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Questions tagged [software-raid]

RAID solution handled by the operating system.

Software RAID is implemented in the OS. It uses CPU to handle the RAID setup. It is cheaper than hardware raid. It often doesn't support features which you can find with hardware raid like:

  • hot spare
  • fast rebuilding of an array
  • hot swapping
  • high write throughput

Another problem is that it uses the CPU and memory of the computer to perform all the tasks (hardware raidcards have a special cpu and memory for this task). Therefor generating more load on your system.

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3 drives fell out of Raid6 mdadm - rebuilding?

i had an mdadm raid6 array with 13x1TB drives. Within 10 minutes 3 of these drives fell out of the array... we assume bad cable to the controller card and replaced, however now we need to get the drives back into a working array. because md0 was…
pironic
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Software Raid 10 on VirtualBox?

I want to learn how to use Software Raid 10, is it possible to use VirtualBox by adding four storage images? This is my plan: 4x 100mb partitions (1 on each drive) configured as a raid 1 for /boot in ext3. Then with the remaining space on each…
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Recovering linux software RAID array without removing it's items

I have linux software raid (RAID10), md2 : active raid10 sda6[4](F) sdd5[3] sdc5[2] sdb6[1] 390620160 blocks 64K chunks 2 near-copies [4/3] [_UUU] which has degraded state. Can i start recovery operation without removing and adding back failed…
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Ubuntu raid - replacing drive?

I've set up software RAID1 with the latest Ubuntu version - 11.04 using two 250GB harddrives which initially worked great. Tried to unplug both and computer still started with degraded raid status - reconnecting and rebooting makes the resync…
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How can I view Server 2008 Software RAID 5 Resync Progress?

Skipping over the pros/cons of RAID 5, I have a software RAID-5 array made from 3x 2TB disks. I started the sync and nearly 12 hours later the sync is still going. Is there any way that I can view the progress of the sync? Most screenshots I've seen…
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Encrypted LVM on RAID1 - Failure testing, manual mount

We have an Ubuntu 10.04 LTS server set up with LVM running on top of disk encryption, which runs on top of a RAID1 volume comprised of two physical SATA disks. The configuration looks like this: _______________ |swap| /…
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Setting up Linux softRAID10 so it can boot after a drive failure

I would like my RAID10 to survive the failure of the bootdisk. I want to write grub to the MBR of each disk in the array so that in the case of a failure the array will still boot on the remaining members. I have a 4 disk array, so in theory I…
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Can you use drives while Raid 1 is rebuilding?

I am going to be rebuilding a raid 1 array. While the rebuild is happening can people still read/write to data in the array?
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Does a software raid break when reinstalling the OS?

Does software raid break when reinstalling the OS? If yes, is there any way to prevent it, or recreate it without data loss after the reinstall? If no, is there anything you have to remember when doing it so it doesn't? Or is it just fixed…
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Intel Matrix Storage RAID and Linux mdadm

I've got a 3-disk RAID 5 array that was set up under Windows that I'd like to get working in Linux using mdadm. I've done some basic fakeraid stuff before, but this was set up with the Intel Matrix Storage utility in the BIOS, and it's not working…
Bill Fraser
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How to disable software raid (mdadm)?

I have two 500GB hard disk that were in a software RAID1 on a gentoo distribution. Now I have put the on an Ubuntu Server 10.10 and they still want to be in a RAID. How do I disable the RAID. sudo mdadm --detail /dev/dm-1 mdadm: /dev/dm-1 does not…
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Any disadvantages of using built-in software-RAID-1 on a Windows Server?

I have had some problems using hardware-RAID on a server. Now I'm planning to use the Windows Server built-in software-RAID-1 instead. The server will only be used for Business Administrations, so I don't need high performance. The operating system…
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slow software raid

I've got software raid 1 for / and /home and it seems I'm not getting the right speed out of it. Reading from md0 I get around 100 MB/sec Reading from sda or sdb I get around 95-105 MB/sec I thought I would get more speed (while reading data) from…
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Mac OS X Server 10.6 - Apple's software mirrored RAID worth it?

I am installing an Intel Xserve (Quad core Xeon) with Snow Leopard Server (10.6) on two 80Gb 7200rpm SATA HDs. I created a mirrored RAID set using Disk Utility with those two drives, all went fine. I was then asking myself if this is really a good…
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RAID Read/Write Speed Gradually Slows

This is actually a server at home, but I felt it was sufficiently complicated as to not have it on SuperUser and could easily apply to a professional situation. I have a file server running Debian (Lenny 5.0.4), and it has an XFS LVM on top of a…
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