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• Windows XP waits for usb drive on almost every operation.

  - by Tomasz Kowalczyk

  Hello everyone, I have a problem with my Windows XP operating system, particularly with the USB device that is plugged in - 1TB WD My Book external drive. I haven't found any information about such behaviour when searching in Internet, so I have to ask You. The problem is: when I am using computer, especially during work (programming), when I try to access any information on a hard disk ("internal" one), Windows seems to "consult" it with the external drive. For example, when I open file selection dialog window, if I try to change directory, system activates external drive, reads something (I hear the disk's operational noise) and after some seconds of such pause it makes the operations I requested. There are many situations in which I can reproduce this behavior - opening My Computer, shutting down system, opening partition folder from My Computer - every operation involves the usage of external drive. Please understand me properly - this is not something that happens EVERY time, but at least "many" times a day. What causes such behavior and how can I "turn off" external drive when it's not needed? Thanks in advance for your answers.

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• nginx error page and internal directives not working as expected

  - by Romain

  I'd like to setup my nginx server to return a specific error page on HTTP 50x status codes, and I'd like this page to be unavailable by a direct request from users (e.g., http//mysite/internalerror). For that, I'm using nginx's internal directive, but I must be missing something, as when I put that directive on my /internalerror location, nginx returns a custom 404 error (which isn't even my own 404 error page) when a page crashes. So, to summarize, here's what seems to happen: GET /Home nginx passes the query to Python I'm simulating an application bug to get the 502 error code nginx tries to return /InternalError from its error_page rule because of the internal rule, it finally fails back to a custom 404 error code <-- why? the documentation says error_page directives are not concerned by internal: http://wiki.nginx.org/HttpCoreModule#internal Here's an extract from nginx.conf with a few comments to point things out: error_page 404 /NotFound; error_page 500 502 503 504 =500 /InternalError; # HTTP 500 Error page declaration location / { try_files /Maintenance.html $uri @pythonbackend; } location @pythonbackend { include uwsgi_params; uwsgi_pass unix:///tmp/uwsgi.sock; } location ~* \.(py|pyc)$ { # This internal location works OK and returns my own 404 error page internal; } location /__Maintenance.html { # This one also works fine internal; } location ~* /internalerror { # This one doesn't work and returns nginx's 404 error page when I trigger an error somewhere on my site internal; } Thanks very much for your help!!

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• Redirect output of Python program to /dev/null

  - by STM

  I have a Python executable, written and compiled by somebody else, that I simply need to run once halfway down my own bash script. The program uses a text-based UI, therefore waits for input before proceeding, but the key operations it performs when starting are required in my bash script. A messy (and strange) procedure I know, but unfortunately I haven't got any other options. I've gotten around forcefully closing the program with a kill signal, but the program's TUI insists on outputting to wherever it's run. I've tried redirecting both stdout and stderr to /dev/null and running the program in the background by suffixing an ampersand, but simply can't get it to play ball. I believe the cause is the program spawns other processes, and the output redirection of the parent process doesn't affect them. Is there any trick I can utilise to redirect all output from child processes too?

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• Reliable applicance for routing IT emergency calls (SIP and ISDN)

  - by chiborg

  We have a fairly big IT installation and our IT staff needs to be reachable 24/7. At the moment we have the following setup for "emergency" calls to our IT staff on our main Asterisk box: An incoming emergency number (connected via SIP trunk and a BRI card in case the SIP trunk goes down). When the number is called during the office hours, all the SIP phones of the IT staff are called simultaneously. When the number is called out of office hours interface, a list of mobile phone numbers is called, one after another until someone picks up. The list can be changed by the IT staff via command line script. The setup works well, but the Asterisk is heavily used in a call center, has experienced some outages and misconfigurations, each of them bringing down the IT emergency number. So we'd like to put the IT emergency call functionality on a separate device. This does not need to be a big server, it even does not need to be Asterisk, it only has one purpose and should do it reliably. It should be very low-maintenance. Any suggestions for hard- and software?

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• Are there any suggestions for these new assembly mnemonics?

  - by Noctis Skytower

  Greetings! Last semester in college, my teacher in the Computer Languages class taught us the esoteric language named Whitespace. In the interest of learning the language better with a very busy schedule (midterms), I wrote an interpreter and assembler in Python. An assembly language was designed to facilitate writing programs easily, and a sample program was written with the given assembly mnemonics. Now that it is summer, a new project has begun with the objective being to rewrite the interpreter and assembler for Whitespace 0.3, with further developments coming afterwards. Since there is so much extra time than before to work on its design, you are presented here with an outline that provides a revised set of mnemonics for the assembly language. This post is marked as a wiki for their discussion. Have you ever had any experience with assembly languages in the past? Were there some instructions that you thought should have been renamed to something different? Did you find yourself thinking outside the box and with a different paradigm than in which the mnemonics were named? If you can answer yes to any of those questions, you are most welcome here. Subjective answers are appreciated! Stack Manipulation (IMP: [Space]) Stack manipulation is one of the more common operations, hence the shortness of the IMP [Space]. There are four stack instructions. hold N Push the number onto the stack copy Duplicate the top item on the stack copy N Copy the nth item on the stack (given by the argument) onto the top of the stack swap Swap the top two items on the stack drop Discard the top item on the stack drop N Slide n items off the stack, keeping the top item Arithmetic (IMP: [Tab][Space]) Arithmetic commands operate on the top two items on the stack, and replace them with the result of the operation. The first item pushed is considered to be left of the operator. add Addition sub Subtraction mul Multiplication div Integer Division mod Modulo Heap Access (IMP: [Tab][Tab]) Heap access commands look at the stack to find the address of items to be stored or retrieved. To store an item, push the address then the value and run the store command. To retrieve an item, push the address and run the retrieve command, which will place the value stored in the location at the top of the stack. save Store load Retrieve Flow Control (IMP: [LF]) Flow control operations are also common. Subroutines are marked by labels, as well as the targets of conditional and unconditional jumps, by which loops can be implemented. Programs must be ended by means of [LF][LF][LF] so that the interpreter can exit cleanly. L: Mark a location in the program call L Call a subroutine goto L Jump unconditionally to a label if=0 L Jump to a label if the top of the stack is zero if<0 L Jump to a label if the top of the stack is negative return End a subroutine and transfer control back to the caller halt End the program I/O (IMP: [Tab][LF]) Finally, we need to be able to interact with the user. There are IO instructions for reading and writing numbers and individual characters. With these, string manipulation routines can be written. The read instructions take the heap address in which to store the result from the top of the stack. print chr Output the character at the top of the stack print int Output the number at the top of the stack input chr Read a character and place it in the location given by the top of the stack input int Read a number and place it in the location given by the top of the stack Question: How would you redesign, rewrite, or rename the previous mnemonics and for what reasons?

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• backup of TFS with DPM 2007 - different backup times

  - by user46516

  I have DPM set up to back up my TFS server every 30 minutes, the reason being it's a way better interface than the quirky SQL backup interface. I also do a full backup nightly using an SQL maintenance job. My thinking is I would use DPM to restore my databases in case of losing my database and the nightly full backup would be a "just in case" the DPM restore doesn't work. I was thinking a little harder about this set up today and started to think about the fact that the DPM backup of the individual databases happens at different 30 min windows.. i.e. one happens at 13h30, another at 13h34 etc. Would this difference in time be a problem when it comes to restoring the TFS server? If I restore the databases and they are from different times, will this create corruption with pointers in one database pointing to missing items in the other database.. do the databases even rely on each other or are they completely interdependant. Lastly, how would SQL (log) backup cope with this?

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• Re-deploy only the reports on SCOM Management Packs

  - by Gabriel Guimarães

  I've migrated Reporting Services on a SCOM 2007 R2 install, and noticed that the reports have not being copied. I can create a new report, but the ones I've had because of the management packs are gone. I've tried re-applying the Management Packs however it doesn't re-deploy them and when I try to access for example: Monitoring - Microsoft Windows Print Server - Microsoft Windows Server 2000 and 2003 Print Services - State View - select any item and click Alerts on the right menu. I get the following error: Date: 12/24/2010 12:40:35 PM Application: System Center Operations Manager 2007 R2 Application Version: 6.1.7221.0 Severity: Error Message: Cannot initialize report. Microsoft.Reporting.WinForms.ReportServerException: The item '/Microsoft.SystemCenter.DataWarehouse.Report.Library/Microsoft.SystemCenter.DataWarehouse.Report.Alert' cannot be found. (rsItemNotFound) at Microsoft.Reporting.WinForms.ServerReport.GetExecutionInfo() at Microsoft.Reporting.WinForms.ServerReport.GetParameters() at Microsoft.EnterpriseManagement.Mom.Internal.UI.Reporting.Parameters.ReportParameterBlock.Initialize(ServerReport serverReport) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ReportForm.SetReportJob(Object sender, ConsoleJobEventArgs args) The report doesn't exist on the reporting services side. how do I re-deploy this reports? Thanks in advance.

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• Forcing a transaction to rollback on validation errors in Seam

  - by Chris Williams

  Quick version: We're looking for a way to force a transaction to rollback when specific situations occur during the execution of a method on a backing bean but we'd like the rollback to happen without having to show the user a generic 500 error page. Instead, we'd like the user to see the form she just submitted and a FacesMessage that indicates what the problem was. Long version: We've got a few backing beans that use components to perform a few related operations in the database (using JPA/Hibernate). During the process, an error can occur after some of the database operations have happened. This could be for a few different reasons but for this question, let's assume there's been a validation error that is detected after some DB writes have happened that weren't detectible before the writes occurred. When this happens, we'd like to make sure all of the db changes up to this point will be rolled back. Seam can deal with this because if you throw a RuntimeException out of the current FacesRequest, Seam will rollback the current transaction. The problem with this is that the user is shown a generic error page. In our case, we'd actually like the user to be shown the page she was on with a descriptive message about what went wrong, and have the opportunity to correct the bad input that caused the problem. The solution we've come up with is to throw an Exception from the component that discovers the validation problem with the annotation: @ApplicationException( rollback = true ) Then our backing bean can catch this exception, assume the component that threw it has published the appropriate FacesMessage, and simply return null to take the user back to the input page with the error displayed. The ApplicationException annotation tells Seam to rollback the transaction and we're not showing the user a generic error page. This worked well for the first place we used it that happened to only be doing inserts. The second place we tried to use it, we have to delete something during the process. In this second case, everything works if there's no validation error. If a validation error does happen, the rollback Exception is thrown and the transaction is marked for rollback. Even if no database modifications have happened to be rolled back, when the user fixes the bad data and re-submits the page, we're getting: java.lang.IllegalArgumentException: Removing a detached instance The detached instance is lazily loaded from another object (there's a many to one relationship). That parent object is loaded when the backing bean is instantiated. Because the transaction was rolled back after the validation error, the object is now detached. Our next step was to change this page from conversation scope to page scope. When we did this, Seam can't even render the page after the validation error because our page has to hit the DB to render and the transaction has been marked for rollback. So my question is: how are other people dealing with handling errors cleanly and properly managing transactions at the same time? Better yet, I'd love to be able to use everything we have now if someone can spot something I'm doing wrong that would be relatively easy to fix. I've read the Seam Framework article on Unified error page and exception handling but this is geared more towards more generic errors your application might encounter.

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• SQL Server Database In Single User Mode after Failover

  - by jlichauc

  Here is a weird situation we experienced with a SQL Server 2008 Database Mirroring Failover. We have a pair of mirrored databases running in high-availability mode and both the principal and mirror showed as synchronized. As part of some maintenance I triggered a manual failover of the principal to the mirror. However after the failover the principal was now in single-user mode instead of the expected "Principal/Synchronized" state we usually get. The database had been in multi-user mode on the previous principal before this had happened. We ended up stopping all applications, restarting the SQL Server instances, and executing "ALTER DATABASE ... SET MULTI_USER" to bring the database back to the expected "Principal/Synchronized" state in a multi-user mode. Question. Does anyone know where SQL Server stores information about whether a database should be in single-user mode or not? I'm wondering if there is some system database or table that has this setting recorded somewhere. In particular we had an incident once with the database on the original principal (the one I was failing over to) where when trying to detach the database it was put into single-user mode. I'm wondering if that setting is cached somewhere and is the reason that SQL Server put it back into single-user mode after a failover.

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• How do you add more space to a Fedora (LVM) partition?

  - by Trevor Boyd Smith

  In a nutshell, i have a VM that ran out of space. I increased the size of the VM's harddrive to be 4 times bigger but the OS partition is still only using 1x the space. I need to change the LVM partition to take up the extra 4x space but I don't know how to extend the LVM partition. (NOTE: To make the screenshots given below I had to boot from a live-cd for gnome-partition-manager (aka gparted). Very unfortunately gparted is only able to "detect LVM" and can't do any LVM operations.) Here is what "gparted" shows. Please notice that the "resize" option is not available: The Problem: I can't find good directions<1 on how to grow the LVM partition via GUI or command-line! How do you grow a LVM partition that was created by the default Fedora install? If you are giving command line directions. Please explain what each line of commands does.

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• rsync bash script to backup specific directories nightly to remote server

  - by Janice Young

  Hello, I am looking for a rsync script that will backup specific directories from my home machine to a remote server nightly. So say: /home/me/Pictures to ssh -p 6587 [email protected]/Pictures. It would be nice if it can look for changes but im not worried so much about the changes aspect is having a script that runs at a certain time of night with cron or however. I have googled and found scripts but those scripts were specific to the operations of those creators. Any help would be happily accepted as the scripted part really throws me off. Thank you, Janice

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• Home Server: cpu virtualisation, what to choose?

  - by Huygens

  I'm looking for virtualisation solutions for storage and OS for a home server. A sort of private cloud where I manage the storage space independently of the VM one. This question focus on VM (or compute instance) management and what would best suit my needs. (I have another question related to the storage management). My use cases are: A backup server: rsync and other services running. A personal cloud server: a kind of owned dropbox system, à la ownCloud. " users foreseen. A media server: streaming videos and displaying photos. Here my environement and wishes: Server: HP Proliant MicroServer with 8 GB RAM (AMD Turion dual core with AMD-V technology) OS types: only Linux (perhaps a *BSD VM in the future) Linux distributions do not matter, I'm familiar with RHEL, Fedora, Suse, Ubuntu, but any other recommandation will be fine 2-3 VMs foreseen: backup server, owncloud server and media server (optional). Those are only servers, so no graphical console needed (I don't need VirtualBox) By VM I mean a virtualised environment like KVM, Xen, etc. or a compute instance like with OpenStack storage should be "virtualised/cloudified" see my other question. VM should be able to be migrated to another server in the future if performance cannot be fullfilled anymore by the current server It does not matter if installation of such setup is complicated as long as management tools allow for easy maintenance I don't have Windows at home, so solution should be Linux friendly and would be nice to be web based. But native apps are OK too. System should be easy to enhance: by adding a new server to migate some of the VMs to it. So it's really a kind of private cloud on which I could run some Linux OS. I would prefer free (libre, as in a free speach) and open source tools. But it does not have to be free as in a free beer. So Xen, KVM, VitualBox or OpenStack? What would you recommend?

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• What requirements does an IT department work space need?

  - by Rob

  Hello all, i need to provide a list of workspace requirements to the IT director for my network operations team. So far I got Secure workspace - so nothing gets stolen and people cant come up to us asking for support (they need a ticket from the helpdesk) Quite area - so that we can work and not be disturbed by the loud project managers who play soccer in the office sometimes. A large table or desk where we can setup and or config systems and servers if needed. What else do we need? Thanks in advance.

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• Shrinking a large transaction log on a full drive

  - by Sam

  Someone fired off an update statement as part of some maintenance which did a cross join update on two tables with 200,000 records in each. That's 40 trillion statements, which would explain part of how the log grew to 200GB. I also did not have the log file capped, which is another problem I will be taking care of server wide - where we have almost 200 databases residing. The 'solution' I used was to backup the database, backup the log with truncate_only, and then backup the database again. I then shrunk the log file and set a cap on the log. Seeing as there were other databases using the log drive, I was in a bit of a rush to clean it out. I might have been able to back the log file up to our backup drive, hoping that no other databases needed to grow their log file. Paul Randal from http://technet.microsoft.com/en-us/magazine/2009.02.logging.aspx Under no circumstances should you delete the transaction log, try to rebuild it using undocumented commands, or simply truncate it using the NO_LOG or TRUNCATE_ONLY options of BACKUP LOG (which have been removed in SQL Server 2008). These options will either cause transactional inconsistency (and more than likely corruption) or remove the possibility of being able to properly recover the database. Were there any other options I'm not aware of?

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• Intermittent NFS lockups on Isilon cluster

  - by blackbox222

  We have an Isilon cluster with 8 IQ 12000x nodes which exports storage via several NFS shares for a handful of Linux and Solaris clients. There is a Linux system that has one of these NFS filesystems mounted. I/O to this filesystem is moderately heavy from the Linux system. Every 3-4 weeks (it's not on any kind of discernible schedule, and sometimes is more/less frequent than this), we notice that all activity ceases on this NFS mount (the process hangs, as if the network stopped working so process is stuck in uninterruptible sleep) - 30 minutes later, the share recovers and things continue to work normally. The kernel log from the affected machine is as follows: Dec 3 10:07:29 redacted kernel: [8710020.871993] nfs: server nfs-redacted not responding, still trying Dec 3 10:37:17 redacted kernel: [8711805.966130] nfs: server nfs-redacted OK relevant /etc/fstab line: nfs-redacted:/ifs/nfs/export_data/shared/...redacted... /data nfs defaults 0 0 I've checked to see if there are any scheduled processes e.g. cron jobs, Isilon related functions e.g. snapshots, etc that might be causing these hangups but I can't seem to find anything. I'm also not aware of any network related issues or maintenance that would cause this. All of the lockups last almost exactly 30 minutes per the kernel logs. Perhaps someone has some suggestions I could try? (I considered a soft mount to avoid the problems associated with processes accessing the filesystem hanging; however am wary of the corruption that could result and it would not really solve the underlying issue anyway).

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• Log a user in to an ASP.net application using Windows Authentication without using Windows Authentic

  - by Rising Star

  I have an ASP.net application I'm developing authentication for. I am using an existing cookie-based log on system to log users in to the system. The application runs as an anonymous account and then checks the cookie when the user wants to do something restricted. This is working fine. However, there is one caveat: I've been told that for each page that connects to our SQL server, I need to make it so that the user connects using an Active Directory account. because the system I'm using is cookie based, the user isn't logged in to Active Directory. Therefore, I use impersonation to connect to the server as a specific account. However, the powers that be here don't like impersonation; they say that it clutters up the code. I agree, but I've found no way around this. It seems that the only way that a user can be logged in to an ASP.net application is by either connecting with Internet Explorer from a machine where the user is logged in with their Active Directory account or by typing an Active Directory username and password. Neither of these two are workable in my application. I think it would be nice if I could make it so that when a user logs in and receives the cookie (which actually comes from a separate log on application, by the way), there could be some code run which tells the application to perform all network operations as the user's Active Directory account, just as if they had typed an Active Directory username and password. It seems like this ought to be possible somehow, but the solution evades me. How can I make this work? Update To those who have responded so far, I apologize for the confusion I have caused. The responses I've received indicate that you've misunderstood the question, so please allow me to clarify. I have no control over the requirement that users must perform network operations (such as SQL queries) using Active Directory accounts. I've been told several times (online and in meat-space) that this is an unusual requirement and possibly bad practice. I also have no control over the requirement that users must log in using the existing cookie-based log on application. I understand that in an ideal MS ecosystem, I would simply dis-allow anonymous access in my IIS settings and users would log in using Windows Authentication. This is not the case. The current system is that as far as IIS is concerned, the user logs in anonymously (even though they supply credentials which result in the issuance of a cookie) and we must programmatically check the cookie to see if the user has access to any restricted resources. In times past, we have simply used a single SQL account to perform all queries. My direct supervisor (who has many years of experience with this sort of thing) wants to change this. He says that if each user has his own AD account to perform SQL queries, it gives us more of a trail to follow if someone tries to do something wrong. The closest thing I've managed to come up with is using WIF to give the user a claim to a specific Active Directory account, but I still have to use impersonation because even still, the ASP.net process presents anonymous credentials to the SQL server. It boils down to this: Can I log users in with Active Directory accounts in my ASP.net application without having the users manually enter their AD credentials? (Windows Authentication)

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• Seizing naming master from child domain server

  - by meera

  when I am trying to seize the role from my child domain server the naming master I get the following error fsmo maintenance: seize naming master Attempting safe transfer of domain naming FSMO before seizure. ldap_modify_sW error 0x34(52 (Unavailable). Ldap extended error message is 000020AF: SvcErr: DSID-03210380, problem 5002 (UN AVAILABLE), data 8438 Win32 error returned is 0x20af(The requested FSMO operation failed. The current FSMO holder could not be contacted.) ) Depending on the error code this may indicate a connection, ldap, or role transfer error. Transfer of domain naming FSMO failed, proceeding with seizure ... Server "win-fb20ixk90mu" knows about 5 roles Schema - CN=NTDS Settings,CN=WIN-3918XHC5STU,CN=Servers,CN=Default-First-Site-Na me,CN=Sites,CN=Configuration,DC=HCL,DC=com Naming Master - CN=NTDS Settings,CN=WIN-FB20IXK90MU,CN=Servers,CN=Default-First- Site-Name,CN=Sites,CN=Configuration,DC=HCL,DC=com PDC - CN=NTDS Settings,CN=WIN-FB20IXK90MU,CN=Servers,CN=Default-First-Site-Name, CN=Sites,CN=Configuration,DC=HCL,DC=com RID - CN=NTDS Settings,CN=WIN-FB20IXK90MU,CN=Servers,CN=Default-First-Site-Name, CN=Sites,CN=Configuration,DC=HCL,DC=com Infrastructure - CN=NTDS Settings,CN=WIN-FB20IXK90MU,CN=Servers,CN=Default-First -Site-Name,CN=Sites,CN=Configuration,DC=HCL,DC=com

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• periodically overridding NTP for simulation purposes

  - by Gerard

  I have this situation: NTP is used to sync time on a set of Windows 7 and Server 2008 machines. Nothing out of the ordinary about this. periodically on this system, the time needs to be changed for testing/training purposes (it is a training simulation system that has a lot of time-dependent operations). My question: As NTP in general does not really like big time jumps or changes AFAIK, is there a standard way this could be set up to allow the clock to be changed at the root NTP server in the system and have it propagate through the system in a reasonable amount of time (a minute or two?) It is not acceptable to disable and/or restart all NTP client services to achieve this. Any ideas? It would be nice to do this without writing some kind of custom script to disable services and update clocks all over the place. Thanks in advance.

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• Best PerfCounters for monitoring system health of IIS, WCF, WWF and .Net for a Workflow based soluti

  - by Gineer

  We have a solution built in .Net that will be installed into a client environment. The solution will span multiple servers and be running on multiple tiers. The client makes us of MOM (Microsoft operations Manager) to monitor the system. What are the best counters to use for monitoring the overall health of the system? Are there any built in counters that we could add into a MOM Pack (as an Alert) to test a given scenario? Any thoughts suggestions would be much apreciated. Thanks

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• Plesk Backup Best Practices?

  - by The MYYN

  My client utilizes Plesk (9.X) for Server Management. We're implementing a custom backup solution, which should include a complete restorable representation of the actual Plesk configuration (Emails, Domains, etc.). We have full access, since it is a dedicated server resembling these steps: Plesk offers some backups, but they do not include the actual content of the (sub-)domains. Browsing the docs and the internet, I haven't found much ideas on that problem. Our target is to have a disaster recovery scenario: Reinstall a clean OS (Ubuntu) from scratch. Install MySQL/PHP and dependencies (since this runs the app) Install a bare plesk Restore all domains + plesk configuration from an archive Continue operations ... Now steps 1, 2, 3 and 5 are trivial. But what are the best practices for step 4? A side questions: Are there any easy-to-use open source apps out there, to create and restore server-images (even on machines with an possible different hardware)? Thanks for your time and input.

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• Access is denied while moving a file from different volumes

  - by logeeks

  i have a portable 500GB HDD plugged into my dell xps system. The system have windows 7 professional edition. the problem is that when i try to open a file(visual studio .sln file) it is saying that access is denied. I cannot copy this file to a different location(within my local HDD) it is saying that i need permission for the task to complete. I've checked and confirmed the following things 1) I've logged into an admin account before attempting these operations 2) My admin account have 'Full Control' 3) I've full control over the portable HDD 4) I changed the 'UAC' settings to 'Never notify' Please help.

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• Install and enforce a scheduled task across a Windows domain

  - by Ricket

  We have a small domain of about 70 Windows computers (XP and 7). We want to schedule a command (an update mechanism) to run on all computers periodically, and we want the task to run regardless of the computer's connection to our network (i.e. the task should run even on a laptop that isn't connected to our VPN). We have a Microsoft System Center Essentials 2010 server so that might come in handy. The options I see are these: Do it completely manually. Install the scheduled task by hand or remotely using psexec (and the at command?) for each computer in our network. Enforce that newly imaged computers should have this task installed on them before deployed to the employee, or the task should be in the image. High initial cost (having to do this for each of 70 computers) but building it into the image might work... But there is some maintenance in making sure the task is added to everything. And I fear that a year or two down the road, we will have forgotten about it or gotten sloppy or had new IT employees who miss this step and some computers won't have the task. Having one of our servers run a script that loops through all computers and psexec's the command on each computer in the network -- it would only run on running, connected computers, so this solution wouldn't work. I suspect SCE could do something like this too, but again this is not a good solution. Neither of these are ideal, and I'm certain there is a better way to do it -- right? What is the best way to accomplish this task?

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• DRBD Replication failure

  - by user62513

  A couple of weeks ago I setup a 2 nodes CRM system with one of the resources managed being MySQL over DRBD. Today for maintenance reasons I restarted both nodes but now they can't connect to each other anymore. DRBD fell out of sync and I followed this guide to get it back connected but it's only able to run successfully on one node. But this strange thing happens: If I crm node standby both nodes and I try: crm node online node0 before crm node online node1, all the CRM resources start successfully but the DRBD partitions are still running in StandAlone state. crm node online node1 beofre crm node online node0, the DRBD resource fails to start, thus causing mysql not to start. If I standby both resources and call crm node online node0 then it times out and prints this error: Running crm node online node0 produces this output after timing out Error setting standby=off (section=nodes, set=<null>): Remote node did not respond Error performing operation: Remote node did not respond Is there anything I'm doing wrong here? An alternative will be just do MySQL replication but I'm not sure how to promote a slave to master when the master database is not available.

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• Building new GIS Workstation - is it worth upgrading to a workstation GPU?

  - by bsigrist

  We are currently building a machine from scratch to act as a GIS workstation. The primary software used is ESRI's ArcGIS and we are mainly working with vector data using raster data only for contextual background imagery. In the past I have built a GIS machine and used a consumer grade gaming GPU (Nvidia 9800GT) and found it to perform fine. However, I have always wondered if I would have been better off equipping it with a workstation GPU such as a Quadro series. Would a workstation GPU make a noticeable difference doing 2D GIS operations or should I save money on the build and equip it with another 9800GT?

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• Simplest way to expose UNIX mailboxes via IMAP or POP3 on RHEL 5.6

  - by db2

  We've got a web server running RedHat Enterprise Linux 5.6, and it has all the usual local UNIX mailboxes. As is typical, the root mailbox gets all the cron output, logwatch results, etc. I'd like an easier way to keep an eye on this mailbox besides running mail via ssh. What should I install/enable to allow access to these system mailboxes via IMAP or POP3 with minimal fuss? Either protocol would be fine for what I'm doing, as I could then add it as an account in Outlook. A bit of searching led me to cyrus-imapd and dovecot, but it seems like they are meant for more serious mail hosting operations. Either they use their own mailbox system exclusively, or don't have a simple way of making the UNIX mailboxes available. If I'm wrong about that, then I'm fine with using either of them as long as I can get to the mailboxes of the existing accounts on the box.

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