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  • How to disable automatic and forced fsck on disks in a linux software raid?

    - by mit
    This is the /etc/fstab entry of a raid system /dev/md4 that is controlled with mdadm and webmin on an ubuntu 10.04 64 server: /dev/md4 /mnt/md4 ext3 relatime 0 0 We tried to switch off automatic forced fsck on rebotts, as we prefer to implement our own scheduled fsck routine by setting the last parameter of the line to 0 (ZERO). But we found out the forced and automatic check still occurs on the underlying real disks, lets say sdb1 and sdc1. How can we switch that off?

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  • raid 0 failure, drives look fine

    - by Alan
    Hello, after a lovely blue screen my vista 64 machine decided to reconfigure one of my drives to no longer be part of my raid volume. So now my raid fails as it only has one member disk. This happened to me about 6 months ago and I just changed the disk in question back to a raid disk and all was well. However I cant seem to find that option in my bios or raid config anymore :( Any help would be appreciated

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  • What do you do to get your software design robust, flexible and clear?

    - by Oscar
    I am still getting mature as a software engineering/designer/architect, as you may want to call. At this point in time, I am getting small projects, private projects and so on. What I noticed is that even though I think about the SW structure, design some diagrams, have they really clear in my mind when I start coding, at the end, my software is not flexible and clear as I would like to. I would like to ask you what kind of approaches, mechanisms or even tricks do you use, to get your software (and SW design) flexible, robust and clear (easy to understand and use). So.... Any ideas to give to a beginner?

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  • Does it matter to you that a software is "available source" but not "open source"

    - by ccpod
    You probably know the list of open source licenses officially approved by the OSI. Most notably I guess would be the GPL, MIT, [insert your favorite license here]. I recently ran into a project which although was open source (the creator made all source code available), was not officially open source under one of those official licenses. It released the source, but made no promise to release the source in the future. It allowed modification suggestions, but made no promises to accept patches and disallowed external distribution of externally-patched versions. It allowed the use of the software in commercial or paid projects, but disallowed the sale of the software itself. I suppose it could be called "available source" not open source as we like to think of it. I can see why the management team of a company wouldn't want to do business with this software. They can't fork it, they can't sell it, they can't create their own version of the software and distribute it or sell it. But would it matter to you as part of a software engineering team who's just using this software? I can still get my work done with it, I can use it in a project for which I'm paid (but I can't sell the software itself, which I'm not in the business of doing anyway), and I can make changes to the code to make it behave differently for my needs (but I can't make those modifications public), and if I do want those modifications officially made available to others, the approval is up to the project itself and they choose whether to incorporate them in an official release or not. So we know that a company that wants to base its business on this "available source" software can't do that, but as someone from the software engineering team, would those differences matter to you or do they seem less relevant? Curious what others think of this.

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  • RAID 5 RECONSTRUCT with RAID Reconstructor

    - by user22914
    I have Dell Poweredge server 2600 with Raid 5 in 3 hard drive Scsi 36gb each, it was fail to boot sinc the third drive is offline. I attached Sata card adapter to Sata hard drive and install OS SERVER 2003 to it, downloaded drivers for Raid and everything goes fine when I use recovery data software called "GetDataBack" from here http://www.runtime.org/data-recovery-software.htm but the problem that not all data recovered, I am still looking for importants data with about 5 GB size. I have another software called "RAID Reconstructor" from "http://www.runtime.org/raid.htm" I thought if I run it to reconstruct that will help to recover more data and put the third drive to be Online but I am afraid that might erase the current data in the other drives. Please I need your advise in how I could retrive the remaining data? Thanks

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  • Getting VMWare ESXi 5.0.0 with RAID using the Intel X79 chipset to work

    - by Deleted
    I have bought a new server where I use the motherboard ASUS P9X79 WS X79 S-2011 ATX. It will be used for virtualization, preferably using VMware vSphere Hypervisor™ (ESXi) if I can get the RAID on my motherboard working with VMWare (it does not detect it). The motherboard has the Intel® X79 chipset, which for RAID controller means vendor ID 8086 (Intel) and model ID 2826. When I boot the ESXi 5.0.0 installation media from my flash drive I can not see drives in the RAID5 set I created. Questions: Is there a VIB file for the RAID controller I can use? I have found one article at http://www.intel.com/support/motherboards/server/sb/CS-033313.htm on getting RAID to work with some Intel controllers, it lists 9 integrated RAID modules it is comptabile with. However, there is no mention of the X79 chipset.

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  • Reconfigure RAID on Dell PowerEdge T710

    - by Stefano Borini
    I have a Dell PowerEdge T710 under my feet at this very moment, with RedHat Enterprise Server 5.3. I have 6 1TB disks and two 500GB. parted reports two devices, one 500 GB and the other 4 TB. So I assume the RAID has been setup as mirror for two disks, and I assume as RAID 5 the remaining ones. I say "I assume" because it does not make sense. Having 6 disks in RAID 5, I should obtain a total space of 5 TB, not 4TB. It's not even RAID 10: I would end up with a 3 TB unit. How can I check and eventually modify the RAID array definition? In the Fujitsu Siemens I played with some time ago, at boot I had the chance to enter the controller BIOS, but here I don't see a clear way to perform this operation.

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  • Advantages of multiple SQL Server files with a single RAID array

    - by Dr Giles M
    Originally posted on stack overflow, but re-worded. Imagine the scenario : For a database I have RAID arrays R: (MDF) T: (transaction log) and of course shared transparent usage of X: (tempDB). I've been reading around and get the impression that if you are using RAID then adding multiple SQL Server NDF files sitting on R: within a filegroup won't yeild any more improvements. Of course, adding another raid array S: and putting an NDF file on that would. However, being a reasonably savvy software person, it's not unthinkable to hypothesise that, even for smaller MDFs sitting on one RAID array that SQL Server will perform growth and locking operations (for writes) on the MDF, so adding NDFs to the filegroup even if they sat on R: would distribute the locking operations and growth operations allowing more throughput? Or does the time taken to reconstruct the data from distributed filegroups outweigh the benefits of reduced locking? I'm also aware that the behaviour and benefits may be different for tables/indeces/log. Is there a good site that distinguishes the benefits of multiple files when RAID is already in place?

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  • Do I need to rebuild the array after putting in a new hot spare?

    - by Shade34321
    So my experience with RAID is minimal. So I figured I'd come and ask here. We have a 16 drive RAID system that have 15 drives in RAID 5 with a hot spare left over. Recently one of the drives in the RAID was giving errors so I cloned it over to the hot spare and put a new drive in it's spot. I made the new drive the hot spare as I was told. I was told to rebuild the array after putting in the new drive as a hot spare so I tried and wasn't able to. So my question is do I need to rebuild it and if so why did it tell me I couldn't. Thanks! UPDATE: So I've come back up to work and looked at the RAID and it pulled in the hot spare into the raid and kicked out another drive.

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  • How to enable raid on Gigabyte G33M-S2L?

    - by Wabbitseason
    I'd like to set up RAID-1 on my Gigabyte G33M-S2L motherboard and for this reason I purchased two 1T hard drives. According to SiSoft Sandra the motherboard does support RAID but it is disabled. I looked everywhere in BIOS even upgraded it to the most recent version but found nothing that would have said "RAID" and the operating system I wish to install sees the two HDDs, not just a RAIDed one. What could be the problem? Does my motherboard support RAID (as the diagnostic tool claims) or do I need to buy a RAID card?

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  • Will disk cloning resolve bad stripes on RAID?

    - by user13323
    Hi. We have a logical RAID1 drive in bad stripes state, which kept that status even after replacement and rebuilding of both drives, and gives errors in Windows logs about failure of writing to disk. IBM support suggests erasing and re-creating the RAID, then re-installing the Windows. The resulting down-time unacceptible for us, so we want to clone the RAID (via Acronis True Image), erase and re-create the RAID, then dump the cloned data back. Following IBM logic where RAID erasing and re-creation resets the whole RAID meta-data, this should clear the bad-stripes status, and start from a blank page. Question is if such strategy is possible, and will produce the desired effect? Any idea is appreciated - thanks in advance!

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  • Openfiler RAID 10 option not found

    - by chrisling106
    Hi, I'm building a NAS using Openfiler2.3 (from 32-bit ISO), first of all I want to experiment it on VM first before going out and buy the harddrives needed. I created 5 virtual drives on VMware, sda is 2GB and the rest 1GB each (sdb to sde). I left sda blank and want to setup a RAID 10 disk using sdb, sdc, sdd and sde, 4 RAID partitions are setup successfully, but when I try to create a RAID device the only option for RAID level is 1, 0, 5 and 6. RAID 10 is not there! Can someone let me know what have I missed, please? TIA.

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  • Does RAID 1 protect against corruption?

    - by Shaun
    Does Raid 1 protect against data corruption? For example, let's say that I am keeping all of my important files on a NAS that uses 2 disks in a RAID 1. If one hard drive has some kind of internal problem and the data becomes corrupted, does the RAID recognize this automatically and correct it using data from the other good disk? Could it even know which copy is the good one? Does RAID 5 protect against corruption? I know that RAID is not a backup solution. I am trying to figure out how to make sure that I am not backing up corrupt data!

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  • How to view status of software RAID 1 resynching?

    - by tputkonen
    I have two 500 GB disks and yesterday I mirrored first drive to the second one using software RAID 1. PC has now been on for 30 hours. Both disks say "Resynching", but there is no progress indicator. In addition, there is a small yellow exclamation mark on both disks. My questions are: How long could the synch take for 500 GB drive with about 150 GB of data? PC has 4 GBs of RAM and AMD dual core 4000+ Is there a way to monitor status of the synching? How can I check what the exclamation mark means?

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  • Best software for creating icons?

    - by John
    Hi, I'm a developer,but not very good designer.I need a lightweight software for creating icons for my applications. I have a logo of the product and want to make it an icon,please suggest the best software for that. NOTE: I do not need software for creating icons from scratch,but from large image to .ico.Something that will help me. Thanks in advance

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  • How to recover data from software RAID 5 disk partition

    - by Ali n
    I have CentOS 5.8 on my computer, with 5x 1TB hard drives. I used software RAID. (RAID 1 as a boot partition md0, RAID 0 as a root partition md1 and RAID 5 as /home partition md3). Unfortunately one of these hard drives failed lately and I want to replace it with a new one. I want to know that is it possible to change this hard drive without data loss? The important partition is RAID 5 so in theory if one of hard drives failed I should be able to recover its data without any problem. But in practice how can I do that?

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  • some questions about raid card

    - by cpps
    I have some questions about raid card. Use LSI MegaRAID® SAS 9260-8i raid card as a example. There is only two connection ports on the raid card, and they provide two cables that can connect 8 SAS/SATA storages. The document say it can connect "Maximum 32 drives per controller", I want to know how can I connect more than 8 hard disks with this card. Is that they say "Eight internal SATA+SAS ports" means they provide two cables which can connect 8 hard drives, but you can use other way to connect Maximum 32 drives? The other question. I see host bus adapter has raid integrated , so what is the difference between host bus adapter and raid card. Are they the same? I also know is SAS/SATA Expander's function only to connect more hard drives? Thanks in advance.

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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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  • Certain drives in RAID 5 set intermittently are not recognized

    - by hydroparadise
    I have a curious problem in that 1 (sometimes 2) drives do not get recognized in a RAID 5 set. The server is getting rather old at 5 to 6 years, but still seems to function well once the machine sees all drives. So that leaves me with three areas to consider: the motherboard, the SATA RAID card, or the individual hard drives themselves. I am leaning toward the RAID card, but have not had much dealings with RAID cards. What would cause individual drives not to be recognized in the set? If it was the card, I would think that it would be all or nothing. If it were a single drive, is it possible that it would only work sometimes? The only other thing to consider is that that they are different drives (Seagate and Western Digital) but all around 80 GB. SATA RAID controller is 3ware Escalade 8506-4LP Motherboard is a SuperMicro P4SPA+ Am open and available for more details if needed...

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  • From which plex am I booted from on raid?

    - by rumburak
    I have a server with mirrored boot volume. It is software raid 1 in Windows Server 2008 R2. I do not have physical access to the server. I am looking for a way to check which disk is a boot drive. I need a way to check it from os. How can I do that ? EDIT: I know how to do that, but I dont think its proper way. From diskpart I can break mirror: select volume 0 break disk=0 And Windows will only allow me to do that on not current boot disk. I want to check which one is boot without breaking mirroring.

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  • Software RAID 1 broken, how do I fix this?

    - by Edward
    I'm running CentOS 6 x86_64. There is a software RAID 1 being used on the two internal 80GB drives. I got the following e-mail sent to me: A DegradedArray event had been detected on md device /dev/md1. Faithfully yours, etc. P.S. The /proc/mdstat file currently contains the following: Personalities : [raid1] md0 : active raid1 sda1[0] 511988 blocks super 1.0 [2/1] [U_] md1 : active raid1 sda2[0] 8190968 blocks super 1.1 [2/1] [U_] bitmap: 1/1 pages [4KB], 65536KB chunk md4 : active raid1 sdc1[0] sdb1[1] 1953512400 blocks super 1.2 [2/2] [UU] md3 : active raid1 sdd5[1] sda5[0] 61224892 blocks super 1.1 [2/2] [UU] bitmap: 1/1 pages [4KB], 65536KB chunk md2 : active raid1 sdd3[1] sda3[0] 8190968 blocks super 1.1 [2/2] [UU] unused devices: <none> The system appears to have booted fine and is working. The two drives' content did not change at all. I only removed and reinstalled them while I was booted on the CentOS Live DVD. How do I get the array working again?

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  • raid 5 creation (using mdadm) lots of read/writes on creation: is this normal?

    - by Gbrits
    I created a software raid 5 disk using: mdadm -C /dev/md2 -l5 -n4 /dev/sd[i-l] at the same time I'm using dstat to see io-activity: dstat -c -d -D total,sda1,md2,sdi,sdj,sdk,sdl -l -m -n and notice that disks sd[i-k] are all read from and sdl is written to. Now, I do understand that raid5 has to be configured, but it takes a really long time and all disks are clean & formatted (using xfs) so I figure there might be some kind of shortcut to skip (unnecessary? ) checking.. Is it? The creation is part of a time-critical nightly batch-process (run on amazon ec2) so it's not a one-time thing. Thanks, Geert-Jan

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  • SSD RAID 5 or 10?

    - by Kyle
    I have a few extra SSD drives (I know its rare but this has actually happened). I figured since I have almost 500 GB in SSD's I might as well replace all of my standard HDD's with them. I currently have a RAID 5 setup and enjoy the the speed and redundancy with 10k RPM drives. Should I bother to put my SSD's in RAID 5? I have not heard of anyone doing this and have no idea how it is going to work out. The loss of space doesn't really bother me since I have a 2 TB NAS with all my media on it. Does anyone have experience with putting solid state drives in a RAID 5. If RAID 5 is a bad idea has anyone had experience with a RAID 10? is it possible to stripe the SSD's and provide redundancy with standard HDD's?

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  • converting 0+1 raid array to 0

    - by werelord
    I'm currently running raid 0+1; four 500 GB drives in the array.. I'm looking at migrating the array from 0+1 (Stripe+Mirror) to 0 only (stripe).. The goal is to remove the hard drives from the array in order to put them in the newly purchased Drobo, then copy the data from the remaining striped raid to the said Drobo.. Is it sufficient to just remove the drives themselves and change the raid configuration within the nvidia raid config?? Or is there something more that needs to be done?? Does the order matter (i.e. removing drives first or changing the raid configuration??) Is it possible to migrate the array this way without having any loss of data? I'm wary about burning all that data to DVDs (few hundred GB worth) to back it up.. Any other advice from people that may have done this (or have other insight) would be helpful as well..

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  • Is it possible to use software raid in Windows 7 on the boot partition?

    - by DoctaJonez
    I want to use RAID 1 on my workstation configuration at work, and I've been looking at using the build in mirror functionality in Windows 7. When you click on the add mirror option it presents you with the following warning. I've done some Google searching and the consensus seems to be that you cannot boot from a dynamic volume, but some forum posts seem to indicate that people have tried this with success (e.g. here). With Google searches producing contradictory information I thought I'd ask you guys for an authoritative answer. Can I use the inbuilt Windows 7 mirroring for my boot partition? Or as I suspect, will it make it unbootable due to it being converted to a dynamic disk?

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