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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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How to remove swap partitions from RAID 1 Array on Ubuntu?

Can anyone point in the right direction on how to remove SWAP out of a RAID1 configuration on Ubuntu 10.04 server? According to the Ubuntu Advanced installation guide, here, it said to add swap to the raid but I am having some serious performance…
thiesdiggity
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What RAID Level Should Be Used

I am working on a server build project for work and have inherited the following items that I need to figure out the best way to handle and configure. 2 of these: I/O Crest SY-PEX40008 PCI-e SATA II Host Controller Card 8 or 9 of these: Hitachi…
John
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identifying and cloning the superblock of a raid0 mdadm v0.90 array

/dev/sdb13 174706938 976768064 401030563+ fd Linux raid autodetect The size of that partition is 802061126 sectors. From what i read - mdadm should have placed the actual superblock somewhere inbetween 128K and 64K to the very end. This…
XXL
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How do you know if your Windows Server 2008 R2 Software RAID has failed?

Possible Duplicate: How do you monitor the health of a mirrored disk in Windows? I have software RAID (RAID-1) enabled on 2 pairs of Drives on Windows Home Server 2008 R2. To test the redundancy, I unplugged a drive while the server was running.…
Omar Shahine
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Can I configure a RAID 1 on the Dell Poweredge 860 with the onboard SATA Controller

Is there a way to set up a RAID 1 with two SATA HDD on a DELL Poweredge 860 that has no specific RAID Controller? I want to use the on board SATA controller to set up my RAID 1.
David
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SCSI error: return code = 0x08000002, sense key: Aborted Command

The kernel logs: ata2.00: exception Emask 0x0 SAct 0x7fffffff SErr 0x0 action 0x0 ata2.00: irq_stat 0x40000008 ata2.00: cmd 61/08:f0:6f:5b:97/00:00:00:00:00/40 tag 30 ncq 4096 out res 41/10:01:6f:5b:97/d5:00:00:00:00/40 Emask 0x481 (invalid…
quanta
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spares missing on ubuntu mdadm software raid 5 how to disable?

I want to understand and if it makes sense, disable the alert message I receive about spares missing on my ubuntu linux software raid 5. I used mdadm and set up a /dev/md0 raid volume made up of 3 hard drives. I then set up email alerts so I can see…
Scott Szretter
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Missing RAID 6 array + LVM volume after hard reboot

After a restart which stalled, I did a hard reboot and now mdadm can't see the RAID 6 array anymore, LVM can't find the volume which was on that raid array. I have looked into /etc/mdadm/mdadm.conf, it doesn't contain my /dev/md2 (the RAID 6…
gerhard
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rebuilding raid5 array

I inherited a machine that was running Debian with a RAID 5 array. I installed a bunch of updates (1700 or so) that the OS recommended, then after rebooting, the raid array did not mount. The device /dev/md0 now does not exist, and I do not know…
Diogenes Creosote
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Centos 5.5 SoftRaid Grub Installation

I did the Soft RAID 1 installation with Centos 5.5 on my server with 2 SATA 1TB disks. I followed this great guide here: http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5 However, there is one bit difference, that my Grub is default installing to…
starchx
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Software RAID to hardware RAID, can it be done?

Can it be done ... well. (For the record, I did not set this server up.) In my server there are 4 disks. 3 of them are in a software RAID5, and 1 has the OS installed. I want to buy a RAID controller, 4 new HDs and set up a hardware RAID5. If…
gtaylor85
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NAS software options?

I want to build a NAS that supports hard links (linux based, NFS?) due to the software that will use it. I need some kind of RAID in case of a single drive failure. I really like FlexRaid, but it does not support hard links. FreeNAS has a nice RAID…
Scott Szretter
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windows 7 Mirror Failed Redundancy

I've been trying to setup software Mirror RAID using the Windows 7 Disk Manager. However I'm getting the "Failed Redundancy" error no matter what I do. I think the exclamation icon is appearing on the drive I'm using as the mirror. The second disk…
Daniel Little
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Create superblock for software raid-5 array

I have created a raid 5 array with mdadm. I created partitions on all five of the disks created a raid-5 array with mdadm on these five partitions). Everything seems fine however when i try to mount the array i get a complaint about there being no…
Martijn v E
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/dev/md device disappeared in Linux RAID1 array

I inherited a NAS server that is setup with 5 RAID1 soft arrays grouped together into a XFS volume group. Whoever built the 5th md device created it without a Linux Auto RAID partition (Looks like they did a mdadm --create using the raw disk (i.e.…
John P
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