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• Detecting tile with height in isometric game

  - by Carlos Navarro

  I'm trying to create an isometric tile-based game (for iPhone) and I'm having trouble with height in tiles. What I currently do (without heights) is apply some mathematic transformations to my 2D-matrix (which represent the tiles) so that I know where in the screen (x,y) should I place the isometric tile. Then, when the user clicks somewhere in the screen, I take that values and pass them through a function (kind of f^-1) to get which tile it belongs to. This works perfectly. My problem is: imagine that I want some tiles to have a different height from others. In order to draw the tile itself its pretty simple, since the z-coordinate has no transformation in the isometric approach used in games (z'=z). BUT what if I want to calculate the tile coordinate (defined by X-tile and Y-tile) from the touch coordinates (x,y)? Any guess?

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• It is inconsiderate to place editor settings inside code files?

  - by Carlos Campderrós

  I know this is kind of a subjective question, but I'm curious if there's any good reason to place (or not place) editor settings inside code files. I'm thinking in vi modelines, but it is possible that this applies to other editors. In short, a vi modeline is a line inside a file that tells vi how to behave (indent with spaces or tabs, set tabwidth to X, autoindent by default or not, ...) that is placed inside a comment, so it won't affect the program/compiler when running. In a .c file it could be similar to // vim: noai:ts=4:sw=4 On one hand, I think this shouldn't be inside the file, as it is an editor setting and so belongs to an editor configuration file or property. On the other hand, for projects involving developers outside one company (that are not imposed an editor/settings) or collaborators on github/bitbucket/... it is an easy way to avoid breaking the code style (tabs vs spaces for example), but only for the ones that use that editor though. I cannot see any powerful enough reason to decide for or against this practice, so I am in doubt of what to do.

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• cannot boot ubuntu 13.10 with my usb, Can i change the kernal on my laptop to run it?

  - by Carlos Dunick

  Currently i am running 12.04 and looking for an upgrade to 13.10 I first tried a bootable 64bit usb and failed. With the message saying "Kernal requires an x86-64 CPU but only detected an I686 CPU Unable to boot please use a kernal appropriate for your CPU" then tried 32bit and same message came up. Is this due to my laptop simply being to slow? or can/should i change the kernal somehow? Acer Aspire 5710z Intel Pentium dual core processor, 1.73Ghz, 533 MHz FSB, 1 MB L2 cache. 2GB DDR2 lspci 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03) 00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 02) 00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 02) 00:1c.2 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 3 (rev 02) 00:1c.3 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 4 (rev 02) 00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 02) 00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 02) 00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 02) 00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 02) 00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 02) 00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [AHCI mode] (rev 02) 00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 02) 04:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5787M Gigabit Ethernet PCI Express (rev 02) 05:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01) 06:00.0 FLASH memory: ENE Technology Inc ENE PCI Memory Stick Card Reader Controller 06:00.1 SD Host controller: ENE Technology Inc ENE PCI SmartMedia / xD Card Reader Controller 06:00.2 FLASH memory: ENE Technology Inc Memory Stick Card Reader Controller 06:00.3 FLASH memory: ENE Technology Inc ENE PCI Secure Digital / MMC Card Reader Controller

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• Error when try to install subversion on linux [closed]

  - by Juan Carlos Vega Neira

  Possible Duplicate: Fixing Could not get lock /var/lib/dpkg/lock I have installed Ubuntu server 11.10 and after the installation finishes I installed apache server by this code. sudo apt-get install apache2 Then I tried to install subversion by this code: sudo apt-get install subversion as I saw on some blogs and got this error: E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? How can I solve this error?

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• Exadata - Following up on customer deployments

  - by Carlos M. Orozco -Oracle

  Over the last year or so I've been visiting customers who have had Exadata deployed and have been enjoying the benefits the platform has been providing. Benefits include greater performance, consolidating multiple databases, data compression and time to value improvements. Most often I hear my reports run faster. One hospitality company report times that used to take 3 hrs now run in 12 seconds. Another services company reported all their batch reports taking 11hrs now run in 38 mins. Also reported that their transactions post faster, and batch updates run faster. So what does that mean? For most of them it means that now they have a platform that can handle growth. Most are growing 15% organically, but I've also seen 40% growth thru acquisition. Exadata has been keeping up with the additional data demand by customers leveraging compression and the smart storage features.

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• Vocabulary: Should I call this apply or map?

  - by Carlos Vergara

  So, I'm tasked with organizing the code and building a library with all the common code among our products. One thing that seems to happen all the time and I wanted to abstract is posted below in pseudocode, and I don't know how to call it (different products have different domain specific implementations and names for it) list function idk_what_to_name_it ( list list_of_callbacks, value common_parameter ): list list_of_results = new list for_each(callback in list_of_callbacks) list_of_results.push(callback(common_parameter)) end for_each return list_of_results end function Would you call this specific construct a list ListOfCallbacks.Map( value value_to_map) method or would it better be value Value.apply(list list_of_callbacks) I'm really curious about this kind of thing. Is there a standard guide for this stuff?

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• Using packages (gems, eggs, etc.) to create decoupled architectures

  - by Juan Carlos Coto

  The main issue Seeing the good support most modern programming platforms have for package management (think gem, npm, pip, etc), does it make sense to design an application or system be composed of internally developed packages, so as to promote and create a loosely coupled architecture? Example An example of this would be to create packages for database access, as well as for authentication and other components of the system. These, of course, use external packages as well. Then, your system imports and uses these packages - instead of including their code within its own code base. Considerations To me, it seems that this would promote code decoupling and help maintainability, almost in a Web-based-vs.-desktop-application kind of way (updates are applied almost automatically, single code base for single functionality, etc.). Does this seem like a rational and sane design concept? Is this actually used as a standard way of structuring applications today? Thanks very much!

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• Encryption Password help!

  - by Carlos L.

  Ok so let me summarize this up. I encrypted my Home to protect against hackers of course when I first installed Ubuntu. It loaded up the Terminal and was attempting to show me my encryption password incase it ever needed to be used. So I thought "Ehh what the heck, I can find it out later..." So I closed Terminal and went on with the (amazing!) Ubuntu life. But now I am having to install Java JDK 7.0.0.4 onto my computer to ya know, play games and such. But it is asking for my password for the encrypted Home folder but it never gave it to me... HELP!!! Does anyone remember the command for Terminal to give you you're randomly generated Encryption password pop up on the famous purple window? Please give legitimate answer and fast please!

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• XDIME for Mobile Applications

  - by Carlos Gavidia

  I'm involved in a project that requires to mobile-enable some previously developed Portlets. The Portlets are deployed in WebSphere Portal, and the container offers a technology called IBM Mobile Portal Accelerator that uses XDIME to render mobile pages according to the device. I'm trying to document myself in the technology and I'm having a bad time: Google only shows some outdated sites from IBM and even older posts from Volantis, another company involved in the technology (Amazon shows no related books). So... what's the current status of that technology actually? Is has some decent level of adoption?

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• What is the best way to update an unattached entity on Entity Framework?

  - by Carlos Loth

  Hi, In my project I have some data classes to retrieve data from the database using the Entity Framework. We called these classes *EntityName*Manager. All of them have a method to retrieve entities from database and they behave most like this: static public EntityA SelectByName(String name) { using (var context = new ApplicationContext()) { var query = from a in context.EntityASet where a.Name == name select a; try { var entityA = query.First(); context.Detach(entityA); return entityA; } catch (InvalidOperationException ex) { throw new DataLayerException( String.Format("The entityA whose name is '{0}' was not found.", name), ex); } } } You can see that I detach the entity before return it to the method caller. So, my question is "what is the best way to create an update method on my *EntityA*Manager class?" I'd like to pass the modified entity as a parameter of the method. But I haven't figured out a way of doing it without going to the database and reload the entity and update its values inside a new context. Any ideas? Thanks in advance, Carlos Loth.

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• Why did this work with Visual C++, but not with gcc?

  - by Carlos Nunez

  I've been working on a senior project for the last several months now, and a major sticking point in our team's development process has been dealing wtih rifts between Visual-C++ and gcc. (Yes, I know we all should have had the same development environment.) Things are about finished up at this point, but I ran into a moderate bug just today that had me wondering whether Visual-C++ is easier on newbies (like me) by design. In one of my headers, there is a function that relies on strtok to chop up a string, do some comparisons and return a string with a similar format. It works a little something like the following: int main() { string a, b, c; //Do stuff with a and b. c = get_string(a,b); } string get_string(string a, string b) { const char * a_ch, b_ch; a_ch = strtok(a.c_str(),","); b_ch = strtok(b.c_str(),","); } strtok is infamous for being great at tokenizing, but equally great at destroying the original string to be tokenized. Thus, when I compiled this with gcc and tried to do anything with a or b, I got unexpected behavior, since the separator used was completely removed in the string. Here's an example in case I'm unclear; if I set a = "Jim,Bob,Mary" and b="Grace,Soo,Hyun", they would be defined as a="JimBobMary" and b="GraceSooHyun" instead of staying the same like I wanted. However, when I compiled this under Visual C++, I got back the original strings and the program executed fine. I tried dynamically allocating memory to the strings and copying them the "standard" way, but the only way that worked was using malloc() and free(), which I hear is discouraged in C++. While I'm curious about that, the real question I have is this: Why did the program work when compiled in VC++, but not with gcc? (This is one of many conflicts that I experienced while trying to make the code cross-platform.) Thanks in advance! -Carlos Nunez

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• Question about memory allocation when initializing char arrays in C/C++.

  - by Carlos Nunez

  Before anything, I apologize if this question has been asked before. I am programming a simple packet sniffer for a class project. For a little while, I ran into the issue where the source and destination of a packet appeared to be the same. For example, the source and destination of an Ethernet frame would be the same MAC address all of the time. I custom-made ether_ntoa(char *) because Windows does not seem to have ethernet.h like Linux does. Code snippet is below: char *ether_ntoa(u_char etheraddr[ETHER_ADDR_LEN]) { int i, j; char eout[32]; for(i = 0, j = 0; i < 5; i++) { eout[j++] = etheraddr[i] >> 4; eout[j++] = etheraddr[i] & 0xF; eout[j++] = ':'; } eout[j++] = etheraddr[i] >> 4; eout[j++] = etheraddr[i] & 0xF; eout[j++] = '\0'; for(i = 0; i < 17; i++) { if(eout[i] < 10) eout[i] += 0x30; else if(eout[i] < 16) eout[i] += 0x57; } return(eout); } I solved the problem by using malloc() to have the compiler assign memory (i.e. instead of char eout[32], I used char * eout; eout = (char *) malloc (32);). However, I thought that the compiler assigned different memory locations when one sized a char-array at compile time. Is this incorrect? Thanks! Carlos Nunez

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• How to pair users? (Like Omegle.com)

  - by Carlos Dubus

  Hi, I'm trying to do an Omegle.com clone script, basically for learning purposes. I'm doing it in PHP/MySQL/AJAX. I'm having problems finding two users and connecting them. The purpose of omegle is connecting two users "randomly". What I'm doing right now is the following: When a user enters the website a session is assigned. There are 3 states for each session/user (Normal,Waiting,Chatting) At first the user has state Normal and a field "connected_to" = NULL If the users clicks the START button, a state of "Waiting" is assigned. Then it looks for another user with state Waiting, if doesn't find one then it keeps looping, waiting for the "connected_to" to change. The "connected_to" will change when other user click START and then find another user waiting and updates the sessions accordingly. Now this have several problems, like: A user only can be connected to one user at a time. In omegle you can open more than one chat simultaneously. I don't know if this is the best way. About the chat, each user is polling the events from the server with AJAX calls, I saw that omegle, instead of several HTTP requests each second (let's say), does ONE request and wait for an answer, that means that the PHP script is looping indefinitely until gets an answer.I did this using set_time_limit(30) each time the loop is started. Then when the Ajax call is done start over again. Is this approach correct? I will appreciate a LOT your answers, Thank you, Carlos

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• Silverlight Cream for April 29, 2010 -- #851

  - by Dave Campbell

  In this Issue: Carlos Figueira(-2-), Subodh Pushpak, Gergely Orosz, John Papa, Mike Snow(-2-), Rishi, Tim Heuer, Stefan Olson, and David Anson. Shoutouts: Josh Holmes blogged about a cool app the City of Miami has up: Miami 311: Built on Windows Azure Gergely Orosz reports on the state of a bug he found pre SL4: Silverlight 4 still displays large elements incorrectly Laura Foy and Charlie Kindel discuss WP7 on Channel 9: Windows Phone 7 Developer Tools Refresh Announced Charlie Kindel has an announcement, good instructions, and what's new notes on the Windows Phone Developer Tools CTP Refresh! Tim Heuer mentioned the workaround for this in his post (below), but I thought you might like to read Brandon Watson's debrief of what it's all about: Signed Assemblies Bug in the Windows Phone Tools CTP Refresh Laurent Bugnion posted about interrelations between versions of Blend and WP7 code... read it closely: Be careful when installing the Blend Windows Phone 7 Add-In From SilverlightCream.com: Consuming REST/POX services in Silverlight 4 Carlos Figueira has a pair of posts up about consuming services in Silverlight 4. This first one is about consuming REST/POX services. He provides a Service Contract that can be used with either and the full project code is available as well. Consuming REST/JSON services in Silverlight 4 In the second post, Carlos Figueira provides the code to allow WCF and Silverlight 4 to consume strongly-typed REST/JSON... and again, all the code is available. Silverlight and WCF caching Subodh Pushpak has a post up discussing caching in WCF, and has code demonstrating turning caching on at run-time. Detecting Silverlight Version Installed Gergely Orosz said it right when he said "Detecting the Silverlight version installed on a client machine isn’t entirely straightforward." ... and after reading this post, if you take the link to his ScottLogic blog, you'll get a full break-out of how it's done. Silverlight TV 22: Tim Heuer on Extending the SMF It's Thursday, and that means Silverlight TV! ... this week, John Papa has on Tim Heuer who has always been out there pushing media... and he's talking about SMF or Silverlight Media Framework for the uninitiated, and also extending it. Silverlight Tip of the Day #7 – Localized Resources Mike Snow has Tip Number 7 up and it's about localization... good end-to-end discussion and demonstration. Just thought I should use that to prove to my daughter that the tatoo she had put on the back of her neck actually reads "Eat More Broccoli" :) Silverlight Tip of the Day #8 – Detecting Alt, Shift, Control, Window & Apple Keys Combinations I just realized Mike Snow's site logo reads "Silverlight Tips of the Day" (bolding mine) ... that answers why I'm seeing more than one -- sorry Mike, couldn't pass it up :) ... Mike's second tip today and number 8 in the series is on detecting all the mouse button and ctl/alt/shift combinations in Silverlight. nRoute: More Wholesomeness, with SL 4 and .NET 4.0 Rishi has a post up announcing a new nRoute release for Silverlight 4 and .NET 4.0 He's tweaked the code to take advantages of enhancements in the new platforms, so check it out. Windows Phone 7 Developer Tools April 2010 Refresh Booya... Tim Heuer announced the release of the next drop in the WP7 tools ... dang wish I was at home today :) ... be sure to read the post for info such as the notes about Authenticode Assemblies and the release notes. Updates to Silverlight Multi-binding support Stefan Olson points up a SL4 change to Multi-binding support that he had previously blogged about. He shows the previous non-working example, and what you have to do to make it work now. Using XAML to create a custom wallpaper image for your mobile device David Anson has a solution for those pesky lost devices, and let me go on the record right now saying if anyone finds a WP7 phone laying around, just call me, it's mine :) [think that'd work??] ... ok, David's solution is a WPF app "MobileDeviceHomeScreenMaker" that you get the info set and it produces a png you then put on your device. But seriously about that lost phone... Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• C++ Compile problem when using Windows - CodeGear

  - by Carlos

  This is a follow-up question to this one i made earlier. Btw thanks Neil Butterworth for you help http://stackoverflow.com/questions/2461977/problem-compiling-c-in-codegear A quick recap. Im currently developing a C++ program for university, I used Netbeans 6.8 on my personal computer (Mac) and all works perfect. When I try them on my windows partition or at the university PC's using CodeGear RAD Studio 2009 & 2010 i was getting a few compile errors which were solved by adding the following header file: #include <string> However now the program does compile but it doesn't run, just a blank console. And am getting the following in the CodeGear event's log: Thread Start: Thread ID: 2024. Process Project1.exe (3280) Process Start: C:\Users\Carlos\Documents\RAD Studio\Projects\Debug\Project1.exe. Base Address: $00400000. Process Project1.exe (3280) Module Load: Project1.exe. Has Debug Info. Base Address: $00400000. Process Project1.exe (3280) Module Load: ntdll.dll. No Debug Info. Base Address: $77E80000. Process Project1.exe (3280) Module Load: KERNEL32.dll. No Debug Info. Base Address: $771C0000. Process Project1.exe (3280) Module Load: KERNELBASE.dll. No Debug Info. Base Address: $75FE0000. Process Project1.exe (3280) Module Load: cc32100.dll. No Debug Info. Base Address: $32A00000. Process Project1.exe (3280) Module Load: USER32.dll. No Debug Info. Base Address: $77980000. Process Project1.exe (3280) Module Load: GDI32.dll. No Debug Info. Base Address: $75F50000. Process Project1.exe (3280) Module Load: LPK.dll. No Debug Info. Base Address: $75AB0000. Process Project1.exe (3280) Module Load: USP10.dll. No Debug Info. Base Address: $76030000. Process Project1.exe (3280) Module Load: msvcrt.dll. No Debug Info. Base Address: $776A0000. Process Project1.exe (3280) Module Load: ADVAPI32.dll. No Debug Info. Base Address: $777D0000. Process Project1.exe (3280) Module Load: SECHOST.dll. No Debug Info. Base Address: $77960000. Process Project1.exe (3280) Module Load: RPCRT4.dll. No Debug Info. Base Address: $762F0000. Process Project1.exe (3280) Module Load: SspiCli.dll. No Debug Info. Base Address: $759F0000. Process Project1.exe (3280) Module Load: CRYPTBASE.dll. No Debug Info. Base Address: $759E0000. Process Project1.exe (3280) Module Load: IMM32.dll. No Debug Info. Base Address: $763F0000. Process Project1.exe (3280) Module Load: MSCTF.dll. No Debug Info. Base Address: $75AD0000. Process Project1.exe (3280) I would really appreciate any help or ideas on how to solve this problem. P.S: In the case anyone wonders why am I sticking with CodeGear is because is the IDE professors use to evaluate our assignments.

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• Android Market : Google supprime 21 applications populaires infectées de malwares et lance leur désinstallation à distance

  Android Market : Google supprime 21 applications populaires infectées Par des malwares et lance leur désinstallation à distance Google vient de bannir de l'Android Market pas moins de 21 applications populaires, en raison de nombreux Malwares et Trojans qu'elles contiennent. Ces applications appartiennent au même développeur (Myournet) et intègrent toutes l'exploit nommé « rage-against-the-cage », qui permet au code malicieux d'obtenir le droit d'administrateur principal (root) sur les versions d'Android antérieures à la 2.2.2. Ce droit acquis, les applications étaient en mesure de télécharger et d'exécuter du code via des portes dérobées, ouvrant ainsi la voie à de...

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• OpenBSD : NETSEC certainement impliqué dans une tentative d'insertion de backdoors, selon le responsable de l'OS

  OpenBSD : NETSEC certainement impliqué dans la tentative d'insertion de backdoors Sur demande du FBI, mais toujours aucune trace avérée de porte dérobée Mise à jour du 23/12/2010 Les investigations avancent sur les allégations émises la semaine dernière quant à une éventuelle insertion de portes dérobées (backdoors) dans le système OpenBSD (lire ci-avant). Une opération qui aurait été commanditée par le FBI. Theo de Raadt, le développeur principal du système, à l'origine de la divulgation de cette affaire (et au début plutôt sceptique), vient de rendre public un mail dans lequel il explique qu'...

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• Windows TV devrait arriver au CES 2011 ainsi qu'une version modifiée de Windows 7 pour les tablettes, et Windows 8 ?

  Windows TV devrait arriver au CES 2011 ainsi qu'une version modifiée de Windows 7 pour les tablettes, et Windows 8 ? Bientôt, le Consumer Electronics Show (CES) 2011 de Las Vegas qui réunira environ 120 000 participants de plusieurs pays, et plus de 2 500 sociétés va ouvrir ses portes. Le CES de cette année devrait être très axé sur les tablettes, les téléviseurs et les systèmes embraquées. Le Seattle Times, journal incontournable de la ville de Microsoft, semble avoir quelques informations intéressantes. Tout d'abord,

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• Sécurité : deux millions de mots de passe WordPress réinitialisés suite à la découverte de contributions malicieuses à trois plug-ins populaires

  Sécurité : deux millions de mots de passe WordPress réinitialisés Suite à la découverte de contributions malicieuses à trois plug-ins populaires Automatic vient de lancer une dépêche de sécurité importante sur le blog officiel de WordPress, y notifiant tous les utilisateurs du Blogware/CMS de la découverte de plusieurs contributions malintentionnées au code de trois de ses plug-ins les plus populaires. Des commits acceptés sur le code de AddThis, WPtouch, et W3 Total Cache, se révèlent contenir des portes dérobées soigneusement dissimulées, créées et propagées par un ou plusieurs pirates non encore identifiés. Automatic assure que les contributions malicieuses ne pr...

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• Windows 8 : le Windows Store s'ouvre aux développeurs de 120 pays, la francophonie représentée de manière quasi exhaustive

  Windows Store : Microsoft fait le point sur les licences d'applications tests avant achat, ventes des fonctionnalités, nombre de machines utilisées Mise à jour du 13/03/2012 Le Windows Store a ouvert ses portes depuis quelques semaines et les utilisateurs peuvent déjà profiter gratuitement des premières applications de style Metro présentes sur la galerie. Pour cela, ils doivent disposer d'un compte Microsoft pour se connecter. Le modèle de licence des applications du magasin dont Microsoft vient de faire une description permet d'offrir aux clients l'accès à l'ensemble de leurs applications sur tous leurs appareils Windows 8, l...

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• Xenserver 5.6 SR_BACKEND_FAILURE_47 no such volume group, but it is there

  - by Juan Carlos

  I've looked everywhere (Google, here, a bunch of other sites), and while I have found people with similar problems, I couldn't find a single one with a solution to this. Last night our xenserver 5.6 box corrupted the /var/xapi/state.db, and I couldn't fix the xml, no matter what I did. After a good hour fiddling with the file, I figured it would be faster to just reinstall. The server had one 2tb hard drive running Xen and its VMs, and since Xen's install said it would erase the hard drive it was installed on, I plugged a new harddrive and installed Xen on it, without selecting any hard drives for storage. I Figured I could make it happen after install, using the partition on the old harddrive with all my VMs on it. After instalation finished and the system booted I did: #fdisk -l found the old partition at /dev/sda3 #ll /dev/disk/by-id found the partition at /dev/disk/by-id/scsi-3600188b04c02f100181ab3a48417e490-part3 #xe host-list uuid ( RO) : a019d93e-4d84-4a4b-91e3-23572b5bd8a4 name-label ( RW): xenserver-scribfourteen name-description ( RW): Default install of XenServer #pvscan PV /dev/sda3 VG VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d lvm2 [1.81 TB / 204.85 GB free] Total: 1 [1.81 TB] / in use: 1 [1.81 TB] / in no VG: 0 [0 ] #vgscan Reading all physical volumes. This may take a while... Found volume group "VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d" using metadata type lvm2 # pvdisplay --- Physical volume --- PV Name /dev/sda3 VG Name VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d PV Size 1.81 TB / not usable 6.97 MB Allocatable yes PE Size (KByte) 4096 Total PE 474747 Free PE 52441 Allocated PE 422306 PV UUID U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW # xe sr-introduce name-label="VMs" type=lvm uuid=U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW name-description="VMs Local HD Storage" content-type=user shared=false device-config=:device=/dev/disk/by-id/scsi-3600188b04c02f100181ab3a483f9f0ae-part3 U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW # xe pbd-create host-uuid=a019d93e-4d84-4a4b-91e3-23572b5bd8a4 sr-uuid=U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW device-config:device=/dev/disk/by-id/scsi-3600188b04c02f100181ab3a483f9f0ae-part3 adf92b7f-ad40-828f-0728-caf94d2a0ba1 # xe pbd-plug uuid=adf92b7f-ad40-828f-0728-caf94d2a0ba1 Error code: SR_BACKEND_FAILURE_47 Error parameters: , The SR is not available [opterr=no such volume group: VG_XenStorage-U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW] At this point I did a # vgrename VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d VG_XenStorage-U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW cause the VG name was different, but pdb-plug still gives me the same error. So, now I'm kinda lost about what to do, I'm not used to Xen and most sites I've been finding are really unhelpful. I hope someone can guide me in the right way to fix this. I cant lose those VMs (got backups, but from inside the guests, not the VMs themselves).

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• SQL Server 2008 R2 Enterprise won't install on Windows 2008 R2 Enterprise

  - by Carlos Paulino

  I've been trying to install SQL Server on a new Windows Server 2008. I have tried everything but I haven't been able to narrow down the problem. When the installation fails I get " Exit code (Decimal): -2068643839". The problem with this is that according to Microsoft this is a generic error code. I follow their guide to look into the detail.txt inside C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\ But I can't find something that specifies the exact error. Any suggestions ? Thanks in advanced. I uploaded to detail.txt to http://www.megaupload.com/?d=0MV46SZH because it is to big to paste here. Below is the summary.txt ---------- Overall summary: Final result: SQL Server installation failed. To continue, investigate the reason for the failure, correct the problem, uninstall SQL Server, and then rerun SQL Server Setup. Exit code (Decimal): -2068643839 Exit facility code: 1203 Exit error code: 1 Exit message: SQL Server installation failed. To continue, investigate the reason for the failure, correct the problem, uninstall SQL Server, and then rerun SQL Server Setup. Start time: 2011-02-28 11:29:56 End time: 2011-02-28 11:34:45 Requested action: Install Machine Properties: Machine name: SA-SERVER Machine processor count: 8 OS version: Windows Server 2008 R2 OS service pack: Service Pack 1 OS region: United States OS language: English (United States) OS architecture: x64 Process architecture: 64 Bit OS clustered: No Product features discovered: Product Instance Instance ID Feature Language Edition Version Clustered Package properties: Description: SQL Server Database Services 2008 R2 ProductName: SQL Server 2008 R2 Type: RTM Version: 10 SPLevel: 0 Installation location: F:\x64\setup\ Installation edition: ENTERPRISE User Input Settings: ACTION: Install ADDCURRENTUSERASSQLADMIN: True AGTSVCACCOUNT: NT AUTHORITY\SYSTEM AGTSVCPASSWORD: ***** AGTSVCSTARTUPTYPE: Manual ASBACKUPDIR: Backup ASCOLLATION: Latin1_General_CI_AS ASCONFIGDIR: Config ASDATADIR: Data ASDOMAINGROUP: <empty> ASLOGDIR: Log ASPROVIDERMSOLAP: 1 ASSVCACCOUNT: <empty> ASSVCPASSWORD: ***** ASSVCSTARTUPTYPE: Automatic ASSYSADMINACCOUNTS: <empty> ASTEMPDIR: Temp BROWSERSVCSTARTUPTYPE: Disabled CONFIGURATIONFILE: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20110228_112601\ConfigurationFile.ini CUSOURCE: ENABLERANU: False ENU: True ERRORREPORTING: False FARMACCOUNT: <empty> FARMADMINPORT: 0 FARMPASSWORD: ***** FEATURES: SQLENGINE,BIDS,CONN,IS,BC,SDK,SSMS,ADV_SSMS,SNAC_SDK,OCS FILESTREAMLEVEL: 0 FILESTREAMSHARENAME: <empty> FTSVCACCOUNT: <empty> FTSVCPASSWORD: ***** HELP: False IACCEPTSQLSERVERLICENSETERMS: False INDICATEPROGRESS: False INSTALLSHAREDDIR: C:\Program Files\Microsoft SQL Server\ INSTALLSHAREDWOWDIR: C:\Program Files (x86)\Microsoft SQL Server\ INSTALLSQLDATADIR: <empty> INSTANCEDIR: D:\SQLServer INSTANCEID: MSSQLSERVER INSTANCENAME: MSSQLSERVER ISSVCACCOUNT: NT AUTHORITY\SYSTEM ISSVCPASSWORD: ***** ISSVCSTARTUPTYPE: Automatic NPENABLED: 0 PASSPHRASE: ***** PCUSOURCE: PID: ***** QUIET: False QUIETSIMPLE: False ROLE: AllFeatures_WithDefaults RSINSTALLMODE: FilesOnlyMode RSSVCACCOUNT: NT AUTHORITY\NETWORK SERVICE RSSVCPASSWORD: ***** RSSVCSTARTUPTYPE: Automatic SAPWD: ***** SECURITYMODE: SQL SQLBACKUPDIR: <empty> SQLCOLLATION: SQL_Latin1_General_CP1_CI_AS SQLSVCACCOUNT: NT AUTHORITY\SYSTEM SQLSVCPASSWORD: ***** SQLSVCSTARTUPTYPE: Automatic SQLSYSADMINACCOUNTS: SA-SERVER\Administrator SQLTEMPDBDIR: <empty> SQLTEMPDBLOGDIR: <empty> SQLUSERDBDIR: <empty> SQLUSERDBLOGDIR: <empty> SQMREPORTING: False TCPENABLED: 1 UIMODE: Normal X86: False Configuration file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20110228_112601\ConfigurationFile.ini Detailed results: Feature: Database Engine Services Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: SQL Client Connectivity SDK Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Integration Services Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Client Tools Connectivity Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Management Tools - Complete Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Management Tools - Basic Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Client Tools SDK Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Client Tools Backwards Compatibility Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Business Intelligence Development Studio Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Feature: Microsoft Sync Framework Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Rules with failures: Global rules: Scenario specific rules: Rules report file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20110228_112601\SystemConfigurationCheck_Report.htm

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• Dual monitors through 1 HDMI port

  - by Carlos

  I currently have a Dell Studio XPS 13 laptop connected to a 24" HP monitor (w2448hc). Im thinking on getting a second one, however am wondering what i need for the setup (hardware wise). Also I was wondering it there is any down side to it, or something i should be aware of. For example, image quality loss, GPU overloading, or anything important I should know. More than anything Im interested in your advice. Also the monitors do have built in speakers (HDMI sound output), is the sound going to be reproduced by only one monitor or both? Specs Model: Dell Studio XPS 13 OS: Genuine Windows® 7 Home Premium 64-Bit CPU: Intel® CoreTM 2 Duo P8600 (2.4GHz, 3MB L2 Cache, 1067MHz FSB) Chipset: NVIDIA® GeForce® MCP79MX RAM: 4GB 1067MHz DDR3 SDRAM Graphics: SLi NVIDIA® GeForce® 9500M - 256MB Thanks for your advice, if there is anything additional i need to buy an you have a personal preference pass the brand name so i can check it out. Thanks!

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• Dual monitors though 1 HDMI port

  - by Carlos

  I currently have a Dell Studio XPS 13 laptop connected to a 24" HP monitor (w2448hc). Im thinking on getting a second one, however am wondering what i need for the setup (hardware wise). Also I was wondering it there is any down side to it, or something i should be aware of. For example, image quality loss, GPU overloading, or anything important I should know. More than anything Im interested in your advice. Also the monitors do have built in speakers (HDMI sound output), is the sound going to be reproduced by only one monitor or both? Specs Model: Dell Studio XPS 13 OS: Genuine Windows® 7 Home Premium 64-Bit CPU: Intel® CoreTM 2 Duo P8600 (2.4GHz, 3MB L2 Cache, 1067MHz FSB) Chipset: NVIDIA® GeForce® MCP79MX RAM: 4GB 1067MHz DDR3 SDRAM Graphics: SLi NVIDIA® GeForce® 9500M - 256MB Thanks for your advice, if there is anything additional i need to buy an you have a personal preference pass the brand name so i can check it out. Thanks!

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• Mac OS X Update 10.6.8 weird phishing behaviour

  - by Carlos

  I just updated to Mac App Store 1.0.2 with the update to 10.6.8. The Mac App Store said I have one update available, for Angry Birds.... I do not have Angry Birds on my system, but when I clicked the update button I got the following message. "You have updates available for other accounts. Sign in to [email protected] to update applications for that account." Needless to say this account does not exist. Any ideas what this is all about?

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