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• Alerting when a RAID Array disk fails locally on VMWare ESX or ESXi System

  - by Tim K

  With ESX and ESXi, we recently had two systems where that the boot partition became degraded due to a failed disk. The only alert we managed to capture was the visual alert on the Dell servers. We failed to received any electronic alerts regarding the failed or degraded array. Does anyone have any experience with monitoring for these types of failures? In both cases, the servers were running in a RAID 5 SCSI configuration (5 disks on one system, 3 disks on another) which if we were running a Windows Server OS, we would have had an alert created in the Eventviewer. Where would I begin to look for this solution. Can it be configured in VCenter or vFoglight?

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• Shared storage for web cluster

  - by user52475

  Hi all! Have a big question about shared/clustered/distributed file system for storage. It will shared storage for shared web hosting (web files + maildir) and OpenVZ containers storage . Have any one working example of such system? The options are: Lustre GFS1/GFS2 - GFS2 - as I understand is EXPERIMENTAL... NFS This 3 systems which I consider for shared storage. Now I have storage with HW RAID 10 - 1TB. NFS - As I know there will be problem with locking? GFS/Lustre - problems when there will be a lot of small files , what is typical for hosting environment and problems with maildir.

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• Email server for huge number of subscriber

  - by bogha

  My question is that my company is thinking of providing a free email account for each of its customers. As a new company we will assume that our corporate email system will be MS Exchange server which will support about 1000 employees. They are asking why not adding the customer list to be a part of Exchange users. My suggestion was to separate the two systems, for the corporate we can use Exchange but for customers (around 30000) we have to use a Linux based system. My only argument was that Linux can be used for enterprise services like this and Microsoft may fail. What do you suggest? And if you are with me on choosing Linux as the server platform, what do you suggest to use as an alternative for Exchange in Linux? Thank you.

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• IPv6 in a Small Business

  - by Martyn

  I’ve been tasked to identify a new server and IT equipment for the company I work for (employees <20). I’m looking at getting a SBS 2011 Standard box. My Question is: Apart from ensuring that our router is IPv6 compliant, is there anything else I need to do/investigate to ensure that we won’t have IPv6 related problems in the future? When investigating this I can only find references to DNS Mangers etc. The SBS 2011 box will be used for exchange and remote log in access – it won’t be hosting any websites. Also will VOIP phone systems be affected by IPv6? (We are running a rather old VOIP system, would that need to be updated?

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• A space-efficient guest filesystem for grow-as-needed virtual disks ?

  - by Steve Schnepp

  A common practice is to use non-preallocated virtual disks. Since they only grow as needed, it makes them perfect for fast backup, overallocation and creation speed. Since file systems are usually based on physical disks they have the tendency to use the whole area available1 in order to increase the speed2 or reliability3. I'm searching a filesystem that does the exact opposite : try to touch the minimum blocks need by an aggressive block reuse. I would happily trade some performance for space usage. There is already a similar question, but it is rather general. I have very specific goal : space-efficiency. 1. Like page caching uses all the free physical memory 2. Canonical example : online defragmentation 3. Canonical example : snapshotting

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• How do you stop Linux from re-setting the display brightness?

  - by Shawn J. Goff

  After manually setting the display brightness on my laptop, the system re-sets the value. If the laptop is plugged in, the value is set to full brightness; if it is not plugged in, it is set to dimmer. How do I stop that behavior? Note that I am not talking about what it does in response to the event of plugging in or unplugging my system. It changes on it's own - usually several minutes after I change the brightness value. I have observed this behavior on different systems, different distributions, and different desktop environments.

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• Seeking a solution to automatically copy files from the cd-rom disk to the USB drive once it's connected.

  - by Ray Nathan

  I plan to distribute a free CD that automatically copies files to a connected usb device. This process will be done on the computers of the users that obtain the cd. The CD will contain an autorun.ini file that will instruct the computer to copy a set of files located on the cd..to a specific directory on the connected usb device. The usb drive letter is not the same on all the systems, therefore...Windows XP should automatically know the drive letter of the usb device before the copy operation begins. What would be the best way of creating a short batch file or script that I can place on the CD to execute this process? Also, please note that it is NOT feasible or recommended to include a batch file on the USB devices to sync this operation due to the explanation at the beginning of this paragraph. :) Thank You All

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• Best technique for reusing a Windows system image across configurations

  - by Martin Wiboe

  We are a small company that provides solutions for ventilation systems. Part of the solution is a "controller" which communicates with the ventilation equipment. These controllers are simply Dell computers that come with our Windows 7 system image on them and sometimes some special hardware. We typically do a batch of 10 controllers at a time. We have been using Norton Ghost to apply the system image, but this process breaks because Dell changes the system configuration often, and our Windows image now does not contain the correct drivers. This is especially a problem when they change the RAID controller. To improve this, I see 2 options: use some kind of virtualization and install a hypervisor on each PC. This would solve the driver problem, but probably cause trouble with our special hardware. use some method of adding the proper drivers to our Windows image in offline mode. I haven't got much experience in either of these approaches. How would you solve our problem?

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• How do I upgrade Django 1.3.1 to 1.4? Any tips, tutorials, or warnings?

  - by hobbes3

  Django 1.4 was recently released. Almost all the information about Django 1.4 is in the release note, but I didn't see anything about how to upgrade. Should I just remove the django folder inside Python's site-packges and download 1.4? I think I originally installed Django using emerge and yum but I'm not sure if the package management systems are up-to-date with Django 1.4 yet. That might be ok on my server instance (Gentoo Linux), but on my local instance I am using virtualenvwrapper (on Mac OS 10.7), so maybe I want to create a new Python virtual environment for Djago 1.4. Or maybe not since I don't really care about backward compatibility with 1.3.1.

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• How to troubleshoot ping request time out [closed]

  - by user28317

  I have a Windows 7 and an XP machine connected to a NETGEAR wireless router. Both machines can log into the network and surf the web. Both are connecting wirelessly. I can ping the router from each machine and get a reply. I can ping each machine from the router and get a reply. But i cannot ping each machine from the other; getting a request time out. Subnet IP Addresses are 192.168.1.* Router =1; Win7 = 10; XP = 11; Firewall is currently off in both systems. Since i can ping from router im picking that not the problem anyway. If i try to ping from xp to win7 i get Request Timed Out. If i try to ping from Win7 to Xp i get destination host unreachable. What should i do now? Thanks

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• How do I securely share / allow access to a drive?

  - by sleske

  To simplify backing up a laptop (Windows Vista), I'm planning on sharing its C: drive (with password protection) and using that to back it up from another computer. What are the security implications of this? If I share C: with a reasonable password, how big is the risk of compromise if the system is e.g. inadvertently used on a public WLAN or similar? Background: I'm planning to use [Areca Backup][1] to back up two systems (Windows XP and Vista). My current plan is to install Areca on the XP box, and share the Vista system's C: as a shared folder, so the XP system can read it. Then I can set up the drive as a network drive and have Areca read it like a local drive. Of course, if you can think of a more elegant way of doing this, I'm open to suggestions.

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• bootstraping a SparkleShare project

  - by WoJ

  I just tried SparkleShare as a possible replacement for dropbox/insynch. It looks quite promising, being based on open standards. I was wondering if someone has gone though the process of "bootstraping" a SparkleShare project. I have the initial files I would like to keep synchronized on two clients and the server (as plain files). I was wondering if there would be a way to set a project up so that I would not need to download/upload all the files back and forth (as they are readily available on all three systems). I guess this would involve some git kung-fu I am far from mastering. Thanks!

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• Postfix connection lost after AUTH

  - by user84104

  Looking at the logs on my mailservers, I have noticed messages like the following: Nov 29 12:09:38 mta postfix/smtpd[8362]: connect from unknown[183.13.165.14] Nov 29 12:09:39 mta postfix/smtpd[8362]: lost connection after AUTH from unknown[183.13.165.14] Nov 29 12:09:39 mta postfix/smtpd[8362]: disconnect from unknown[183.13.165.14] Nov 29 12:09:39 mta postfix/smtpd[8409]: connect from unknown[183.13.165.14] Nov 29 12:09:40 mta postfix/smtpd[8409]: lost connection after AUTH from unknown[183.13.165.14] Nov 29 12:09:40 mta postfix/smtpd[8409]: disconnect from unknown[183.13.165.14] There are no SASL failures in these cases. There are SASL failures are logged at other times, but never with lost connection after AUTH. What is happening here, and should I do any about it? These are not MXs, and already have smtpd_client_connection_rate_limit set. Possibly related: The systems require either SMTPS or STARTTLS before AUTH is announced.

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• What poor management decisions have you had to deal with?

  - by tombull89

  As a junior technician I've had to deal with (or will have to deal with) some problems in the past and only being a junior technician I don't have the confidence or respect from management staff to speak up. For instance, we're having a entirely new system. From Windows Server 2003/XP going to Windows Server 2008 R2/Windows 7/VMWare/Digital Signage and the current amount of time dedicated to the training of the IT support department currently stands at 0. They seem to think that all IT systems are the same and are going to get a bit of shock when I can't help them. I think there;s some UK legislation saying a school/business have to put money and time aside for training, but I'm not sure. What have you had to deal with?

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• Apache Upgrade Version

  - by mcondiff

  I have a live server that I need to upgrade Apache from 2.2.10 to 2.2.15 on Windows Server 2003. I have just inherited this server and need the fastest way to upgrade to the latest stable version without much downtime and without messing up my configuration. My first thought is to copy the httpd.conf, uninstall the current Apache, install the latest stable Apache version and then replace the httpd.conf with the previous live version. Anyone see a problem or pitfall with that? How does a Server Pro do something like this. (I'm a programmer and am new to server systems administration).

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• Exchange 2003 Event ID 9337 - Offline Address Book

  - by Creepycc

  I have a support issue with an Exchange 2003 SP2 server. Event ID: 9337 Description: OALGen did not find any recipients in address list '\Global Address List'. This offline address list will not be generated. - Default Offline Address List When you preview the Global Address list within Exchange Systems Manager all is fine. Turning off cached mode on Outllok clients still errors Public fiolders / System folders are fine OABINTEG detects no issues, Pfdavadmin has checked all DACL The GAL and OAB have been deleted / recreated several times (With differnt names) DCDIAG, NETDIAG, ExchangeBPA all run without error Exhausted Google links diagnosing this issue, any suggestions?

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• How can I VPN into a domain and act as if it is local?

  - by Duall

  I've looked and looked and the internet seems to have finally failed me, there's no information on my specific issue. I have two locations, and one server (sbs 2008); I need them to act like one physical LAN. I know it's possible, I just know how to set it up, or anything about VPNs, etc. So, just to clarify a bit more: 1 Small Business Server 2008 ~30 Computers with varying systems from Windows XP to 7 2 Physical Locations I use redirected folders, but since that would consume a lot of bandwith over VPN, I have a machine over there that can be the workhorse for storage. Users need to access e-mail and shared databases from this server (or possibly some form of DFS with aforementioned workhorse) from the other building. Is there a nice tutorial (or I nice person that wants to write it) online that can explain how to set up computers from an external network to act like they were in the LAN?

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• 1tera flop cluster?

  - by Adobe

  I want to buy a $40000 1 tera flop cluster to keep it in a room. What are the standard configurations? Cluster is supposed to do molecular dynamics simulations on biological systems. I'm proposed a 4 pc with 8 cores each by the selling company I'm deadling with. It looks like I also need infiniband. Does some one has an experience -- what phisical memory should I buy etc? I know things change very quickly... Still there might be a point or two to state. Edit: OS is supposed to be linux, application is gromacs.

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• windows 7 frequently crashes when running 64 bit debian on virtualbox

  - by erin c

  I've been having some hard times with Virtualbox. I use it to run 64-bit Debian guest on a Windows 7 host to be able to code for linux systems. It generally crashes when I build my code in eclipse cdt, or if I am doing some intensive operations. Should I lower the memory and core usage? Is this some sort of virtualbox problem? I upgraded to virtualbox v4.1.8 and the problem still occurs. My virtual machine instance uses 1736MB out of 4GB of ram, and I use 2 out of 8 processor cores. But still, the whole thing crashes 1 or 2 times every single day.

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• Disable NSS LDAP IPv6 (AAAA) lookups

  - by pilcrow

  Question: How can I disable inet6 AAAA queries for my LDAP server during (LDAP-backed) NSS lookups on a CentOS (RHEL) 5 machine? Background: I've servers configured to consult ldap://ldap.internal for NSS passwd and group lookups. Every relevant NSS lookup, for example the getpwuid(3) implied by an ls -l which needs to translate UIDs to network user names, performs the following DNS dance before connecting to the ldap server: AAAA? ldap.internal -> (no records) AAAA? ldap.internal.internal -> NXDomain A? ldap.internal -> 192.168.3.89 I'd like to skip the first two queries completely. Configuration: [server]$ cat /etc/redhat-release CentOS release 5.4 (Final) [server]$ grep ^passwd /etc/nsswitch.conf passwd: files ldap [server]$ grep ^uri /etc/ldap.conf uri ldap://ldap.internal/ For what it's worth, IPv6 support is otherwise disabled on these systems: [server]$ grep off /etc/modprobe.conf alias ipv6 off alias net-pf-10 off [server]$ echo "$(ip a | grep -c inet6) IPv6-enabled interfaces" 0 IPv6-enabled interfaces

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• Virtualbox and getting the Locked VT-x Error when trying to use more than 1 processor on the session

  - by Dave

  I have installed the latest version of virtualbox onto my Hewlett Pakard (h8-1170uk) I have a intel i7 2600 cpu and 8 gb of ram I can get virtual box to create several sessions of different operating systems at the same time, but whenever i try to get 1 session to open up using more than 1 processor option select ( i wanted one of my session access to 2 processors ) i keep getting this error message VT-x features locked or unavailable in MSR. (VERR_VMX_MSR_LOCKED_OR_DISABLED). Result Code: E_FAIL (0x80004005) Component: Console Interface: IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb} I have search many times and cannot find a option to correct this. I have check my BIOS and there are no options about VT-x or Virtualisation or anything. Am i doing something wrong ? Why does Virtualbox run fine when just using the 1 processor option ?

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• end_request: I/O error, dev sda, sector xxxxxxxxx

  - by muruga

  I have a IBM server. This server contains 3 hard disk with RAID 5. It was working fine earlier. Unfortunately this machine got the following error message. After that I have rebooted the systems. After that I am getting the following error message in kern.log and demsg kernel: [65896.678870] end_request: I/O error, dev sda, sector 17430271 kernel: [69263.783957] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK : [69263.783957] sd 0:0:0:0: [sda] Sense Key : Hardware Error [current] kernel: [69263.783957] sd 0:0:0:0: [sda] Add. Sense: Internal target failure Whether it is kernel problem or hard disk problem or Raid problem

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• Routers with USB plug to connect external storage

  - by sixtyfootersdude

  I am just about to buy a new wireless router. I want to be able to hook up a harddrive to it and let the harddrive serve the entire network. I will mostly be storing media and some backups on the drive. I know I could get some kind of NAS but I would prefer to just hook up one of my many unused hard drives directly to my router. It looks like d-link has several products that do this using shareport. If you were wanting to have network storage how would you do it? With a NAS? Using a router with a USB port. Are these systems robust? What router would you buy?

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• Why not install Msvcr71.dll into system32?

  - by hillu

  While looking for an authoritative source for the missing Msvcr71.dll that is needed by a few old applications, I stumbled across the MSDN article Redistribution of the shared C runtime component in Visual C++. The advice given to developers is to drop the DLL into the application's directory instead of system32 since DLLs in this directory are considered before the system paths. What can/will go wrong if I (as an administrator, not a developer) decide to take the lazy path and install Msvcr71.dll (and Msvcp71.dll while I'm at it) into the system32 directory (of 32 bit Windows XP or Windows 7 systems) instead of putting a copy in each application's directory? Is there another good solution to provide the applications with the needed DLLs that doesn't involve copying stuff to the application directories? added after first answers: I understand that incompatible API changes may have been made to the mentioned DLLs, but pretty much every mention of incompatibilities I have found using Google had to do with games or video codecs. Right now, I expect that the risk of breakage is pretty small. Am I missing something?

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• Can I run Linux on the HP Mini from Verizon Wireless, with a built-in 3G modem, and connect using the built in modem?

  - by Parker

  I apologize if my question made little sense, I am very tired at the moment. Anyway, Recently I purchases the HP Mini from Verizon Wireless. It runs on the Intel Atom processor and came with Windows 7 Starter Edition, which is quite possibly the worst and most restrictive OS I have ever used. I plan on installing CRUX, after doing a little research on minimal, free, Linux operating systems, as I am working on web programming using Python, among other things. My only worry is that, because my HP Mini uses a built in wireless card (and I have no wifi connection, only a 3G connection) that has a "mobile access" connection to Verizon wireless, I am not sure if after installing CRUX that I would still be able to connect using this option. I have never used Linux before, and am hoping this will work. So if anybody has experience with this...please answer, can I connect to vzw 3G with linux, using an internal mobile access card...

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