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• why is there so much variance in prices for a 2-bay NAS?

  - by jcollum

  I'm considering buying a 2bay NAS for media storage. I'm perplexed by the variety of prices. They go from about $115 to $1200. The only thing I could see that differentiated the high end drive was encryption and a dual gigabit ethernet port. I don't understand how that can add up to $800+ dollars. Clearly I should know why there's this price variance before considering buying a 2 Bay NAS. Newegg link to 2 Bay NAS Should I move this question to serverfault?

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• Groups and Symlinks, is this safe?

  - by sjohns

  Hi, Im trying to serve similar content over two websites, but don't want to have 2 of each file, especially when they are growing. The basics, im running CentOS, with cPanel. Is it safe to do the following, I have folder downloads1 in /home/user1/www/downloads1/ i have user2, can i make a group - groupadd sharedfiles add both users to the group: useradd -g sharedfiles user1 useradd -g sharedfiles user2 then chown -r -v user1:sharedfiles downloads1/ User 2 i want to have /home/user2/www/downloads1 but i want it to be a symlink like ln "downloads1" "/home/user1/www/downloads1/" lrwxrwxrwx 1 user2 sharedfiles 11 May 9 14:20 downloads1 -> /home/user1/www/downloads1/ Is this a safe practice? Or is there a better way to do this if I want them both to be able to share the files for distribution over apache. Is there any drawbacks to this? Thanks in advance for any light shed on this. I'm not 100% sure weather this should have gone here or on serverfault.

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• Groups and Symlinks, is this safe?

  - by sjohns

  Hi, Im trying to serve similar content over two websites, but don't want to have 2 of each file, especially when they are growing. The basics, im running CentOS, with cPanel. Is it safe to do the following, I have folder downloads1 in /home/user1/www/downloads1/ i have user2, can i make a group - groupadd sharedfiles add both users to the group: useradd -g sharedfiles user1 useradd -g sharedfiles user2 then chown -r -v user1:sharedfiles downloads1/ User 2 i want to have /home/user2/www/downloads1 but i want it to be a symlink like ln "downloads1" "/home/user1/www/downloads1/" lrwxrwxrwx 1 user2 sharedfiles 11 May 9 14:20 downloads1 -> /home/user1/www/downloads1/ Is this a safe practice? Or is there a better way to do this if I want them both to be able to share the files for distribution over apache. Is there any drawbacks to this? Thanks in advance for any light shed on this. I'm not 100% sure weather this should have gone here or on serverfault.

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• Possible to use DRBD on two ESXi virtualized servers?

  - by chen

  I have two servers (attached disks have been set up as hardware RAID1 for disk device level failure resilience). Here is the setup in my mind: 1) Install ESXi on each of the physical server, M1, M2; 2) Start one VM on each of the ESXi virtualized physical server V1, V2; 3) Install the DRDB drivers within V1 and V2. Essentially, this is a "virtualizing machine running DRBD in the VM's instead of bare metal hardware" idea. My question is whether the above setup can achieve the same "networked RAID1" goal that DRDB can achieve in the bare-metal physical machines (http://www.drbd.org/). Thanks. [EDIT] I found this (http://serverfault.com/questions/49305/drbd-experimentation-and-virtualization) is a similar question, but the answer does not seem to be firmative enough for me to follow.

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• Windows VPN - NO internet access

  - by sharru

  I host a network of servers behind a Fortigate 200a firewall in the DC. I connect to those servers via a VPN connection. The problem is that when i connect to the VPN, I lose my internet connection on the local PC (windows 7). I would like to be connected to the VPN and still surf the web. i guess this means to only forward a range of ip to the VPN connection. I've read other answers on serverfault, talking about "un-check the 'Use default gateway on remote network' option in your Windows 7 PPTP network connection settings". When i do that , i get internet access but no access to the servers in the VPN. Any idea how to get both working? Should i change something on the fortigate 200a config? Do i need two networks cards? Is there a place in windows to define ip range for the vpn connection?

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• Can't access dfs namespace over vpn

  - by cpf

  Hi Serverfault, I've recently configured 2 servers in AD on the same domain level. They are physically separated and permanently connected through a site-to-site vpn for dfs replication. All well, but when users connect to either site through vpn (from home e.g.) they can't use the domain level method: \\domain.com\data Internally this works perfectly, resolving domain.com when connected through vpn gets the correct IP. I've tried Google to figure things out. What I was able to find was that more people have this issue, no real solution found though. Can anyone explain why this is happening? Especially a solution would be really helpful! Thanks in advance.

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• How can I send a Wake on Wireless LAN (WoWLAN) / Wake on Demand request manually?

  - by pioto

  This is similar to, but not the same as, http://serverfault.com/questions/1721/is-wireless-wake-on-lan-possible. I know it is supposed to be possible. The question is, how do I do whatever the AirPort Basestation will do? All I can find so far is that supposedly I need to send something with Wireless Multimedia Extensions (WMM): Basically, I want to be able to wake up my Mac Mini remotely, probably using my Linux laptop. Does anyone know of a tool to do this? Basic Wake on LAN tools do not seem to be the right thing. I don't need the Sleep Proxy Service bit, because I already know the MAC address of the system I want to wake up.

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• Route multiple subdomains on one external ip to multiple internal ips

  - by Abenil

  i have several subdomains(git.example.org, build.example.org, etc.), i have a router with an external ip and i have several virtual machines on a host computer with internal ips. Now i want to route git.example.org to internal ip 10.0.2.1 and build.example.org to internal ip 10.0.2.2. How can I do this? I setup in the Router that all traffic on port 80 is comming to my host computer with internal ip 10.0.2.3 and installed Squid on that computer. I added the following lines to the squid.conf file: cache_peer 10.0.2.1 parent 80 0 no-query originserver name=server_1 cache_peer_domain server_1 git.example.org cache_peer 10.0.2.2 parent 80 0 no-query originserver name=server_2 cache_peer_domain server_2 build.example.org But this is not working for me. :( Any help appreciated. Regards Nils Update: Here is the solution for Apache http://serverfault.com/a/273693

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• Why do some software not get load balanced even when there are multiple cores?

  - by Nav

  While VTune Analyzer was running on a blade server with 8 cores, I observed the cpu useage percentage using mpstat -P ALL 1. mpstat showed me that VTune was taking up 100% of a single core, while all other cores were idle. Why does that happen? Shouldn't the OS (RHEL Server 5.2) automatically distribute load across cores? The same happened when I tried running MATLAB (even after enabling multithreading support in the MATLAB settings). p.s: I'm a developer. Not a sys admin. So felt it better to ask here rather than at serverfault.

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• accessing files on a shared folder via IIS

  - by Darkcat Studios

  Im not sure if this suits stackexchange, serverfault or here... so i'll go with here for a start. I'm having issues setting up a network share to be accessed by IIS, all I need to do is read/write files on the Other server. We have 2 servers set up (Both 2008 R2 & IIS 7.5), one is the WEB server, which is externally accessible and NOT part of the domain. We also have an Intranet server which has no internet connectivity and is part of the domain. These 2 servers can talk to each other happily, I have the SQL server on the WEB server shared across to the intranet server so that the web content is editable from the intranet. I can share a folder on the web server (say, wwwroot/Images/) and connect to it from the intranet server, even have it as a mapped drive (but i know thats not going to work for IIS to access it), So there seems not to be a connectivity issue. I can also set up a Virtual folder in IIS on the Intranet server - this is where it gets annoying - I cant connect using pass-through authentication because there is no suitable user on the web server (which is not on the domain). If i set up a user on the web server, eg Intranet_USR, and give it appropriate rights to the folder, files and share, i can connect, but only view folder contents in IIS, not read, although that user has read privileges!! Any help much appreciated!

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• Recurring network issues the same time every day.

  - by Peter Turner

  Something has been happening on my company's network at 9:30 every day. I'm not the sysadmin but he's not a ServerFault guy so I'm not privy to every aspect of the network but I can ask questions if follow up is needed. The symptoms are the following : Sluggish network and download speed (I don't notice it, but others do) 3Com phones start ringing without having people on the other end. We've got the following ports exposed to the public for a web server, a few other ports for communicating with our clients for tech support and a VPN. We've got a Cisco ASA blocking everything else. We've got a smallish network (less than 50 computers/vms on at any time). An Active Directory server and a few VM servers. We host our own mail server too. I'm thinking the problem is internal, but what's a good way to figure out where it's coming from?

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• VMWare Workstation Dev Machine Disks: one fast or four echofriendly raid?

  - by Avi

  I'm building a new dev computer. It will be running a few VMWare Worksation virtual machines - A dev machine running VS-2010, a build machine, a version-control machine, a web server for testing, a "personal" machine running office etc. I'll be connecting the computer to my stereo, so I'll also be running iTunes (possible on a dedicated VM) and I want the computer to be a silent one. I'll probably use an Antec P183 case. I was advised on Serverfault to use Raid10 for performance. Raid 10 uses 4 disks. So, my question is as follows: In terms of heat, noise, reliability, warranty, price, capacity and performance, what would you suggest: A Raid10 4 disk array using eco-friendly disks such as the $94 1TB Western Digital Caviar Green, or one high performance disk such as the 2TB Western Digital Caviar Black at $280?

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• Direct Access on Server 2012

  - by francisswest

  Scenario: Windows Server 2012 with the Remote Access role installed. IP set to static, registered DNS. 3 domain controllers, all running Server 2003 (I suspect this may be the issue) Done so far: DNS registered, firewall turned off after IPsec was applied. Able to ping all 3 DC's with no issues Problem: Going through the DA wizard generates this error. I am logged in as a domain admin, verified that I can ping the DC, verified IPsec allows me to contact it. Since this version hasnt been readily deployed yet, there isnt much help available online from what I can find. Any assistance ayone could provide would be greatly appreciated. I am still new to the server world as far as things are considered. I would fit, user wise, between Superuser.com and serverfault.com (junior admin) Thanks to anyone who may be able to assist!

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• Is Page-Loading Time Relevant?

  - by doug

  Take this (ServerFault) page for instance. It has about 20 elements. When the last of these has loaded, the page is deemed "loaded"--but not before. This is certainly the protocol used by our testing service (which is among the small group of well-known vendors that offer that sort of service). Obviously this method is based on a clear, definite endpoint--therefore it's easy to apply w/ concomitant reliability. I think it's also the metric used by the popular Firefox plugin, 'YSlow.' For my employer's website, nearly always the last-to-load items are tracking code, tracking pixels, etc., so from the user's point of view--their perception--the page was "loaded" well before it had actually loaded based on the criterion used by our testing service (15-20% is a rough estimate). I'm sure i'm not the first person to consider this nor the first to wonder if it is causing micro-optimization while ignoring overall system-level, or user-perceived performance. So my question is, are there are other more practical (yet still reasonably precise) measures of page loading time?

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• Only ONE Outlook 2010 installation "Cannot connect to Exchange server" when setting up new profile.

  - by Johnny PDEX

  Exchange 2010, one-server installation (small production, I know not best practice) OWA Connectivity has been confirmed, Autodiscover is configured and working properly for EVERY other installation. Other user accounts tested on problem Outlook, none can connect. Windows Firewall is pre-configured by Group Policy, only modifications being related to remote management. Firewall has also been disabled during diagnostic period. Network discovery and file sharing is enabled on workstation as well. Windows 7 Professional, latest updates installed. Driving me nuts. Help, serverfault?

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• Standalone server setup for compute capacity

  - by mikera

  I'm developing an application for my company that will require a lot of compute capacity (running some very big mathematical calculations), and looking for some form of server setup to do this. For various reasons, we want to run this on-site in our office rather than hosting it externally. It's been a while since I last had to set up my own servers so I thought I would tap into the collective wisdom of serverfault! My broad requirements are: Budget $30-50k, with an aim to get as much compute capacity as possible for that budget 64-bit servers suitable to run Ubuntu Linux + Java Some relatively standalone rack that can be installed in secure office space Fast/low latency network connections between the servers, but don't really care about connectivity to the outside world Storage capacity shared between the servers - they don't necessarily need their own storage providing they can be booted from a common image Downtime can be tolerated (since the calculations are run in batch mode) The software itself is fault-tolerant, so there is no need for extra resiliency in the server setup (cheap replaceable commodity parts will be fine in general) Given these requirements what kind of setup would you recommend and why?

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• Windows 2008 Enterprise License can't activate Standard Edition

  - by starchx

  We have downloaded and installed the Windows 2008 Standard R2 edition months ago. Now the server is in production. We signed up the Microsoft Partnership Action Pack subscription last week and get a license for Windows 2008 Enterprise edtion. I am trying to activate the standard edition with Enterprise key as advsied here:http://serverfault.com/questions/318968/upgrade-domain-controller-sku-from-server-2008-r2-standard-to-enterprise , but failed. Is it because windows 2008 we have is different? (downloaded from MS site with eval license). Thanks. tim

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• High shmmax value in Redhat 6.3

  - by xpapad

  We are using Redhat 6.3 with 30G RAM to host our Postgres server. The (default) shmmax value is 68,719,476,736 In some forums I have read that having an shmmax value larger than the RAM causes extensive paging, but in the Redhat forums it warns against changing a kernel parameter that is already configured to a value larger than the minimum requirements for an environment. In ServerFault I've read that this probably has no impact. So is there any impact of having shmmax value RAM in a DB server, or the kernel understands this and handles it appropriately? Thanks

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• rsync without password, none of google (server fault) tutorials worked

  - by Jake Armstrong

  I need to use rsync for a daily backup operation and in the past (on different servers) I managed to just use a rsa key etc, but now none of google (serverfault) tutorials work at all. It keeps asking me for a password. I have webmin and ssh/root access to both servers. My steps: create a key on server 1 send key.pub to server 2 add key.pub to .ssh/authorized_keys chmod 700 .ssh/authorized_keys go back to server 1 and try rsync and it keep asking for password... rsync command: rsync -avz -e ssh file.txt root@server2:/root EDIT: well, I cleaned up everything and this time, instead of inserting a custom name to the key I used the standard one on server1. sent the .pub to server2 and it worked as a charm... So the answer is that server1's ssh wasn't even using the right key...

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• log execution of certain commands on linux

  - by jlsksr

  I have to maintain a system (debian) on which several users are allowed to install programs - so I would like to log, for example, if anyone executes "apt-get install" or "apt-get purge", so I can keep track of manually installed packages.. I'm looking for a general way to achieve this; it's not just APT, but several programs/scripts etc. Any ideas? /edit a google-search with few different keywords brought up this: http://serverfault.com/questions/201221/how-to-log-every-linux-command-to-a-logserver http://stackoverflow.com/questions/15698590/how-to-capture-all-the-commands-typed-in-unix-linux-by-any-user http://sourceforge.net/projects/rootsh/

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• Activating Sharepoint Server Publishing Infrastructure returns "Column Limit Exceeded"

  - by Haydar

  I am getting the following error when attempting to activate the Sharepoint Server Publishing Infrastructure. There are only about 140 columns defined in the entire site collection. I had previously activated and subsequently deactivated this feature. I don't know whether this might be causing the problem. But I really have no idea. I am a developer and this is my first question on serverFault. Please be gentle. Error Message: Column Limit Exceeded. There are too many columns of the specified data type. Please delete some other columns first. Note that some column types like numbers and currency use the same data type. Troubleshoot issues with Microsoft SharePoint Foundation. Correlation ID: 2ec9ae3a-5464-4922-9760-874099f51420 Date and Time: 11/8/2010 3:43:44 PMDate and Time: 11/8/2010 3:43:44 PM

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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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• 64-bit Hardware Virtualization on VirtualBox

  - by Cat

  I am trying to set up a SQL Server practice lab using VirtualBox and a trial copy of Windows Server 2K8 R2 in ISO format. I received an error message that states my processor does not support 64-bit hardware virtualization. Although I "Enabled" Intel ardware virtualization in the BIOS that still doesn't work. According to the Intel website, the processor does support VT-x, however the accelerated tab in VirtualBox is greyed out and no references to VT-x are mentioned in the settings options available to me. Any ideas on how I can get around this? I checked around ServerFault and couldn't find anything but if I missed an applicable post a link is great too. Specs below - if additional information is needed please comment and I will provide. Thanks in advance. VirtualBox version - 4.1.18 Hardware - Lenovo B570 1068-A3U i3-2310M

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• Is it possible to avoid umask 0002?

  - by Anatoly

  Is it possible to give an automatic ability to modify files(folders and all recursively) created by one user to another within one specified folder (let's say "shared") on the basis of both users belonging to the same secondary group (let's say "coworkers")? I've tried to achieve this by using ACL but with no success. Seems that umask wipes out corresponding bits.... I'm on FreeBSD 8.1 (but seems this problem is actual for other *NIX systems). Googling this problem (people often refer to it as "umask per directory" problem) gives the most relevant link: http://old.nabble.com/ACLs,-umask-and-shared-directories-td27820947.html that is not very promising... Want to ask ServerFault community - is it possible at all?

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• Window 7 not recognizing printer for driver (re)installation

  - by user55406

  OK I am having this printer problem. I had a user delete her printer. Please don't ask, I don't know. She is using an HP deskjet 6940 printer, and for her desktop she has an HP dx2400, with Windows 7. When I plug in the USB cable it should install the new drivers, but it does not. I believe you guys don't need to know my network setup. I could be wrong. If you guys here at serverfault could help that will be great. :)

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