I have Dell PowerEdge 1950 with hardware raid Perc 5/i.

I want use software raid md/lvm.

Is any way to totally disable this raid and see "raw" sata disks?

I play alot with BIOS , enable SATA, disable raid controller, but nothing happents, i not see the disks.

Any advice?

  • out of curiosity - can you please tell why do you prefer md/lvm instead of perc in this case? thx! – pQd Aug 2 '12 at 6:10
  • I hate this perc. Its slow, and low featured. For example i have 2 disk 500G and 1T and want create 500G raid1 and 500G without raid. With perc - i cant do that. Also Megacli utility - terrible. Also md and lvm works very well. – Korjavin Ivan Aug 2 '12 at 8:03
  • "Its slow" it is not any slower than software raid will be. – JamesRyan Oct 8 '14 at 13:02

I had a similar problem with the LSI controller. I've every single disk exported as a JBOD device.

  • Jbod with one disk, look like raid0 on one disk. Thanks. Good idea. – Korjavin Ivan Aug 2 '12 at 12:32

Are you trying to use a filesystem solution like ZFS, which prefers RAW disks? If so, the better long-term approach is to use a dedicated SAS controller (HBA) instead of a RAID controller. I tend to prefer LSI's offerings.

Also see: ZFS SAS/SATA controller recommendations

  • Thanks alot. Yes, i want something like zfs, but on this hardware, without upgrades. Just wonder if it possible. – Korjavin Ivan Aug 2 '12 at 12:30
  • Nope. Not unless you create RAID 0 arrays comprised of one disk each and present the resulting volumes to ZFS. – ewwhite Aug 2 '12 at 12:40

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.