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• Upgrade no raid server to raid

  - by AZee

  I have just learned that our PDC has a single drive with 2 partitions. I also know that this drive has bad blocks as recorded in the event log. What I would like to do is to convert this to a RAID solution with a nice balance between economy and performance. I will admit that I have only configured servers with RAID from scratch, and have no experience upgrading an existing system into a RAID system. In fact, I'm not sure it is even possible. Since this is the PDC for 350+ workstations downtime is important. I'd like to hear from other System Administators how they would tackle this and their recommendations for all devices. At this time it seems to me that I can replace the existing drive and then restore from backup or install a controller, drives, configure the RAID an basically start from scratch. Thank you for taking your time. ~AZee

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• My NTFS Partition keeps becoming "unusable" on Ubuntu, Any Ideas?

  - by gopherman

  I just purchased a new 2TB Drive External Seagate, My main system uses both Windows and Ubuntu So I am pretty much stuck with keeping my drive as NTFS. I have done this without any problems before but since I got this new drive I have been having issues. When I first load up Ubuntu the drive mounts and runs fine, after an unspecified amount of time i start getting Input/Output errors when accessing the drive. When I goto the Disk Utility I get a message stating the drive is "Unknown or Unused", If I disconnect and reconnect the drive or reboot everything is fine again. There's no errors coming up with S.M.A.R.T and it seems to work fine while under windows. Any thoughts?

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• My NTFS Partition keeps becoming "unusable" on Ubuntu, Any Ideas?

  - by gopherman

  I just purchased a new 2TB Drive External Seagate, My main system uses both Windows and Ubuntu So I am pretty much stuck with keeping my drive as NTFS. I have done this without any problems before but since I got this new drive I have been having issues. When I first load up Ubuntu the drive mounts and runs fine, after an unspecified amount of time i start getting Input/Output errors when accessing the drive. When I goto the Disk Utility I get a message stating the drive is "Unknown or Unused", If I disconnect and reconnect the drive or reboot everything is fine again. There's no errors coming up with S.M.A.R.T and it seems to work fine while under windows. Any thoughts?

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• BES 5.0 and MAPI calls to exchange system

  - by nysingh

  We have been using BES 4.1(5) for a while now and it has been a resource hog on exchange due to high number of MAPI calls. I have heard that BES 5.0 is even worse. the comparison i heard is that BES 4.1 is makes MAPI calls equal to 5 outlook clients per BB user and BES 5.0 makes MAPI calls equal to 10 outlook clients per BB user. can someone confirm if it is true? is BES 5.0 is really that bad in MAPI calls and for exchange performance. ? thanks

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• slow disk writes between host and guest

  - by Jure1873

  I've got a ubuntu (server kernel) on a amd x4, 4gb ram, 2x seagate sata 1 tb disks for testing virtual machines and the write performance is very slow. The two disks are in a software raid1 array, one small boot ext3 partition, 10gb system partition and the rest is a xfs partition (about 980) gb for data (virtual machines). If I'm copying files from the virtual machine to the host with rsync or scp the copy frequently stalls or goes at about 1mb/s. What's wrong? I've tried disabling barriers on xfs, increased logbufs, allocsize, but it seems nothing helps. The strange thing is that await (for example during copying) for sda is usually under 100, while for sdb is around 400. Any ideas on what could be wrong / what could I do to improve this setup?

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• Server downtime - are these APC warnings the cause?

  - by DisgruntledGoat

  Yesterday I had a problem with my dedicated server (Ubuntu 10.04, LAMP). It wasn't down per se, but running incredibly slowly as if we had a massive overload of visitors (though I don't think we did). It's running smoothly again now. I've been checking through log files etc to see if I can find any issues, the only strange thing is a bunch of these errors, occurring at about the same time as the downtime: [apc-warning] Unable to allocate memory for pool. in [file] on line 49. And a bit later on: [apc-warning] GC cache entry '[file1]' (dev=2056 ino=8988092) was on gc-list for 3601 seconds in [file2] on line 746. Could these errors indicate the cause of the server slowdown, or are they simply a result of the server being slow in the first place? What would be the solution?

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• Both screens always stay on after adding second monitor

  - by J.Merrill

  I had a single 1920x1080 monitor on a Windows 7 desktop PC and, per "power management" (not screen saver), the screen would go blank after 10 minutes. I added another monitor (2560x1600 if that matters) and since then, neither screen has ever blanked. I've tried turning on the "blank" screen saver, but that didn't help either -- I can go away for hours and when I come back, both screens are on. I've seen others with similar issues apparently caused by e.g. wireless mice that seem to move infinitesimally, but I've got the same wired mouse I had before. I can't understand why neither the screen saver nor power management is doing what it should to blank the screens, when "power management" used to do it when there was only one monitor. Maybe it doesn't matter so much with current LCD display technology (no "burn in") but doesn't a monitor use more power when "power management" hasn't turned off the display? Thanks for any suggestions.

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• Slow Inserts SQL Server 2005

  - by Achilles

  I'm researching an issue with the following information: We had a logging table with about 90k records in it that had inserts taking several seconds(approximately 10 to 20s) in extreme cases. One of the columns of the table stores XML as the XML datatype. The XML isn't being parsed during the insert, just stored. We tried truncating the table assuming that the issue was related the number of records(althought 90k seemed "normal") and the inserts still are performing poorly. While I know there are other issues that can cloud the issue, what would be some "check this first" ideas that could help me debug this issue? Thanks for any suggestions and help in advance.

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• Virtualbox, merging snapshots and base disk

  - by Henrik

  Hi, I have a virtual machine with about 30 snapshots in branches. The current development path is 22 snapshots plus the base disk. The amount of files is seemingly having an impact now on IO and the dev laptop I'm using (don't know if it is host disk performance issues with the 140GB total size over a lot of fragments, or just the fact that it is hitting sectors distributed across a lot of files). I would like to merge the current development branch of snapshots together with the base disk, but I am unsure if the following command would produce the correct outcome. I am not able to boot this disk after the procedure completes (5-6 hours). vboxmanage clonehd "C:\VPC-Storage\.VirtualBox\Machines\CRM\Snapshots\{245b27ac-e658-470a-b978-8e62137c33b1}.vhd" "E:\crm-20100624.vhd" --format VHD --type normal Could anyone confirm if this is the correct approach or not?

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• Pages partially load on rapid refresh

  - by user101570

  I recently set up a VPS slice with 256MB to run a LAMP stack (Ubuntu 11.04, Apache2, Mysql, PHP5). So far I'm only running a simple Wordpress site on an IP-based virtual host I set up. The performance is excellent, but I've noticed that if I send multiple HTTP requests from the same IP in a short time period, only partial pages are rendered. Then if I wait a bit and refresh the page, the entire page loads again. I noticed this behaviour when accessing the site from two browsers from my office desktop, but it also presents itself if I quickly navigate the site from a single browser (any browser). I'm guessing this is an Apache phenomenon, as the pages are rendered correctly except under the conditions above, but perhaps I'm wrong here. Could it be my hosting company with some kind of DOS protection in place? As a relative Linux/server noob, I'd really appreciate any insight into what settings in Apache could explain this behaviour, and how I might go about changing it.

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• Will SSD degrade when running VMWare Workstation from SSD?

  - by Andrey Botalov

  My main OS (Windows 7 or 8) is runned from SSD. I'd want to run Mac OS X 10.7 or 10.8 using VMWare workstation. I've heard that VMWare doesn't support TRIM and other things to optimize SSD usage. So SSD will quickly degrade if VM will be runned from SSD. Will it be better to put guest OS's files (.vmdk and the rest) to external HDD (connected through USB 2 or 3) instead of SSD? What advantages and disadvantages it will give? What if VM will be put to internal HDD? At what drive type performance of VM will be better?

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• consulting a network admin for rails and php applications

  - by Karo Devos

  Hi I'm a web developer who writes most of the time rails applications. Next month I'm going to switch from my current VPS to linode. I'm wondering how much it would cost to properly set (or teach me how to do it) everything to get my app up and running. My requirements are probably: nginx/apache, REE/ruby, passenger, full blown php environment, system wide RVM, search engine such a sphinx, being able to perform cronjobs. I have some knowledge of unix and I was able to install everything I needed on my development system. However I had quite a few issues setting up everything on my production server.

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• Mitigating the 'firesheep' attack at the network layer?

  - by pobk

  What are the sysadmin's thoughts on mitigating the 'firesheep' attack for servers they manage? Firesheep is a new firefox extension that allows anyone who installs it to sidejack session it can discover. It does it's discovery by sniffing packets on the network and looking for session cookies from known sites. It is relatively easy to write plugins for the extension to listen for cookies from additional sites. From a systems/network perspective, we've discussed the possibility of encrypting the whole site, but this introduces additional load on servers and screws with site-indexing, assets and general performance. One option we've investigated is to use our firewalls to do SSL Offload, but as I mentioned earlier, this would require all of the site to be encrypted. What's the general thoughts on protecting against this attack vector? I've asked a similar question on StackOverflow, however, it would be interesting to see what the systems engineers thought.

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• OS X: What does the '@' attribute on a file mean?

  - by claytontstanley

  On a Snow Leopard machine, at the Terminal: la ~/src/rmcl/ | grep RMCL -rw-r--r--@ 1 claytonstanley staff 6766167 Nov 13 2009 RMCL What is that '@' attribute? This file is part of an older OS X program that runs under Rosetta. I'm having issues where some older programs running under Rosetta require the @ attribute when opening files. But I'm not sure what that attribute is, so I have no way to know how to add/remove it. I did try a thorough Google search on this, but I wasn't able to find the answer. I would have thought this would be an easy one to find. Maybe the Google query isn't acting properly because of the single @ special character. Any info. is much appreciated. Thanks!

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• Using iTunes within Terminal Services 2008 R2 - Pitfalls etc

  - by Kristiaan

  I was hoping to get some further information on any possible Do's and Don't when it comes to installing, using and maintaining iTunes within a Termina Server environment. We have come across a situation in our company whereby some of our users who are using thin clients now need the ability to sync, update and manage their devices, previously they used either standard desktop systems or laptops so there was no issue with running iTunes. I have not found much information on the web about using iTunes within a Terminal Server Farm, Id like to find out if iTunes works within the environment, any known or common issues that occur due to running it like this.

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• Windows 7: blue faces in VLC... sometimes

  - by Mala

  There are a bunch of forum posts about this issue from the last several years but no resolution that I could find. I have the newest VLC installed on Windows 7 with the newest nvidia drivers. Suddenly, VLC plays some videos in such a way as faces are blue. When viewed in another media player, or when looking at the thumbnails, this is not an issue. Other videos are not affected. I've tried resetting VLC options, deleting the VLC folder in the AppData area, etc. I have no other color issues. Does anyone have a fix?

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• Finding Locked Out Users

  - by Bart Silverstrim

  Active Directory up to 2008 network (our servers are a mix of 2008, 2003...) I'm looking for a quick way to query AD to find out what users are locked out, preferably from a batch or script file, to monitor for possible issues with either user accounts being attacked by an automated attack or just anomalies in the network. I've Googled and my Google-fu has failed; I found a query off Microsoft's own knowledgebase that cites a string to use on Server 2003 with the management snap-in's saved queries (http://support.microsoft.com/kb/555131) but when I entered it, the query returned 400 users that a spot-check showed did NOT have a checkmark in the "Account is locked out" box under "account." In fact, I don't see anything wrong with their accounts. Is there a simple utility (wisesoft bulkadusers apparently uses this method behind the scenes, since it's results were also wrong) that will give a count of users and possibly their user object names? Script? Something?

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• routing weirdness - traceroute 'vanishes' en route

  - by The Journeyman geek

  I'm attempting to set up one of my boxes as a server (again), but i'm having some odd connection issues- the box itself connects fine to the internet, but trying to connect to my external ip address seems to result in the trace getting 'lost' partway. http://pastebin.com/HCQAGbvn - this is a traceroute from another system that's connected to another ISP - starhub is my own one, while i have another system that i have access to on singtel. I'm wondering if my ISP is messing around with routing, or is something very odd going on. As you note, the traceroute dosen't reach me, but if it helps, i use a dd-wrt router. edit: Facepalmishly, turning the firewall on my router on and off fixed it. I don't get why it dropped off at different ip addresses each time, or why the router set it self to block.. everything, or why it affected the ipv6 tunnel as well.

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• How do I set the TEMP environment variable for the "Network Service" user?

  - by Chris Phillips

  We have a system that uses Path.GetTempFile and Path.GetTempPath calls to work with temporary files fairly frequently. This system also runs as the "Network Service" user. We're finding that we're running out of room on the C drive (for other issues, our temp files are cleaned up correctly) and would like to be able to move the temp directory to a different drive. The easiest solution to this seems to be to change the TMP or TEMP environment variables for the Network Service user, but I only seem to be able to set my own user or the "system" variables that are overwritten by the Network Service user profile. How do I set these variables for the Network Service user?

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• How to get the spec of a machine on Linux?

  - by machinePurchaser

  I am interested in getting the spec of a machine, because I am thinking getting a similar server. What I am mostly interested in knowing is the number of cores / CPUs / etc., the amount of memory, the speed of the CPUs, the CPU cache size, and any other detail which is important for performance. My question is two-fold: Which parameters should I be interested in other than the ones I specified above? Is there an easy way to read them off the machine in Linux? cat /proc/cpuinfo reveals a lot about the CPUs, for example... What about memory (would rather not rely on top), etc?

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• How to use chain.p7b with Apache?

  - by Debianuser

  I wanted to setup a SSL website on Apache and applied for a certificate from my local ISP. All they sent me was a single file named chain.p7b. I have always used certificates from other vendors without any issues but they usually provide two files to be configured as SSLCertificateFile and SSLCertificateChainFile in Apache. Following instructions from several online resources, I opened the p7b file in Windows and extracted 4 certificates from the file. I then tried configuring Apache with one of the files and it worked, but shows a warning: The certificate is not trusted because no issuer chain was provided. I though I have to use remaining 3 files as SSLCertificateChainFile and/or SSLCACertificateFile. I tried that but it didn't work so I am assuming it might be something completely different. Anyone faced this issue before? The following page http://www-01.ibm.com/support/docview.wss?uid=swg21458997 talks about using a keystore but is that relevant to Apache?

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• Can't use HTTPS with ServerXMLHTTP object

  - by Imraan

  I am supporting a Classic ASP application that connects to a payment gateway via HTTPS. Up until recently there have been no issues. A few days ago this broke without the code, IIS config or anything local changing. Its broken on at least 3 separate servers. The last run of Windows Updates was in late November, but bringing the servers' updates up date has not resolved the problem. A code snippet is below. Dim oHttp Dim strResult Set oHttp = CreateObject("MSXML2.ServerXMLHTTP") oHttp.setOption 2, 13056 oHttp.open "POST", SOAP_ENDPOINT, false oHttp.setRequestHeader "Content-Type", "application/soap+xml; charset=utf-8" oHttp.setRequestHeader "SOAPAction", SOAP_NS + "/" & SOAP_FUNCTION oHttp.send SOAP_REQUEST Below is a dump of the error object :- Number: -2147012852 Description: A certificate is required to complete client authentication Message: A certificate is required to complete client authentication I initially posted the question on Stackoverflow (http://stackoverflow.com/questions/9212985/cant-use-https-with-serverxmlhttp-object) thinking it was a code issue, but further investigation seems to point to a server issue.

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• Sudden slow read & write speed on all IO

  - by user23392

  I have a custom built rig that has 2 storage drives. for OS: Western Digital 1.0TB HARD DR 64MB for other stuff: Corsair Performance 3 128GB (SSD) [ expected read speed: 400 mb/s ] The system was incredibly fast for a couple of months, then one day i was playing a game then it started to get buggy (some sounds and objects disappearing), i stopped the game and the system seemed to be unstable so i had to shut it down, next morning i couldn't start it up, it was saying something about corrupt device. I formatted both disks and installed a fresh copy of windows, all i can say that since that day the system was never like before, it takes 10 minutes to boot up (the icons and desktop slowly appear). but once it's done the slowness isn't as noticeable. Here's my benchmark on the HDD ( read speed - write speed ): And the SSD: Anyone knows what could be the issue?

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• Windows 2008 RC2 IIS6 SMTP Virtual Servers - Limited to 4

  - by webnoob

  In line with this post: http://www.hugheserblog.com/2012/05/22/error-creating-iis-smtp-virtual-servers/ I am receiving the same issues: When we tried to add more than 4 IIS SMTP virtual servers, we got the error within IIS, “The system cannot find the path specified.” This post is almost 2 years old and my server is up to date with Windows updates so I assumed it would be fixed already. Does anyone know if I need to do something special (ie. contact Microsoft) to get a special fix for this? The information in the post suggests it should have been included in an update.

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• how to debug BSOD irql_not_less_or_equal error

  - by Sev

  So I'm getting the irql_not_less_or_equal BSOD. I tried looking at the event viewer for potential causes, and cannot find any. I also checked the CPU temperature in BIOS right after the error and that was fine. I've tried 2 sets of RAM chips already, both give the issues. The error doesn't happen consistently...it happens daily, but many hours can pass and it won't happen, or only 10 minutes can pass and it might happen again. By the way, just bought the parts and built the computer myself a couple of weeks ago. How to debug the cause for this? Hardware info: Asus P6X58D PREMIUM motherboard Intel core i7 930 quad core 2.8 ghz Kingston 128 GB SSD 3 Gb/sec Nvidia Geforce GTX 465 PNY Edition Corsair 12 GB DDR3 1600 Mhz Ram Windows 7 Ultimate

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