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• SAS instead of SATA 2 for my hard drives?

  - by jasondavis

  I am building a new system soon, I will have multiple 1-2tb hard drives for storage in it. I only have experience uasing the sataII drives but I saw somewhere that I should be using something like SAS? I read that if I were going to have 20 drives that I could use 4 SAS cables vs 20 SATA cables. Can someone help me understand this better? If it were only 4 cables then how would 20 drives hook up? Also can a regualr sata2 drive hook up to that?

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• Best way to replicate servers

  - by Matthew

  I currently have two servers both with linux software RAID1 configurations. They use heartbeat and DRBD to create a shared DRBD device that hosts a a exported NFS directory. The servers run Ubuntu Server with a LXDE GUI and some IP These servers are going to be placed on fishing vessels to act has redundant storage for IP cameras. My boss wants me to figure out the most efficient way to create these servers. We might be looking at pushing out several systems a week. Each configuration will be almost identical besides IP addressing. What would be the best method to automate the configuration process? We are trying to cut down on labor costs to set these up. Imaging and Proceeding are both on my mind right now

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• Distribute terrabyte files to the public from web server

  - by MarkJ

  Hi We need to set up a website which makes two or three large files publicly available - the files will be 1 or 2 terrabytes each. Although they will be public, in practise I expect only a relatively small number of scientists will want to download them. What is the best way to allow this? I've had a quick talk to a web-hosting provider (rackspace) and they suggested a hybrid solution. An entry-level managed server (we predict fairly low traffic for the website, but we do need to install some custom CGI software). Some cloud storage which hooks into Limelight Networks. This would host the large files, for download by FTP. It sounded OK to me but I know relatively little about server administration. Does it make sense? Thanks in advance, Mark

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• HDD situation - what would be best - data and backup

  - by Sam Johnson

  I just installed W8 on an Intel 330 180 GB SSD. I have 3 1TB HDDs. 1 HDD will be external for backup. 2 HDDs are then available for my PC. I do not need 2 TB of storage, so I thought I'd set these up to be exact clones of one another, so that if one dies I have a backup in the computer to go along with my external. Is this a good set up? How best would this be accomplished? I've heard people suggest RAID but I've never done RAID, have no idea what it is, and have no idea how to set it up in my BIOS. Thanks in advance

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• Mounting root failed. Dropping into basic maintenance shell

  - by vmsystem

  Hi, I have purchased AMD Phenom X4 955 3.2GHZ processor with supporting gigabyte GA-MA785GM-US2H mother board / 6GB DDR2 RAM / 500GB SATA drive for learning Vmware ESX 3.5 product. In the above configuration, I have installed windows xp 64 bit operating systems and continue to installed vmware workstation 6.5. From the VM workstation, I can able to install ESX3.5 update2, but I unable to start properly, please refer the below mention error. “Mounting root failed. Dropping into basic maintenance shell. To collect logs for VMware, connect a USB storage device and run 'bin/vm-support '. Machine will be rebooted when you exit from this shell.” The same was tested in the windows 2003 Enterprise Edition server / windows 7 32bit / windows 7 64bit also, Please help me to resolve the issue.

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• Recommending simple appliance for DansGuardian, iptables, snort inline

  - by SRobertJames

  I'm currently using a Linksys E2000 with dd-wrt. I'd like to add DansGuardian for Content Filtering and snort-inline for IPS; but those require a more powerful box (mainly, more storage). Can you recommend a good device to use? I'm open to both overwrite-the-firmware (like dd-wrt) and designed-to-be-customized boxes. Requirements: 1. 5+ Ethernet ports, pref. GigE 2. small form factor 3. No noise (office environment) 4. low power 5. Not sure about 802.11 wireless Budget < $400, pref. less.

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• Archive Outlook mail items into SQL Server

  - by marc_s

  I am looking (and so far not finding any) for a solution to archive e-mail items from my Outlook into SQL Server. My PST is beginning to get really really big, and I'd love to extract my older e-mail into SQL Server in a way so I can still easily find mails if needed. I would prefer SQL Server as the storage medium since I'm familiar with it, and it's rock solid - I don't want to have a collection of PST files or CHM files or anything like that. Does anyone know of such a solution? I'm a power/home user - I can't afford $5'000 enterprise licenses - I need a sub-$100 solution for private use.

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• What are performance limits of a database?

  - by Tommy

  What are some rough performance limits (read/s, write/s) for a single database server (no master-slave architecture), assuming storage on disk? How many read/s, write/s, depending on the kind of disk? (SSD vs non-SSD) , assuming simple operations (select one row by primary key, update one row, correctly indexed). I assume this limit is dependent on disk seek/write. EDIT: My question is more about getting rough metrics of the number of operations a database supports: to be able to know for example, if a new feature triggering 300 inserts/s can be supported without scaling out with additional servers.

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• Best way to convert from IMAP to POP3?

  - by Brad

  At work, I connect to a corporate Exchange server via IMAP and Thunderbird 3. Over the course of a year or so, I've created quite a few folders on the server and have a lot of mail stored there. I'm hitting the storage limit of my mail account and want to convert to pulling mail down to my local box (running Linux) via POP3. I know that polling mail will only get mail in INBOX, but I'm wondering if there are solutions out there that could be used to pull mail from the other folders as well, or am I doomed to moving mail into the inbox manually and polling over and over again?

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• jQuery - I'm getting unexpected outputs from a basic math formula.

  - by OllieMcCarthy

  Hi I would like to start by saying I'd greatly appreciate anyones help on this. I have built a small caculator to calculate the amount a consumer can save annually on energy by installing a ground heat pump or solar panels. As far as I can tell the mathematical formulas are correct and my client verified this yesterday when I showed him the code. Two problems. The first is that the calculator is outputting ridiculously large numbers for the first result. The second problem is that the solar result is only working when there are no zeros in the fields. Are there some quirks as to how one would write mathematical formulas in JS or jQuery? Any help greatly appreciated. Here is the link - http://www.olliemccarthy.com/test/johncmurphy/?page_id=249 And here is the code for the entire function - $jq(document).ready(function(){ // Energy Bill Saver // Declare Variables var A = ""; // Input for Oil var B = ""; // Input for Storage Heater var C = ""; // Input for Natural Gas var D = ""; // Input for LPG var E = ""; // Input for Coal var F = ""; // Input for Wood Pellets var G = ""; // Input for Number of Occupants var J = ""; var K = ""; var H = ""; var I = ""; // Declare Constants var a = "0.0816"; // Rate for Oil var b = "0.0963"; // Rate for NightRate var c = "0.0558"; // Rate for Gas var d = "0.1579"; // Rate for LPG var e = "0.121"; // Rate for Coal var f = "0.0828"; // Rate for Pellets var g = "0.02675"; // Rate for Heat Pump var x = "1226.4"; // Splittin up I to avoid error var S1 = ""; // Splitting up the calcuation for I var S2 = ""; // Splitting up the calcuation for I var S3 = ""; // Splitting up the calcuation for I var S4 = ""; // Splitting up the calcuation for I var S5 = ""; // Splitting up the calcuation for I var S6 = ""; // Splitting up the calcuation for I // Calculate H (Ground Sourced Heat Pump) $jq(".es-calculate").click(function(){ $jq(".es-result-wrap").slideDown(300); A = $jq("input.es-oil").val(); B = $jq("input.es-storage").val(); C = $jq("input.es-gas").val(); D = $jq("input.es-lpg").val(); E = $jq("input.es-coal").val(); F = $jq("input.es-pellets").val(); G = $jq("input.es-occupants").val(); J = ( A / a ) + ( B / b ) + ( C / c ) + ( D / d ) + ( E / e ) + ( F / f ) ; H = A + B + C + D + E + F - ( J * g ) ; K = ( G * x ) ; if ( A !== "0" ) { S1 = ( ( ( A / a ) / J ) * K * a ) ; } else { S1 = "0" ; } if ( B !== "0" ) { S2 = ( ( ( B / b ) / J ) * K * b ) ; } else { S2 = "0" ; } if ( C !== "0" ) { S3 = ( ( ( C / c ) / J ) * K * c ) ; } else { S3 = "0" ; } if ( D !== "0" ) { S4 = ( ( ( D / d ) / J ) * K * d ) ; } else { S4 = "0" ; } if ( E !== "0" ) { S5 = ( ( ( E / e ) / J ) * K * e ) ; } else { S5 = "0" ; } if ( F !== "0" ) { S6 = ( ( ( F / f ) / J ) * K * f ) ; } else { S6 = "0" ; } I = S1 + S2 + S3 + S4 + S5 + S6 ; if(!isNaN(H)) {$jq("span.es-result-span-h").text(H.toFixed(2));} else{$jq("span.es-result-span-h").text('Error: Please enter numerals only');} if(!isNaN(I)) {$jq("span.es-result-span-i").text(I.toFixed(2));} else{$jq("span.es-result-span-i").text('Error: Please enter numerals only');} }); });

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• System has reached the maximum size allowed for the system part of the registry

  - by Bob Denny

  To be precise System has reached the maximum size allowed for the system part of the registry. Additional storage requests will be ignored. WinXP/64 running fine for 2 years (no /3Gb switch), just started happening. I used ntregopt and the problem went away at least temporarily. However, looking before and after in Windows\System32\Config I see that my System file was reduced only by 10% and is still 170+ Mb. According to my rather extensive research with Google, this is "huge" and should be more like 10-20Mb. The system runs fine. There is a System.bak that is only 11Mb and has the date when I ran ntregopt. That's what I know. Now my question: Is there anything I can do to reduce or rebuild the System registry hive given the above info?

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• User accounts in FTP

  - by Brad

  I have an FTP server(proftpd on debian) that I'm going to allow a couple friends access to, and I want some safety nets in place, just in case. These are some of the things I'd like to do: Jail the accounts to their home directories and impose a cap on the amount of data they can upload Allow them access to a shared folder(via symlink or something) where they have full access(Also with a storage cap, but larger) Allow my own account full access to the system(Using groups I guess) Not allow anonymous access, or allow it with its own folder, separate from the shared user folder Currently, I've got the accounts set up and jailed, but it seems like the symlink that I put in is not allowing them to visit the shared folder. I suppose this has to do with them not having read permissions anywhere but their own home directories, or maybe it's something else, I'll continue to look into it and provide any information that is requested. Is what I'm trying to do possible? Any tips or resources that you can share are appreciated. Thanks.

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• How to Disable secondary drive from booting upon restart - Windows

  - by DevCompany

  I had a Windows 2003 Hard Drive on my server and it went bad so I installed a new clean hard drive and installed Windows 2008 R2 on the new clean drive. I moved the old 2003 drive to be used only for general storage on the same computer. It usually boots into Windows 2008 upon a restart, but just sometimes it starts trying to boot the old 2003 drive and causes boot issues(NTDLR Bootloader, and other errors), even though the order of boot preference is set to boot 2008, and NOT 2003. I need to know how to remove any old code that keeps this old drive as a bootable drive. I still want to use it as a secondary drive just dont want to have any boot code on it. hopefully my situation is clear for everyone to get a good response. Thank you...

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• Can someone explain the physical architecture of RAID 10 in complete layman's terms?

  - by Hank

  I am a newbie in the world of storage and I am having a hard time digesting the physical architecture of some of the RAID levels. I am particularly interested in RAID 10, and 50. I asked the question specifically about RAID 10, because I feel if I understand that, I'll understand the other. So, I get the definition of RAID 10 - "minimum 4 disks, a striped array whose segments are mirrored". If I've got 4 disks and Disks 1 and 2 are a mirrored pair, and Disks 3 and 4 are a mirrored pair - where does the data get striped? Thanks.

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• Win 7 Explorer backup and long paths

  - by user53299

  I use Explorer to do backups because Win 7's backup program asks me to take backups previously done and to put them back in the drive. I am opposed to that idea since I believe backups should remain in storage. With Explorer backups (burn and burn to disc) I have encountered the "destination path too long" error message and it shows the name of a folder "Debug" three times. I have hundreds of folders named "Debug" thanks to Visual Studio. At this moment I'm too angry at Microsoft to write a program to determine my 3 longest paths. (Aside: This is all after coincidentally reading two articles about path junctions earlier this evening which already made me kind of unhappy.) Please, is there an easy way to continue to make backups with Explorer? Edit: I should add that renaming paths wrecks Visual Studio projects so I really need to isolate the small number of problem paths or find a cleaner solution.

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• Command-line access for Apple Time Machine?

  - by Stefan Lasiewski

  We use Apple's Time Machine to back up our workstations at the office. If I want to restore a file, I need to open up the Time Machine GUI and browse files there. The GUI is ugly eye-candy and gets in my way. Is there a way to browse the Time Machine archive using the Mac's command-line? I'm used to Netapps and other storage appliances. I use backintime for my Ubuntu workstation. To restore a file with one of those systems, you can restore a file with a simple command like: cp .snapshot/daily.0/filename.txt . or cp /backup/backintime/20100611-000002/backup/etc/shadow /etc/shadow Is there an equivalent for Apple's Time Machine?

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• Parity Initialization after putting in two new disks

  - by lbanz

  All my firmware is up to date on the server and the controllers. Storage crashed over the weekend. I rebooted it and it detected that I put in two new disks last week (I did check that both disk completed the rebuilding process last week). After it booted into the OS I see that it gave me an information message. After 18 hours it is at 54% so it is looking healthy. But I need to replace 5 more disk in the msa. Should I wait for this message to finish before replacing more disks? 785 Background parity initialization is currently queued or in progress on Logical Drive 1 (15.0 TB, RAID 5). If background parity initialization is queued, it will start when I/O is performed on the drive. When background parity initialization completes, the performance of the logical drive will improve.

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• Transfer many Gigabytes between two servers

  - by Bernhard

  Hello, I have a big problem. I have to move data from an old Webspace which is only accessibla by ftp. The new root server is accessible by ssh of course :-) I need to move all the data from the old space but the amount is just huge. Is there a way to move all the files directly from the old ftp to the storage and not over a third station (my local machine)? I´ve tried it with ftp but it didn't work. I think I´ve used the wrong commands. Is there a way to do this? Thank you in advance Bernhard

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• PowerShell create new Azure VM from uploaded disk (not image)

  - by MikeBaz

  I have a VHD in Azure storage. That VHD is configured as an OS disk through a command like the following: Add-AzureDisk -DiskName $newCode -MediaLocation "http://$script:accountName.blob.core.windows.net/$newCode/$sourceVhdName.vhd" ` -Label $newCode -OS "Windows" I would like to create a new VM pointing at that disk. From what I can tell if I was doing this with an image I would do something like: New-AzureVMConfig -Name $newCode -InstanceSize $instanceSize ` -MediaLocation "http://$script:accountName.blob.core.windows.net/$newCode/$sourceVhdName.vhd" -ImageName $newCode ` | Add-AzureProvisioningConfig -Windows -Password $adminPassword ` | New-AzureVM -ServiceName $newCode However this is wrong for me because I don't have an image - I have a configured VHD that is not sysprepped and can't be. How can I create the VM in PowerShell to point at the existing disk like I can through the portal?

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• Optimal Configuration for five 300 GB 15K SAS Drives

  - by Bob

  I recently acquired an HP Z800 workstation that has five 300 GB 15K SAS Drives. This system will be dedicated to running multiple virtual machines under VMware Workstation (Note: I'm not using ESXi because I do plan to use the system for other purposes.). For the host OS, I plan to install RHEL 5. My number one concern is guest performance. For example, should I create a RAID 10 array for the OS and virtual machine storage with four of the drives and reserve the 5th? Or, is there a solution that will provide better performance?

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• How can I improve performance over SMB/CIFS for an application that has poor write speeds?

  - by Jeremy

  I have a third party application that reads several large files and generates a third large file. Its performance is quite good when the generated file is stored on "local storage", i.e. either a direct attached or iSCSI-based disk. The source files that are read can be stored remotely on our NAS and accessed via SMB with little effect on performance. However, if we attempt to write the target file to any kind of SMB/CIFS share (Samba or Windows Server) the performance drops almost ten-fold. This is unacceptably slow in our case. Writing files to network shares is not otherwise slow. I can copy large files to SMB shares and get great performance - near what I would expect is possible given the disks and network in question. I have a theory that this application's problem with SMB shares has something to do with a lack of write caching over the share and perhaps lots of network roundtrips. Is this possible and is there anything that can be done about it?

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• Ways to increase my Ubuntu partition space

  - by Andreas Grech

  I am currently running Ubuntu and Windows 7 as dual-boot on a single HD. The problem is that when I installed Ubuntu, I didn't allocate as much space as I thought I would need and now I need 'reinstall' Ubuntu so that I can increase the amount of storage space. Now there are two ways to go about this. Either I use use gparted to increase my partition space (but I read that it's not really that safe as regards data loss) or create the new partition with more space and reinstall Ubuntu there. But if want to reinstall Ubuntu, is there a way I can somehow "save" my current Ubuntu and install that one? What I mean is that I don't want to lose my current installed packages and files that I have on this partition. Is there a way to kind of maybe 'streamline' my current Ubuntu so that I install this one on the new partition? If not, what are your opinions as regards gparted?

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• Dell Powervault MD3000 - Not sharing Files between servers

  - by Kevin

  I'm a developer who has to set up a Dell Powervault MD3000 due to lack of resources. I have connected the Powervault to 2 Dell 2950 servers via the SAS cables. I performed the setup using Dell's MD Storage Manager software (4 disks, RAID 5 with hot spare). Then I added the disks using Windows 2003 disk management (Basic, not dynamic disk and formatted with NTFS). When I add files to the array from one server, they are not visible on the other server (and vice-versa). Is the error in the windows disk management configuration?

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• Optimal Configuration for five 300 GB 15K SAS Drives

  - by Bob

  I recently acquired an HP Z800 workstation that has five 300 GB 15K SAS Drives. This system will be dedicated to running multiple virtual machines under VMware Workstation (Note: I'm not using ESXi because I do plan to use the system for other purposes.). For the host OS, I plan to install RHEL 5. My number one concern is guest performance. For example, should I create a RAID 10 array for the OS and virtual machine storage with four of the drives and reserve the 5th? Or, is there a solution that will provide better performance?

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• Serverlocation moved and how can I Move the files

  - by Bernhard

  Hello together, I´ve a big problem. I have to move data from an old Webspace which is only accessibla by ftp. No we have a new root server which is accessible by ssh of course :-) No i Need to move all data from the old space but there is a lot of Gb of files. Is there a way to fetch all files directly from the old ftp to the storage and not over a third station (my local machine)? I´ve tried it with ftp but without success. I think I´ve used the wrong commands. Is there a way to etablish something like this including all files and directorys? Thank you in advance Bernhard

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