”) that gracefully escalates in form, structure, and content, as dictated by the particular needs of a given collaboration.  Within that context, On Track provides a rich set of tools to choose from.  These tools provide for communication, coordination, content management, organization, decision making, and analysis -- all essential aspects of collaboration, but not all of them are essential all of the time.  Every collaborative interaction will evolve differently.  Some will evolve to represent work spreading over the course of years and involving a large, distributed team, while others may involve few people and not evolve at all.  Regardless, all collaborative contexts are built from the same parts, utilize the same concepts, and start the same way.  The principle of graceful escalation is that you only use the tools and structure you need; so you only incur the complexity you need. Purposeful Collaboration: Through application integration, On Track Conversations bring enterprise application users the communication and collaboration capabilities required to complete business process.  By association with specific processes or business objects conversations extend the possible interactions and broaden participation to internal or external non-application users and provide a sophisticated interaction experience, all the while enhancing the data set within the owning application.  Purposeful collaboration not only needs to happen in the context of applications, it must support a full range of real-time and long-running interactions to provide the greatest value. Multi Client, Multi Modal: This On Track 1.0 product release includes the same day availability of  multiple clients, including iPhone and iPad applications which are now available on the Apple Store, a fully capable and accessible Outlook Add-In, along with our browser web client.  With each client we have sought to leverage the strengths of each unique device- our iPhone client supports picture and voice posts, the iPad is optimized for meeting room situations and document viewing, and our Outlook add-in allows you to take emails in context and bring them into On Track.  In addition to supporting a diverse array of clients, On Track provides a unified multi modal experience support starting with basic messages moving through to integrated documents with live annotations, snapshots, application sharing, and voice. Next Generation Web Architecture: We believe On Track will help move the bar higher for what users can expect from all web applications, most notably ones that involve real-time activity.  On Track is built from the ground up with an innovative, real-time architecture that leverages the extensive push capabilities of our server.  Whether you are receiving a new message, viewing where crowds of people are collaborating, or doing live annotation on a document with a set of people, that information comes to you immediately without refreshes or moving back and forth between pages.  We’ve leveraged this core architecture across the product experience and raised the user experience bar for this type of application.  As well these capabilities are based on open standards and protocols, and are fully extensible by anyone- enabling sophisticated integrations to be created with a wide variety of both legacy and next-generation applications. Agile Product Development: As a product team we operate using continuous feedback and modified agile development methodologies.  We have thousands of active internal Oracle users who have helped pilot our product for critical business functions, and the On Track product development team uses our product as our primary vehicle for all our collaboration.  Additionally we been working with early access customers who are adopting our technology and providing us valuable feedback - which our process has rapidly realized in improvements to our software.  On Track agility extends to our server as well, which is built to scale, and is very simple to install and configure. We are pleased to make this product announcement and encourage you to join us on Facebook or follow us on Twitter, as well as checking back here for the latest product information.

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• Switching my collision detection to array lists caused it to stop working

  - by Charlton Santana

  I have made a collision detection system which worked when I did not use array list and block generation. It is weird why it's not working but here's the code, and if anyone could help I would be very grateful :) The first code if the block generation. private static final List<Block> BLOCKS = new ArrayList<Block>(); Random rnd = new Random(System.currentTimeMillis()); int randomx = 400; int randomy = 400; int blocknum = 100; String Title = "blocktitle" + blocknum; private Block block; public void generateBlocks(){ if(blocknum > 0){ int offset = rnd.nextInt(250) + 100; //500 is the maximum offset, this is a constant randomx += offset;//ofset will be between 100 and 400 int randomyoff = rnd.nextInt(80); //500 is the maximum offset, this is a constant randomy = platformheighttwo - 6 - randomyoff;//ofset will be between 100 and 400 block = new Block(BitmapFactory.decodeResource(getResources(), R.drawable.block2), randomx, randomy); BLOCKS.add(block); blocknum -= 1; } The second is where the collision detection takes place note: the block.draw(canvas); works perfectly. It's the blocks that don't work. for(Block block : BLOCKS) { block.draw(canvas); if (sprite.bottomrx < block.bottomrx && sprite.bottomrx > block.bottomlx && sprite.bottomry < block.bottommy && sprite.bottomry > block.topry ){ Log.d(TAG, "Collided!!!!!!!!!!!!1"); } // bottom left touching block? if (sprite.bottomlx < block.bottomrx && sprite.bottomlx > block.bottomlx && sprite.bottomly < block.bottommy && sprite.bottomly > block.topry ){ Log.d(TAG, "Collided!!!!!!!!!!!!1"); } // top right touching block? if (sprite.toprx < block.bottomrx && sprite.toprx > block.bottomlx && sprite.topry < block.bottommy && sprite.topry > block.topry ){ Log.d(TAG, "Collided!!!!!!!!!!!!1"); } //top left touching block? if (sprite.toprx < block.bottomrx && sprite.toprx > block.bottomlx && sprite.topry < block.bottommy && sprite.topry > block.topry ){ Log.d(TAG, "Collided!!!!!!!!!!!!1"); } } The values eg bottomrx are in the block.java file..

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• Clever memory usage through the years

  - by Ben Emmett

  A friend and I were recently talking about the really clever tricks people have used to get the most out of memory. I thought I’d share my favorites, and would love to hear yours too! Interleaving on drum memory Back in the ye olde days before I’d been born (we’re talking the 50s / 60s here), working memory commonly took the form of rotating magnetic drums. These would spin at a constant speed, and a fixed head would read from memory when the correct part of the drum passed it by, a bit like a primitive platter disk. Because each revolution took a few milliseconds, programmers took to manually arranging information non-sequentially on the drum, timing when an instruction or memory address would need to be accessed, then spacing information accordingly around the edge of the drum, thus reducing the access delay. Similar techniques were still used on hard disks and floppy disks into the 90s, but have become irrelevant with modern disk technologies. The Hashlife algorithm Conway’s Game of Life has attracted numerous implementations over the years, but Bill Gosper’s Hashlife algorithm is particularly impressive. Taking advantage of the repetitive nature of many cellular automata, it uses a quadtree structure to store the hashes of pieces of the overall grid. Over time there are fewer and fewer new structures which need to be evaluated, so it starts to run faster with larger grids, drastically outperforming other algorithms both in terms of speed and the size of grid which can be simulated. The actual amount of memory used is huge, but it’s used in a clever way, so makes the list . Elite’s procedural generation Ok, so this isn’t exactly a memory optimization – more a storage optimization – but it gets an honorable mention anyway. When writing Elite, David Braben and Ian Bell wanted to build a rich world which gamers could explore, but their 22K memory was something of a limitation (for comparison that’s about the size of my avatar picture at the top of this page). They procedurally generated all the characteristics of the 2048 planets in their virtual universe, including the names, which were stitched together using a lookup table of parts of names. In fact the original plans were for 2^52 planets, but it was decided that that was probably too many. Oh, and they did that all in assembly language. Other games of the time used similar techniques too – The Sentinel’s landscape generation algorithm being another example. Modern Garbage Collectors Garbage collection in managed languages like Java and .NET ensures that most of the time, developers stop needing to care about how they use and clean up memory as the garbage collector handles it automatically. Achieving this without killing performance is a near-miraculous feet of software engineering. Much like when learning chemistry, you find that every time you think you understand how the garbage collector works, it turns out to be a mere simplification; that there are yet more complexities and heuristics to help it run efficiently. Of course introducing memory problems is still possible (and there are tools like our memory profiler to help if that happens to you) but they’re much, much rarer. A cautionary note In the examples above, there were good and well understood reasons for the optimizations, but cunningly optimized code has usually had to trade away readability and maintainability to achieve its gains. Trying to optimize memory usage without being pretty confident that there’s actually a problem is doing it wrong. So what have I missed? Tell me about the ingenious (or stupid) tricks you’ve seen people use. Ben

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• Upgraded to 12.04 now wifi doesn't work

  - by Benito Kestelman

  My laptop's wifi stopped working when I upgraded to Ubuntu 12.04 (wired works). I just reinstalled 12.04 over my old 12.04 on which wifi didn't work either in an attempt to restore any settings I may have accidentally changed, but it still doesn't work. I also used a wired connection to install updates in case this bug has been fixed, but it has not. Here is the result of sudo lshw -class network: *-network description: Wireless interface product: Centrino Wireless-N + WiMAX 6150 vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 67 serial: 40:25:c2:5f:5b:f4 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-29-generic-pae firmware=41.28.5.1 build 33926 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:51 memory:de800000-de801fff *-network description: Ethernet interface product: AR8151 v2.0 Gigabit Ethernet vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:04:00.0 logical name: eth0 version: c0 serial: 14:da:e9:c0:da:78 capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI firmware=N/A latency=0 link=no multicast=yes port=twisted pair resources: irq:54 memory:dd400000-dd43ffff ioport:a000(size=128) Here is rfkill list all: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no 1: asus-wlan: Wireless LAN Soft blocked: no Hard blocked: no 2: asus-wimax: WiMAX Soft blocked: no Hard blocked: no lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 003: ID 8087:07d6 Intel Corp. Bus 001 Device 004: ID 13d3:5710 IMC Networks Bus 002 Device 003: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth Bus 003 Device 003: ID 0781:5530 SanDisk Corp. Cruzer lspci: 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5) 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) 00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b5) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) 02:00.0 Network controller: Intel Corporation Centrino Wireless-N + WiMAX 6150 (rev 67) 03:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller 04:00.0 Ethernet controller: Atheros Communications Inc. AR8151 v2.0 Gigabit Ethernet (rev c0)

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• Delphi Prism and LINQ to SQL / Entity Framework

  - by Vegar

  I have found many posts and examples of using LINQ-syntax in Delphi Prism (Oxygene), but I have never found anything on LINQ to SQL or Entity Framework. Is it possible to use LINQ to SQL or Entity Framework together with Prism? Where can I found such an example? Update: Olaf is giving an answer through his blog The question is now if any visual tools and code generation is provided, or if everything must be done by hand... Second update: Olaf has answered the tool/code generation-question in a comment on his site: The class designer is there, but there is no Pascal code gen. According to marc hoffman that is currently not on their list. For now you have to live with manual mapping. I guess, if you had Visual Studio (not just the VS shell), that you could add a C# library project to your solution, reference that from your Prism project. Then create the Table-Class mapping in the C# project using the visual designer. Maybe somewhat ugly, but possibly the key to get the Designer + CodeGen integrated into Prism. Who cares what language is used for the mapping . I will say this is a 1 - 0 to c# vs prism. If I did not care which language is used for the mapping - why should I care about which language is used for the rest?

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• What off-the-shelf licensing system will meet my needs?

  - by Anders Pedersen

  I'm looking for an off-the-shelf license system for desktop software. After some research on the net -- and of course here on StackOverflow -- I haven't found one the suits our needs. I have a couple of must-have features and some would-be-nice features: Must have: Encrypted unlock key Possibility to automate the unlock key generation on my website User info in key so that I can show name and company in an about box and perhaps in reports Nice to have: License managing tools Online activation Nice upgrade possibilities to a version with concurrent license model and subscription model I have looked at Manco, but I find them difficult to work with and the documentation is minimal. Further, I couldn't get the name in the key. Also, the automatic generation of a key on my website has to be done with an application web service, but I would rather program against a DLL. Next I looked at xheo. It is easier to use and the documentation is better, but the price is substantially higher and here you can only get the user name in the license file that you then have to provide together with the unlock key. Could anyone share their experiences on what you are using and how it is working for you?

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• ASP.NET MVC static-asset aides/practices

  - by shannon

  I want to keep assets that are only used by one view in a view-specific folder, so my Search.aspx properly finds images/*.jpg, and helps me maintain my convention: ~/Areas/Candidate/Views/Job/Search.aspx -> ~/Assets/Candidate/Job/Search/images/*.jpg Perhaps with the ability to easily reference controller- or area-common assets manually or automatically: ~/Assets/Candidate/Job/images/*.jpg ~/Assets/Candidate/images/*.jpg If you wonder why I'm doing this, then speak up; I'm probably missing something. But here's why: I don't want stale static assets sitting in my ASP.NET MVC projects, which I expect to be an automatic outcome of the ~/Assets/Images folder: i.e. As a shared asset loses its last reference-count, who knows to delete it, especially with it being so difficult to trace content link validity in MVC projects? How do you, personally, do this? I can imagine, for example: Implement HtmlHelper extension methods for URL-generation. Extending ViewPage and ViewMasterPage with URL-generation methods. Implementing an inbound request filter to search related folders for static assets. and, are there good libraries out there for this? For example, something that also automatically appends timestamps for .JS and .CSS files, writes the / tags for me, and maybe even that allows me to inject includes in the head section from outside head code?

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• Advanced All In One .NET Framework

  - by alfredo dobrekk

  Hi, i m starting a new project that would basically take input from user and save them to database among about 30 screens, and i would like to find a framework that will allow the maximum number of these features out of the box : .net c#. windows form. unit testing continuous integration screens with lists, combo boxes, text boxes, add, delete, save, cancel that are easy to update when you add a property to your classes or a field to your database. auto completion on controls to help user find its way use of an orm like nhibernate easy multithreading and display of wait screens for user easy undo redo tabbed child windows search forms ability to grant access to some functionnalities according to user profiles mvp/mvvm or whatever design patterns either some code generation from database to c# classe or generation of database schema from c# classes some kind of database versioning / upgrade to easily update database when i release patches to application once in production automatic control resizing code metrics analysis some code generator i can use against my entities that would generate some rough form i can rearrange after code documentation generator ... Any ideas ? I know its lot but i really would like to use existing code to build upon so i can focus on business rules. Could splitting the requirements on 3 or 4 existing open source framework be possible ? Do u have any suggestion to add to the list before starting ? What open source tools would u use to achieve these ?

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• C# DynamicMethod prelink

  - by soywiz

  I'm the author of a psp emulator made in C#. I'm generating lots of "DynamicMethod" using ILGenerator. I'm converting assembly code into an AST, and then generating IL code and building that DynamicMethod. I'm doing this in another thread, so I can generate new methods while the program is executing others so it can run smoothly. My problem is that the native code generation is lazy, so the machine code is generated when the function is called, not when the IL is generated. So it generates in the program executing thread, native code generation is prettly slow as it is the asm-ast-il step. I have tried the Marshal.Prelink method that it is suposed to generate the machine code before executing the function. It does work on Mono, but it doesn't work on MS .NET. Marshal.Prelink(MethodInfo); Is there a way of prelinking a DynamicMethod on MS .NET? I thought adding a boolean parameter to the function that if set, exits the function immediately so no code is actually executed. I could "prelink" that way, but I think that's a nasty solution I want to avoid. Any idea?

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• VS 2008 C++ build output?

  - by STingRaySC

  Why when I watch the build output from a VC++ project in VS do I see: 1Compiling... 1a.cpp 1b.cpp 1c.cpp 1d.cpp 1e.cpp [etc...] 1Generating code... 1x.cpp 1y.cpp [etc...] The output looks as though several compilation units are being handled before any code is generated. Is this really going on? I'm trying to improve build times, and by using pre-compiled headers, I've gotten great speedups for each ".cpp" file, but there is a relatively long pause during the "Generating Code..." message. I do not have "Whole Program Optimization" nor "Link Time Code Generation" turned on. If this is the case, then why? Why doesn't VC++ compile each ".cpp" individually (which would include the code generation phase)? If this isn't just an illusion of the output, is there cross-compilation-unit optimization potentially going on here? There don't appear to be any compiler options to control that behavior (I know about WPO and LTCG, as mentioned above). EDIT: The build log just shows the ".obj" files in the output directory, one per line. There is no indication of "Compiling..." vs. "Generating code..." steps. EDIT: I have confirmed that this behavior has nothing to do with the "maximum number of parallel project builds" setting in Tools - Options - Projects and Solutions - Build and Run. Nor is it related to the MSBuild project build output verbosity setting. Indeed if I cancel the build before the "Generating code..." step, the ".obj" files will not exist for the most recent set of "compiled" files. E.g., if I cancel the build during "c.cpp" above, I will see only "a.obj" and "b.obj".

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• advanced winform framework

  - by alfredo dobrekk

  Hi, i m starting a new project that would basically take input from user and save them to database among about 30 screens, and i would like to find a framework that will allow the maximum number of these features out of the box : .net c#. windows form. unit testing continuous integration screens with lists, combo boxes, text boxes, add, delete, save, cancel that are easy to update when you add a property to your classes or a field to your database. auto completion on controls to help user find its way use of an orm like nhibernate easy multithreading and display of wait screens for user easy undo redo tabbed child windows search forms ability to grant access to some functionnalities according to user profiles mvp/mvvm or whatever design patterns either some code generation from database to c# classe or generation of database schema from c# classes some kind of database versioning / upgrade to easily update database when i release patches to application once in production code metrics analysis some code generator i can use against my entities that would generate some rough form i can rearrange after code documentation generator ... Any ideas ? I know its lot but i really would like to use existing code to build upon so i can focus on business rules. Do u have any suggestion to add to the list before starting ? What open source tools would u use to achieve these ?

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• Entity Framework: Auto-updating foreign key when setting a new object reference

  - by Adrian Grigore

  Hi, I am porting an existing application from Linq to SQL to Entity Framework 4 (default code generation). One difference I noticed between the two is that a foreign key property are not updated when resetting the object reference. Now I need to decide how to deal with this. For example supposing you have two entity types, Company and Employee. One Company has many Employees. In Linq To SQL, setting the company also sets the company id: var company=new Company(ID=1); var employee=new Employee(); Debug.Assert(employee.CompanyID==0); employee.Company=company; Debug.Assert(employee.CompanyID==1); //Works fine! In Entity Framework (and without using any code template customization) this does not work: var company=new Company(ID=1); var employee=new Employee(); Debug.Assert(employee.CompanyID==0); employee.Company=company; Debug.Assert(employee.CompanyID==1); //Throws, since CompanyID was not updated! How can I make EF behave the same way as LinqToSQL? I had a look at the default code generation T4 template, but I could not figure out how to make the necessary changes.

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• How to encapsulate a third party complex object structure?

  - by tangens

  Motivation Currently I'm using the java parser japa to create an abstract syntax tree (AST) of a java file. With this AST I'm doing some code generation (e.g.: if there's an annotation on a method, create some other source files, ...) Problem When my code generation becomes more complex, I've to dive deeper into the structure of the AST (e.g. I have to use visitors to extract some type information of method parameters). But I'm not sure if I want to stay with japa or if I will change the parser library later. Because my code generator uses freemarker (which isn't good at automatic refactoring) I want the interface that it uses to access the AST information to be stable, even if I decide to change the java parser. Question What's the best way to encapsulate complex datastructures of third party libraries? I could create my own datatypes and copy the parts of the AST that I need into these. I could create lots of specialized access methods that work with the AST and create exactly the infos I need (e.g. the fully qualified return type of a method as one string, or the first template parameter of a class). I could create wrapper classes for the japa datastructures I currently need and embed the japa types inside, so that I can delegate requests to the japa types and transform the resulting japa types to my wrapper classes again. Which solution should I take? Are there other (better) solutions to this problem?

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• Silverlight Business Application template with WCF is throwing warning.

  - by Manoj

  Hi, I am using the Silvelight Business Application template. I wrote a function which uses Membership.getUserList function to return the user list. I tried exposing it as Service using WCF. But when I try to compile the client side code it throws a warning saying "Client Proxy Generation for user_authentication.Web.Service1 failed'. Why does it happen? The complete warning message is: Warning 4 Client proxy generation for service 'user_authentication.Web.Service1' failed: Generating metadata files... Warning: Unable to load a service with configName 'user_authentication.Web.Service1'. To export a service provide both the assembly containing the service type and an executable with configuration for this service. Details:Either none of the assemblies passed were executables with configuration files or none of the configuration files contained services with the config name 'user_authentication.Web.Service1'. Warning: No metadata files were generated. No service contracts were exported. To export a service, use the /serviceName option. To export data contracts, specify the /dataContractOnly option. This can sometimes occur in certain security contexts, such as when the assembly is loaded over a UNC network file share. If this is the case, try copying the assembly into a trusted environment and running it.

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• Advanced All In One .NET Framework (should i go for a software factory ?)

  - by alfredo dobrekk

  Hi, i m starting a new project that would basically take input from user and save them to database among about 30 screens, and i would like to find a framework that will allow the maximum number of these features out of the box : .net c#. windows form. unit testing continuous integration logging screens with lists, combo boxes, text boxes, add, delete, save, cancel that are easy to update when you add a property to your classes or a field to your database. auto completion on controls to help user find its way use of an orm like nhibernate easy multithreading and display of wait screens for user easy undo redo tabbed child windows search forms ability to grant access to some functionnalities according to user profiles mvp/mvvm or whatever design patterns either some code generation from database to c# classe or generation of database schema from c# classes some kind of database versioning / upgrade to easily update database when i release patches to application once in production automatic control resizing code metrics analysis some code generator i can use against my entities that would generate some rough form i can rearrange after code documentation generator ... At this point i have 3 options : Build from scratch on top of clr :( Find functionnalities among several open source framework and use them as a stack for infrastucture Find a "software factory" I know its lot but i really would like to use existing code to build upon so i can focus on business rules. What open source tools would u use to achieve these ?

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• Handle complex options with Boost's program_options

  - by R S

  I have a program that generates graphs using different multi-level models. Each multi-level model consists of a generation of a smaller seed graph (say, 50 nodes) which can be created from several models (for example - for each possible edge, choose to include it with probability p). After the seed graph generation, the graph is expanded into a larger one (say 1000 nodes), using one of another set of models. In each of the two stages, each model require a different number of parameters. I would like to be have program_options parse the different possible parameters, according to the names of the models. For example, say I have two seed graphs models: SA, which has 1 parameters, and SB, which has two. Also for the expansion part, I have two models: A and B, again with 1 and 2 parameters, respectively. I would like to be able do something like: ./graph_generator --seed=SA 0.1 --expansion=A 0.2 ./graph_generator --seed=SB 0.1 3 --expansion=A 0.2 ./graph_generator --seed=SA 0.1 --expansion=B 10 20 ./graph_generator --seed=SB 0.1 3 --expansion=B 10 20 and have the parameters parsed correctly. Is that even possible?

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• Intermittent Windows Server 2008 BSOD and restart

  - by Timka

  Our EC2 Instance (Windows Server 2008) crashed multiple times for the past 3 months (last time was today at 1:05 EST). Upon reviewing MEMORY.DMP file we noticed that possible cause of the crashes is rhelnet.sys (RedHat PV NIC Driver). Server's Event Viewer has the following records right after the crash: Critical - Kernel Power: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. BugCheck: The computer has rebooted from a bugcheck. The bugcheck was: 0x000000d1 (0x000000000000002d, 0x0000000000000002, 0x0000000000000000, 0xfffff88001402d14). A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 100113-35849-01. Could this be a hardware issue? Would it help if we stop and start the instance? Or is this more likely that this is caused by the software running on the system? [Update 10.01.2013] Amazon Rep suggested to update RH drivers to Citrix PV drivers on our instance: Upgrading PV Drivers [Update 10.08.2013] We performed a drivers upgrade on the cloned instance. Right after the upgrade we noticed the following errors in our Event viewer: Xennet6 errors in Event Viewer (Event ID# 5001) After digging a bit more I found this article suggesting to install the latest Citrix drivers. Unfortunately, this didn't help us at all and our cloned instance became unresponsive. [Update 10.08.2013 2] I recreated an instance and updated PV drivers again. After searching on Internet I found this article where Amazon Rep explains that: "Event ID 5001 from source Xennet6 cannot be found" message does not indicate anything wrong, just that the PV driver is looking for a feature that we have not implemented in our version of Xen. I will keep my test system running for a while to see if there any issues with it.

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• Remote RIB iLO on Proliant via RIBCL

  - by Wudang

  I'm trying to automate a process for our Ops. The process requires that some windows servers running on blades are shut down, left down for a few hours, the restarted when some other processes complete. This is done by an op logging on to each blade's iLO web interface to stop and start. I've been trying to automate this with HP's cpqlocfg program with partial success. I can issue the GET_POWER, GET_USER_INFO, etc commands but SET_HOST_POWER fails in a specific way. Using the cpqlocfg GET_EVENTLOG command I can see the events XML login and the power comand being issued from the iLO interface but then nothing happens. Some hints from googling suggest ACPI isn't configured properly but I can't find any hits on how to verify this. Am I even using the right command? There's also a few other options like PRESS_PWR_BUTTON etc. Problem is I have nowhere to test this, all I can do at the moment is give a script to ops and ask them to try it as 4am on a Sunday when they try the proc. The shutdown is trivial as I can use the windows "shutdown" command, it's the power on that I need help on. Anyone done this? I'd tag this "rib ribcl ilo" but lack the rep points, sorry.

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• BSOD Before Windows Will Loads - Graphics Related

  - by Brian

  Alright deep breath here: (Windows 7 Home Premium 64 bit btw) Today I installed Star Craft 2 Beta. After trying to log in, it had some issues where it said my device stopped working (referring to my video device I have to imagine). After I force quit the game there were some random "hot" (various colors if i remember correctly) pixels on the screen. I decided to reboot and try again with similar results. I figured that maybe my display drivers could stand to be updated (I don't frequently update them as I don't often run into problems). I went out to nVidia's website and grabbed the latest drivers for Windows 7 64 bit GeForce 9 series. (I have SLi-ed 9800 GTs). Everything seemed to install fine and I performed the restart. This is when things went from bad (can't play SC2 beta ;) ) to worse (can't boot into windows!). Initially the very first splash screen - I think it's the bios splash screen - had lines of colored pixels covering it. It then displayed a screen that had lots of "(" on it. After that it showed the normal windows 7 splash screen as if it were going to load into Windows. Before getting much further, it BSODed on me. It was a 0x0000003B stop error. At nvlddmkm.sys. A little digging let verified that this was a problem with an nVidia graphics device, not a real shocker. Windows decided it would try to help me diagnose the problem, which it's only answer to was a System Restore, which did nothing to alleviate the problem. I was able to boot up fine in safe mode and was not able to roll back the driver, however I did uninstall the driver and reboot. I still had the graphical anomalies during the first two screens (same colored "."'s and weird "("'s), but there was NOT a stop error. Windows loaded up, found a default driver for the device and installed it and I restarted to let it load - and had yet another BSOD Stop error. Repeat driver uninstall, this time I reloaded the same version (I think it's possible that I was running a 32 bit version or a vista versus windows 7 version, but I don't have that information handy) of the nVidia driver from their website. Restart, same anomalies, same Stop Error. I am at a loss - At this point all I can think is that the firmware for the Video cards got fried or there's actual damage to the cards which I sincerely hope is not the case but the sooner I know the better. Any insight into what I might be able to do to troubleshoot/fix this problem would be most helpful. Attached below is a dump from DxDiag. Please let me know if there is more info that I could provide. ------------------ System Information ------------------ Time of this report: 3/18/2010, 23:22:48 Machine name: BRIAN-PC Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7600) (7600.win7_rtm.090713-1255) Language: English (Regional Setting: English) System Manufacturer: Dell Inc System Model: XPS 630i BIOS: Phoenix - AwardBIOS v6.00PG Processor: Intel(R) Core(TM)2 Quad CPU Q8200 @ 2.33GHz (4 CPUs), ~2.3GHz Memory: 8192MB RAM Available OS Memory: 8190MB RAM Page File: 1855MB used, 14521MB available Windows Dir: C:\Windows DirectX Version: DirectX 11 DX Setup Parameters: Not found User DPI Setting: Using System DPI System DPI Setting: 96 DPI (100 percent) DWM DPI Scaling: Disabled DxDiag Version: 6.01.7600.16385 32bit Unicode DxDiag Previously: Crashed in DirectShow (stage 1). Re-running DxDiag with "dontskip" command line parameter or choosing not to bypass information gathering when prompted might result in DxDiag successfully obtaining this information ------------ DxDiag Notes ------------ Display Tab 1: No problems found. Sound Tab 1: No problems found. Sound Tab 2: No problems found. Sound Tab 3: No problems found. Input Tab: No problems found. -------------------- DirectX Debug Levels -------------------- Direct3D: 0/4 (retail) DirectDraw: 0/4 (retail) DirectInput: 0/5 (retail) DirectMusic: 0/5 (retail) DirectPlay: 0/9 (retail) DirectSound: 0/5 (retail) DirectShow: 0/6 (retail) --------------- Display Devices --------------- Card name: Manufacturer: Chip type: DAC type: Device Key: Enum\ Display Memory: n/a Dedicated Memory: n/a Shared Memory: n/a Current Mode: 1600 x 1200 (32 bit) (1Hz) Driver Name: Driver File Version: () Driver Version: DDI Version: unknown Driver Model: unknown Driver Attributes: Final Retail Driver Date/Size: , 0 bytes WHQL Logo'd: n/a WHQL Date Stamp: n/a Device Identifier: {D7B70EE0-4340-11CF-B123-B03DAEC2CB35} Vendor ID: 0x0000 Device ID: 0x0000 SubSys ID: 0x00000000 Revision ID: 0x0000 Driver Strong Name: Unknown Rank Of Driver: Unknown Video Accel: Deinterlace Caps: n/a D3D9 Overlay: n/a DXVA-HD: n/a DDraw Status: Not Available D3D Status: Not Available AGP Status: Not Available ------------- Sound Devices ------------- Description: Speakers (Realtek High Definition Audio) Default Sound Playback: Yes Default Voice Playback: Yes Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0888&SUBSYS_10280249&REV_1001 Manufacturer ID: 1 Product ID: 100 Type: WDM Driver Name: RTKVHD64.sys Driver Version: 6.00.0001.5667 (English) Driver Attributes: Final Retail WHQL Logo'd: n/a Date and Size: 8/18/2008 04:05:28, 1485592 bytes Other Files: Driver Provider: Realtek Semiconductor Corp. HW Accel Level: Basic Cap Flags: 0x0 Min/Max Sample Rate: 0, 0 Static/Strm HW Mix Bufs: 0, 0 Static/Strm HW 3D Bufs: 0, 0 HW Memory: 0 Voice Management: No EAX(tm) 2.0 Listen/Src: No, No I3DL2(tm) Listen/Src: No, No Sensaura(tm) ZoomFX(tm): No Description: Realtek Digital Output (Realtek High Definition Audio) Default Sound Playback: No Default Voice Playback: No Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0888&SUBSYS_10280249&REV_1001 Manufacturer ID: 1 Product ID: 100 Type: WDM Driver Name: RTKVHD64.sys Driver Version: 6.00.0001.5667 (English) Driver Attributes: Final Retail WHQL Logo'd: n/a Date and Size: 8/18/2008 04:05:28, 1485592 bytes Other Files: Driver Provider: Realtek Semiconductor Corp. HW Accel Level: Basic Cap Flags: 0x0 Min/Max Sample Rate: 0, 0 Static/Strm HW Mix Bufs: 0, 0 Static/Strm HW 3D Bufs: 0, 0 HW Memory: 0 Voice Management: No EAX(tm) 2.0 Listen/Src: No, No I3DL2(tm) Listen/Src: No, No Sensaura(tm) ZoomFX(tm): No Description: Realtek HDMI Output (Realtek High Definition Audio) Default Sound Playback: No Default Voice Playback: No Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0888&SUBSYS_10280249&REV_1001 Manufacturer ID: 1 Product ID: 100 Type: WDM Driver Name: RTKVHD64.sys Driver Version: 6.00.0001.5667 (English) Driver Attributes: Final Retail WHQL Logo'd: n/a Date and Size: 8/18/2008 04:05:28, 1485592 bytes Other Files: Driver Provider: Realtek Semiconductor Corp. HW Accel Level: Basic Cap Flags: 0x0 Min/Max Sample Rate: 0, 0 Static/Strm HW Mix Bufs: 0, 0 Static/Strm HW 3D Bufs: 0, 0 HW Memory: 0 Voice Management: No EAX(tm) 2.0 Listen/Src: No, No I3DL2(tm) Listen/Src: No, No Sensaura(tm) ZoomFX(tm): No --------------------- Sound Capture Devices --------------------- Description: Microphone (Realtek High Definition Audio) Default Sound Capture: Yes Default Voice Capture: Yes Driver Name: RTKVHD64.sys Driver Version: 6.00.0001.5667 (English) Driver Attributes: Final Retail Date and Size: 8/18/2008 04:05:28, 1485592 bytes Cap Flags: 0x0 Format Flags: 0x0 Description: Realtek Digital Input (Realtek High Definition Audio) Default Sound Capture: No Default Voice Capture: No Driver Name: RTKVHD64.sys Driver Version: 6.00.0001.5667 (English) Driver Attributes: Final Retail Date and Size: 8/18/2008 04:05:28, 1485592 bytes Cap Flags: 0x0 Format Flags: 0x0 ------------------- DirectInput Devices ------------------- Device Name: Mouse Attached: 1 Controller ID: n/a Vendor/Product ID: n/a FF Driver: n/a Device Name: Keyboard Attached: 1 Controller ID: n/a Vendor/Product ID: n/a FF Driver: n/a Device Name: ESA FW Update Attached: 1 Controller ID: 0x0 Vendor/Product ID: 0x0955, 0x000A FF Driver: n/a Poll w/ Interrupt: No ----------- USB Devices ----------- + USB Root Hub | Vendor/Product ID: 0x10DE, 0x026D | Matching Device ID: usb\root_hub | Service: usbhub | +-+ USB Input Device | | Vendor/Product ID: 0x0955, 0x000A | | Location: Port_#0002.Hub_#0001 | | Matching Device ID: generic_hid_device | | Service: HidUsb | | | +-+ HID-compliant device | | | Vendor/Product ID: 0x0955, 0x000A | | | Matching Device ID: hid_device | | +-+ USB Input Device | | Vendor/Product ID: 0x046D, 0xC01E | | Location: Port_#0003.Hub_#0001 | | Matching Device ID: generic_hid_device | | Service: HidUsb | | | +-+ HID-compliant mouse | | | Vendor/Product ID: 0x046D, 0xC01E | | | Matching Device ID: hid_device_system_mouse | | | Service: mouhid ---------------- Gameport Devices ---------------- ------------ PS/2 Devices ------------ + Standard PS/2 Keyboard | Matching Device ID: *pnp0303 | Service: i8042prt | + Terminal Server Keyboard Driver | Matching Device ID: root\rdp_kbd | Upper Filters: kbdclass | Service: TermDD | + Terminal Server Mouse Driver | Matching Device ID: root\rdp_mou | Upper Filters: mouclass | Service: TermDD ------------------------ Disk & DVD/CD-ROM Drives ------------------------ Drive: C: Free Space: 324.3 GB Total Space: 608.4 GB File System: NTFS Model: WDC WD64 00AAKS-75A7B SCSI Disk Device Drive: D: Free Space: 1.0 GB Total Space: 2.0 GB File System: NTFS Model: WDC WD64 00AAKS-75A7B SCSI Disk Device Drive: E: Model: TSSTcorp DVD+-RW TS-H653F SCSI CdRom Device Driver: c:\windows\system32\drivers\cdrom.sys, 6.01.7600.16385 (English), , 0 bytes -------------- System Devices -------------- Name: PCI standard PCI-to-PCI bridge Device ID: PCI\VEN_10DE&DEV_03B7&SUBSYS_000010DE&REV_A1\3&2411E6FE&1&18 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03AF&SUBSYS_02491028&REV_A1\3&2411E6FE&1&0A Driver: n/a Name: PCI standard host CPU bridge Device ID: PCI\VEN_10DE&DEV_03A3&SUBSYS_02491028&REV_A2\3&2411E6FE&1&00 Driver: n/a Name: NVIDIA nForce Serial ATA Controller Device ID: PCI\VEN_10DE&DEV_0267&SUBSYS_02491028&REV_A1\3&2411E6FE&1&78 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03B6&SUBSYS_02491028&REV_A1\3&2411E6FE&1&10 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03AE&SUBSYS_02491028&REV_A1\3&2411E6FE&1&09 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_0272&SUBSYS_02491028&REV_A3\3&2411E6FE&1&52 Driver: n/a Name: NVIDIA nForce Serial ATA Controller Device ID: PCI\VEN_10DE&DEV_0266&SUBSYS_02491028&REV_A1\3&2411E6FE&1&70 Driver: n/a Name: LSI 1394 OHCI Compliant Host Controller Device ID: PCI\VEN_11C1&DEV_5811&SUBSYS_02491028&REV_70\4&14591D7E&0&2880 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03B5&SUBSYS_02491028&REV_A1\3&2411E6FE&1&06 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03AD&SUBSYS_02491028&REV_A1\3&2411E6FE&1&08 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_0270&SUBSYS_02491028&REV_A2\3&2411E6FE&1&48 Driver: n/a Name: Standard Dual Channel PCI IDE Controller Device ID: PCI\VEN_10DE&DEV_0265&SUBSYS_02491028&REV_A1\3&2411E6FE&1&68 Driver: n/a Name: NVIDIA GeForce 9800 GT Device ID: PCI\VEN_10DE&DEV_0605&SUBSYS_062D10DE&REV_A2\4&4BABE2A&0&0028 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03B4&SUBSYS_02491028&REV_A1\3&2411E6FE&1&07 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03AC&SUBSYS_02491028&REV_A1\3&2411E6FE&1&01 Driver: n/a Name: PCI standard PCI-to-PCI bridge Device ID: PCI\VEN_10DE&DEV_026F&SUBSYS_CB8410DE&REV_A2\3&2411E6FE&1&80 Driver: n/a Name: NVIDIA nForce PCI System Management Device ID: PCI\VEN_10DE&DEV_0264&SUBSYS_02491028&REV_A3\3&2411E6FE&1&51 Driver: n/a Name: NVIDIA GeForce 9800 GT Device ID: PCI\VEN_10DE&DEV_0605&SUBSYS_062D10DE&REV_A2\4&10BD3C89&0&0018 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03B3&SUBSYS_02491028&REV_A1\3&2411E6FE&1&0E Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03AB&SUBSYS_02491028&REV_A1\3&2411E6FE&1&04 Driver: n/a Name: Standard Enhanced PCI to USB Host Controller Device ID: PCI\VEN_10DE&DEV_026E&SUBSYS_02491028&REV_A3\3&2411E6FE&1&59 Driver: n/a Name: PCI standard ISA bridge Device ID: PCI\VEN_10DE&DEV_0260&SUBSYS_02491028&REV_A3\3&2411E6FE&1&50 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03BC&SUBSYS_02491028&REV_A1\3&2411E6FE&1&11 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03B2&SUBSYS_02491028&REV_A1\3&2411E6FE&1&0D Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03AA&SUBSYS_02491028&REV_A1\3&2411E6FE&1&02 Driver: n/a Name: Standard OpenHCD USB Host Controller Device ID: PCI\VEN_10DE&DEV_026D&SUBSYS_02491028&REV_A3\3&2411E6FE&1&58 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03BA&SUBSYS_02491028&REV_A1\3&2411E6FE&1&12 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03B1&SUBSYS_02491028&REV_A1\3&2411E6FE&1&0C Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03A9&SUBSYS_02491028&REV_A1\3&2411E6FE&1&03 Driver: n/a Name: High Definition Audio Controller Device ID: PCI\VEN_10DE&DEV_026C&SUBSYS_02491028&REV_A2\3&2411E6FE&1&81 Driver: n/a Name: PCI standard PCI-to-PCI bridge Device ID: PCI\VEN_10DE&DEV_03B8&SUBSYS_000010DE&REV_A1\3&2411E6FE&1&28 Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03B0&SUBSYS_02491028&REV_A1\3&2411E6FE&1&0B Driver: n/a Name: PCI standard RAM Controller Device ID: PCI\VEN_10DE&DEV_03A8&SUBSYS_02491028&REV_A2\3&2411E6FE&1&05 Driver: n/a Name: NVIDIA nForce Networking Controller Device ID: PCI\VEN_10DE&DEV_0269&SUBSYS_02491028&REV_A3\3&2411E6FE&1&A0 Driver: n/a --------------- EVR Power Information --------------- Current Setting: {5C67A112-A4C9-483F-B4A7-1D473BECAFDC} (Quality) Quality Flags: 2576 Enabled: Force throttling Allow half deinterlace Allow scaling Decode Power Usage: 100 Balanced Flags: 1424 Enabled: Force throttling Allow batching Force half deinterlace Force scaling Decode Power Usage: 50 PowerFlags: 1424 Enabled: Force throttling Allow batching Force half deinterlace Force scaling Decode Power Usage: 0

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• Connection speed drops from 1 Gbps to 10 Mbps (Vista 64)

  - by Kevin Hakanson

  I recently got a Windows Home Server (HP MediaSmart Server EX490) setup so I could do backups and other things. However, I am having trouble on my Vista 64 PC. The backup will be making great progress, then it will just slow down. At one point, I noticed the lights on my Netgear GS105 indicated it was not using a 1000 Mbps connection, but a 10 Mbps one. I checked the Status of Local Area Connection (Intel(R) 82567V-2 Gigabit Network Connection) and that also showed the same slow speed. This has happened several times in the last couple days. When I disabled the network device, and then enabled it, it established the 1 Gpbs connection again. However, some of the times the Sent Bytes Activity on the Status windows indicate that the data flow is still slow (100 to 1000 bytes every couple seconds). Obviously, at this rate I could backup faster to floppy disk. :) My question is how to diagnose and fix this problem. When I look at the Administrative Events, I do a Errors: Bonjour Service 456: ERROR: read_msg errno 10054 (An existing connection was forcibly closed by the remote host.) And a Warning: e1yexpress Intel(R) 82567V-2 Gigabit Network Connection Link has been disconnected. I am suspicious there is some power saving mode. I found a post suggesting System Idle Power Saver(SIPS) may be the issue. I am going to try that, but looking for other suggestions or diagnostic advice. I have several new items in this configuration: server, client software, switch and cat6 cables.

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• Audio Static/Interference regardless of audio interface?

  - by Tom

  I currently am running a media center/server on a Lubuntu machine. The machine specs: Core 2 Duo Extreme EVGA SLI 680i MotherBoard 2 GB DDR2 Ram 3 Hard Drives no raid - WD Caviar Black, Green, and Samsung Spinpoint Galaxy GTX 220 1GB External USB Creative XI-FI Extreme Card 550W Power Supply This machine is hooked up through an optical cable to an ONKYO HTR340 Receiver through the XIFI card. Whenever I play any audio regardless if it is through XBMC, the default audio player, a flash video, etc, I get a horrible static sound that randomly gets louder. Here is a video of the sound: http://www.youtube.com/watch?v=SqKQkxYRVA4 This static comes in randomly, sometimes going away for short periods, but eventually always comes back. So far I have tried everything I could think of: Reinstalling OS Installing/upgrading/repairing PulseAudio/Alsa Installing alternate OSes, straight Ubuntu, Lubuntu, Xubuntu, Arch, Mint, Windows 7 Switching audio from the external card to internal Optical, audio out through HDMI, audio out through headphones Different ports on receiver (my main desktop sounds fine on the same sound system) Different optical cables Unplugging everything unnecessary from the motherboard (1 HD, 1 Stick of Ram, 1 Keyboard) Swapping out ram Swapping out the motherboard Replacing the Graphics Card (was replaced due to fan being noisy, not specifically for this problem) Different harddrives Swapping power supply Disabling onboard audio Pretty much everything short of swapping the CPU. I haven't been able to narrow down the problem and it is getting frustrating. Is it possible that the CPU is faulty and might cause a problem such as this, or that the PC case is shorting out the motherboard? Any kind of suggestions will be appreciated.

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• Remove Kernel Lock from Unmounted Mass Storage USB Device from the Command Line in Linux

  - by Casey

  I've searched high and low, and can't figure this one out. I have a older Olympus Camera (2001 or so). When I plug in the USB connection, I get the following log output: $ dmesg | grep sd [20047.625076] sd 21:0:0:0: Attached scsi generic sg7 type 0 [20047.627922] sd 21:0:0:0: [sdg] Attached SCSI removable disk Secondly, the drive is not mounted in the FS, but when I run gphoto2 I get the following error: $ gphoto2 --list-config *** Error *** An error occurred in the io-library ('Could not lock the device'): Camera is already in use. *** Error (-60: 'Could not lock the device') *** What command will unmount the drive. For example in Nautilus, I can right click and select "Safely Remove Device". After doing that, the /dev/sg7 and /dev/sdg devices are removed. The output of gphoto2 is then: # gphoto2 --list-config /Camera Configuration/Picture Settings/resolution /Camera Configuration/Picture Settings/shutter /Camera Configuration/Picture Settings/aperture /Camera Configuration/Picture Settings/color /Camera Configuration/Picture Settings/flash /Camera Configuration/Picture Settings/whitebalance /Camera Configuration/Picture Settings/focus-mode /Camera Configuration/Picture Settings/focus-pos /Camera Configuration/Picture Settings/exp /Camera Configuration/Picture Settings/exp-meter /Camera Configuration/Picture Settings/zoom /Camera Configuration/Picture Settings/dzoom /Camera Configuration/Picture Settings/iso /Camera Configuration/Camera Settings/date-time /Camera Configuration/Camera Settings/lcd-mode /Camera Configuration/Camera Settings/lcd-brightness /Camera Configuration/Camera Settings/lcd-auto-shutoff /Camera Configuration/Camera Settings/camera-power-save /Camera Configuration/Camera Settings/host-power-save /Camera Configuration/Camera Settings/timefmt Some things I've tried already are sdparm and sg3_utils, however I am unfamiliar with them, so it's possible I just didn't find the right command. Update 1: # mount | grep sdg # mount | grep sg7 # umount /dev/sg7 umount: /dev/sg7: not mounted # umount /dev/sdg umount: /dev/sdg: not mounted # gphoto2 --list-config *** Error *** An error occurred in the io-library ('Could not lock the device'): Camera is already in use. *** Error (-60: 'Could not lock the device') ***

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• Proliant RAID 1 Rebuild Questions

  - by Nicholas

  I have a HP Proliant ML350 G5 server that experienced a power supply failure overnight. The power supply was replaced but unfortunately it got restarted with only 1 disk in the RAID 1 set plugged in. (The raid controller is the build in E200i). The raid BIOS then said on start-up that it had entered Interim Recovery Mode. However I would have expected it to still start up with only the 1 drive. The bios however says that it cannot find a C: drive and enters a reboot loop polling the other boot devices. First question is, is this normal behaviour not to start up on 1 disk? The second drive was then plugged in (all drives are ok) and the raid bios started an automatic rebuild on that disk. This appears to be a background process as there is no progress shown. However based on the light flashing it looks like it is working. My second question is how long will this rebuild take? (36GB 15K SAS drive). I cannot see any error messages and it looks like it is rebuilding the drive ok, but the computer still will not start-up. It still says during the boot up process that the C: drive is not found. If I wait for the rebuild to finish, is it likely to fix itself and find the C: drive? Or is there some other problem here?

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• Dell Management Packs in System Center Operations Manager 2007 R2?

  - by bwerks

  Hey all, I recently set up SCOM in a small business network environment. The root management server is a Dell Poweredge 2950, and I'd like to use SCOM to monitor it using Dell's management packs. I've imported the management packs into the SCOM deployment and followed Dell's installation instructions, but it doesn't seem to be fully working yet. Currently, the Diagram views in the Dell tree (Monitoring tab) seem to show me the server's place in the network topology, so it seems that at least part of it is working. However, none of the reports under "Performance and Power Monitoring Views" provide any information. When clicking on one of them (Power Consumption (Watts), for instance), the display area is blank and there is a tooltip visible that reads "No performance counter is selected. To select a counter, place a check mark in the Show column in legend below." However, in the legend, there's nothing there for me to check. I've installed OpenManage 6.2 on the server as per the Dell documentation, but I don't know what else I could have done that I missed. Does this sound like a familiar problem to anyone?

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• Asus P5Q doesn't post at all

  - by Sebi

  I had a very strange incident this evening. I was watching TV on the computer and suddenly the sound stutter. Some seconds later, the screen went black. First I thought ok some error, don't worry. Since the computer didn't react on any input from the mouse or keyboard, I shutted it down by pressing the power button. I tried to reboot but the monitor rest black. All the fans were running, the MB didn't made a beep and the leds are all green as they have to be. The HDD is running too, also the monitor is on. But nothing happens, not even a single message on the screen, just black. Here are the things I already tried with no success: tried to boot with 1 of two rams (each tested alone) turned off all power (pull th plug) for 10 minutes tested the graphic card with another pc. there it worked. tested the RAM with another pc. there it worked. Any hints what to do next?

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