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• Is Zabbix the right tool for me?

  - by hortitude

  I just want to monitor a small handful of servers (less than 10). From reading various places it sounds like the top leading contenders (for open source at least) are: nagios munin zabbix From what I have read a lot of people tend to use munin and nagios together -- munin for history and graphs, and nagios for alerting. On the other hand it sounds like Zabbix is a more complete solution and easier to configure than either of the other two. So I was thinking of going that route. My thoughts right now are: What are the general disadvantages of Zabbix? Does Zabbix have a small footprint on boxes it is monitoring? Do I really need to setup an entire other server for it? I currently have a server that is under very light load -- can I dual purpose it?

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• X58 RAID 10 - Am I forced to use Sata2?

  - by Avi

  I'm building a new dev computer. It will be running a few VMWare Worksation virtual machines. I was advised on Serverfault to use Raid10 for performance. Raid 10 uses 4 disks. I contacted my supplier who suggested a gigabyte X58A motherboard and 4 Western Digital Caviar black 6Gb/s disks. I have checked the spec for the X58A board, however, and it says: SATA 3Gb/s: RAID 0, RAID 1, RAID 5, and RAID 10 SATA 6Gb/s: RAID 0, and RAID 1. I'm losing half the bandwidth because I'm forced to use SATA2! What should I do?

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• Explorer image thumbnails are grey/incomplete/partial

  - by Craig620

  I have recently noticed a problem on my Win7 x64 Home machine. When navigating the pictures library, I run across a fair amount of thumbnails that are grey and only partially rendered. This is not not the absence of thumbnails caused by "always show icons, never thumbnails" checkbox, and is a local drive, have seen many other posts for those issues... I've run cleanmgr for thumbnails, and also manually deleted the .db files from %LOCALAPPADAT%\Microsoft\Windows\Explorer. That did actually fix one thumbnail once (while preparing this post) but in general it doesn't work. Why do specialized imaging programs not have this problem, but Explorer does? How do you fix Explorer? It's very annoying!

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• How to increase Remote Desktop resolution?

  - by BugAlert

  I'm using Windows 7 on a PC and connect to it via Remote Desktop Connection for Mac by MS, using a Mac. On the Mac, I have a 27" Display with 2560 x 1440 px resolution. The PC has a high performance graphics card (one of those that needs an additional power supply). Both machines are connected via network cable to a router. So network should be insanely fast. However, the max resolution I can get is 1400 x 1050. The PC just has a old and bad 21" monitor connected to it. How can I increase the resolution to 2560 x 1440 to work fullscreen with the Apple LED Cinema Display via Remote Desktop? Maybe I shouldn't even ask, because I already experience some lag at the low resolution of 1400 x 1050. But I guess this can be resolved as well?

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• Monitor ESXi hosts with Nagios

  - by Kyle Brandt

  Does anyone recommend any methods for monitoring ESXi 4.1 hosts with Nagios? I have looked into SNMP but it seems to be in a pretty sorry state. Net-SNMP does not seem to be included and there is a built it SNMP daemon that I set up. However from the standard MIBs there only seems to really be network interface counters and the VMWare MIBs seem quite useless. Right now I am considering SNMP for the interface speed and trying the plugins listed at http://unimpressed.org/post/96949609/monitoring-esxi-performance-through-nagios . Anyone have a better idea? I would like to monitor the hosts directly, not through something like vCenter.

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• Win 7: Are motherboard / chipset drivers part of the Software Update?

  - by Horst Walter

  Is the Windows 7 update automatically updating Chipset and motherboard drivers? I am basically talking about mainstream boards / processors (ASUS; Intel, AMD, ...), so the question reads "in general". Certainly there are exotic system not updated automatically. This is a duplicate of dangling Will Windows 7 Update Find Chipset Drivers? (one answer, no acceptance, comment directly questions the answer). I am interested in this topic as well, so I dare to ask the question again.

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• How can I compare effective power usage of two CPUs / CPU+Mobo+Mem combinations?

  - by einpoklum

  I have this server which does mostly file sharing (with the associated storage). No serious number crunching and it isn't the firewall. My current box has a Celeron D processor (Prescott 336 2.8 GHz); and I'm considering replacing it with a Pentium D (Smithfield 805 2.66 GHz) - for reasons which do not involve performance. How can I know whether one can expect a higher or lower power consumptipn for the change? And how can I estimate the power consumption for each option?

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• Static Content Caching in Sticky Session ?

  - by Ravi

  can we do Static Content caching in Sticky Session Servers. We use SqlStateServer to store the Session of the user. right now we are doing performance tuning in our application, so we decided to cache the static Content(images, css, js) for the applicaiton. so that it loads faster. Is it Good to cache the static content in Sticky Session ? If it's good, then can any one give me some links where i can read about it. right now i done following settings in my web config file <staticContent> <clientCache cacheControlCustom="public" cacheControlMode="UseMaxAge" cacheControlMaxAge="500.00:00:00" /> </staticContent> can this is the good code ? will it not affect our sticky session environment ? my goal is to cache the static images, css, Js for the application

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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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• Hard Drive upgrade advice for a Dell PowerEdge 1950

  - by user8185

  My setup is a Dell PowerEdge 1950 with 2x 140Gb Hard drives in a RAID 1 configuration. The OS is Windows 2003 Web Edition and disk is partitioned into to two, a 12Gb C: partition and the remainder is the D: drive. Both are very close to full capacity. Ideally I want to replace those drives with 2x 1Tb drives while retaining all data. First of all is this possible without rebuilding the server? If so, will I need any 3rd party software, Symantec Ghost, Partition Master for e.g., to do this? Any general advice as to how to go about doing this?

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• Windows DFS Limitations

  - by Phil

  So far I have seen an article on performance and scalability mainly focusing on how long it takes to add new links. But is there any information about limitations regarding number of files, number of folders, total size, etc? Right now I have a single file server with millions of JPGs (approx 45 TB worth) that are shared on the network through several standard file shares. I plan to create a DFS namespace and replicate all these images to another server for high availability purposes. Will I encounter extra problems with DFS that I'm otherwise not experiencing with plain-jane file shares? Is there a more recommended way to replicate these millions of files and make them available on the network? EDIT: I would experiment on my own and write a blog post about it, but I don't have the hardware for the second server yet. I'd like to collect information before buying 45 TB of hard drive space...

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• What does motherboard RAM slot colors mean?

  - by totymedli

  I always saw that the motherboard RAM slots are colored in pairs, but never know what does it means. I just put the 2 RAM in, and after a few tries it always worked. But after I tried to install a third one it always throws me a blue screen of death. Is there an order how should I install RAM to the borad? What does the colors mean? Does they indicate performance boost opportunity or are they just a guide for installation?

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• Linux Software Raid runs checkarray on the First Sunday of the Month? Why?

  - by mgjk

  It looks like Debian has a default to run checkarray on the first Sunday of the month. This causes massive performance problems and heavy disk usage for 12 hours on my 2TB mirror. Doing this "just in case" is bizzare to me. Discovering data out of sync between the two disks without quorum would be a failure anyway. This massive checking could only tell me that I have an unrecoverable drive failure and corrupt data. Which is nice, but not all that helpful. Is it necessary? Given I have no disk errors and no reason to believe my disks have failed, why is this check necessary? Should I take it out of my cron? /etc/cron.d# tail -1 /etc/cron.d/mdadm 57 0 * * 0 root [ -x /usr/share/mdadm/checkarray ] && [ $(date +\%d) -le 7 ] && /usr/share/mdadm/checkarray --cron --all --quiet Thanks for any insight,

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• How can I set deadline as the I/O scheduler for USB Flash devices by using udev rules?

  - by ????

  I have set CFQ as the default I/O scheduler. I often get bad performance when I write data into a Flash device. This is resolved if I use deadline as the I/O scheduler for USB Flash devices. I can't always change the scheduler manually, right? I think writing udev rules is a good idea. Can someone please write rules for me? I want: When I plug in a USB device, detect the type of the device. If it is a portable USB hard disk, do nothing (I think if a device has more than one partitions, it always a portable hard disk. If it is a USB Flash device, set deadline as it's scheduler.

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• Problem with screen redrawing at DOS app in VmWare Player

  - by MicTech

  I have very old DOS Application (CadSoft Eagle - PCB Designer) and I want to work with it on my workstation with Windows 7. Then I install Windows 98 and that software into VmWare Player. But that software has serious problem with redrawing screen. It's very slow in comparison with my Intel Celeron 333MHz with Windows 98. I have same problem if I try to use DOSBox on Windows XP (same Celeron 333MHz). I also trying run this application directly on Windows XP (same Celeron 333MHz) with compatibility mod set to "Windows 98", but I get "(0Dh): General Protection Fault". Can someone give me good advice how I solve that?

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• Can Windows 8 boot from FireWire?

  - by Holli

  I read many times Windows 7 is unable to boot from an external FireWire drive but I wonder if Windows 8 is able to do so. I need to run Windows on my Mac but only very few times so my idea was to move it all to an external drive. I have one of the first Intel Macs so running Windows in a virtual machine is not really fun. The performance is just too poor. Adding a Boot Camp partition to my internal drive is also not possible at the moment.

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• Cannot add Windows 7 client to SBS 2008

  - by Sandokan

  I have just installed SBS 2008 R2 Standard on VMware Workstation 9 along with Windows 7 Pro N. Both are activated and running fine. I have followed the steps to configure SBS 2008 and am now at the point where I'm to add a computer to the domain. Here is where the problem begins. I have gone through the steps of using the webinterface. On the client I downloaded Launcher.exe. I then run it and get the error "Check computer requirements - Failed" (translated from swedish): "This computer doesn't reach the requirements for connecting to the network." "The computer doesn't reach the maximum requirements for the operating system with regards to connect to the network" The provided link for More information only leads to a general supportpage and doesn't handle this specific error. I have also checked the time settings and they are correct. Any clue as to what this problem could be?

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• cannot access my own computer through My Network Places

  - by WebMAOhist

  My home Windows XP Pro SP3 machine is DHCP client receiving configurations from ISP. Trying to access in WindowsExplorer -My Network Places - Microsoft Windows Network shows Workgroup with a delay of 3 min and then popups messagebox: Microsoft Windows Network Workgroup is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions.The list of servers for this workgroup is not currently available OK I am logged-in as local machine Administrator. The internet is accessible (I am writing this post through it) The Firewall is disabled The "Computer Bowser" and all networking services, I could find, are running Control Panel -- Network Connections -- Properties (of connection) --- Internet Protocol (TCP/IP), btn Properties --- --- tab General, btn "Advanced..." -- tab WINS-- rbtn "Enable NetBIOS over TCP/IP" checked Why cannot I access my own PC (and shares on it) through My Network Places What is the possible problem? How to daignose the problem?

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• How to specify or add directory to Python.h search path during setup.py build/install

  - by ca2longoria

  I'm running Linux, and have downloaded a python module I must install without access to any but my particular /home/user directory (I have no root privileges nor the option to pursue them). This of course requires the Python source. This I've downloaded and have laying around in said user directory. While asking the admin to copy the proper files into /usr/include/python2.7 is the easiest way to go about this, I am hoping for a more general and portable solution to this kind of problem. Changing only data in the module source (MANIFEST.in, README.txt, setup.py, etc.), how might I add an arbitrary directory to the search path for Python.h and friends? (Without a solution, "python setup.py build" will continue returning with the "Python.h: No such file or directory" error) Thank you very much. (Additionally, is it acceptable to post this both here and on StackOverflow?)

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• Access Denied Error in PagesListCPVEventReceiver post SharePoint SP2 upgrade

  - by Jeff

  I am seeing the following errors from one of the SharePoint Web Front Ends after the SP2 upgrade. Has anyone else seen this error or a solution? Event Type: Error Event Source: Windows SharePoint Services 3 Event Category: General Event ID: 6875 Date: 2009-10-27 Time: 13:09:57 User: N/A Computer: XXXXXXX Description: Error loading and running event receiver Microsoft.SharePoint.Publishing.PagesListCPVEventReceiver in Microsoft.SharePoint.Publishing, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c. Additional information is below. : Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

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• Manual TRIM Windows 7 on OCZ VERTEX 2 SATA II 2.5" SSD

  - by INTPnerd

  I have an OCZ VERTEX 2 SATA II 2.5" SSD with Windows 7 Professional installed on it. I am pretty sure TRIM is not working because my motherboard is the Asus M2N-SLI (not the Deluxe model) which does not support AHCI mode for the drive. Is there a utility that is compatible with this drive that I could possibly run once a day that would do something similar to a manual TRIM in order to keep the drive performance up? I could not find one specifically for this drive on the OCZ website. I did find a User-Initiated Garbage Collection wiper tool, but it is for a Vertex drive not Vertex 2. I tried to run it, but it said that wiper could not be run for all the drives on this system.

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• what to do when ctrl-c can't kill a process?

  - by Dustin Boswell

  Ctrl-c doesn't always work to kill the current process (for instance, if that process is busy in certain network operations). In that case, you just see "^C" by your cursor, and can't do much else. What's the easiest way to force that process to die now without losing my terminal? Summary of answers below: Usually, you can Ctrl-z to put the process to sleep, and then do "kill -9 process-pid", where you find the process's pid with 'ps' and other tools. On Bash (and possibly other shells) you can do "kill -9 %1" (or '%N' in general) which is easier. If Ctrl-z doesn't work, you'll have to open another terminal and kill from there.

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• Is it wise to use SSHDs (Solid state hybrid drives) on a server?

  - by Seb

  I have a bunch of servers with very heavy I/O that currently use SATA3/SAS drives, but do suffer from I/O wait on the SATA drives, and I have just been alerted to the existence of SSHDs which cost the same for 1TB as the 1TB SATA drives that we currently use. However, previously (until Seagate shipped their first 3.5" SSHD in March) they seemed to be exclusively for Netbooks/Notebooks, which leads me to suspect they're not exactly built for the heavy I/O they'd be in for with my servers. So, would an SSHD give me a performance boost over my SATA3 drives in a heavy I/O environment (such as multiple very large high speed file transfers) or is it best to stick with SATA3 with I/O wait??

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• Google Chrome gets really slow on 10+ open tabs

  - by Anton

  For some time already I face a problem with Google Chrome. I really love this browser, but on Windows 7 on a pretty decent machine (i5, 4GB RAM) it gets REALLY slow when I open for instance 10 techcrunch.com pages. Once I do that it becomes virtually difficult to scroll through pages and the general responsiveness of the browser gets down. And if I open 20+ or 30+ tabs there is a good chance all of them will crash. Does anyone got an idea? This happens to me on several PCs with Windows 7 64bit. At 10 tabs there is 600-700MB memory used by Chrome. Two systems have the issue are both laptops with integrated graphics. One by Intel, the other an nVidia GeForce 310M.

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• When copying VM filesystem over netcat, dd copies double the disk size

  - by JivanAmara

  I'm attempting to copy the disk of a working headless virtualbox VM (VM1) on one server to a new VM (VM2) on a vCloud server. I don't have access to the host of VM2. The OS is Windows Server 2003 (32-bit) I start both VMs with a live Knoppix image. I run 'nc -l | dd of=/dev/sda bs=512' on VM2 I run 'dd if=/dev/sda bs=512 | nc ' on VM1 I previously did this with another windows VM and it worked fine. VM1 has a disk of size ~70GB (verified with fdisk); however, the amount of data dd reports read/written is ~139GB. Of course the target machine doesn't work properly. I get a Windows splash screen, then blue error screen with general 'system not working' information. I'm at a loss what could cause this. Any ideas?

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