Raid 1 + Hot Spare

[Grayh]

How to setup a raid 1 with Hot spare on a HP 9000 server.

Also how to implement a raid 5 on the server.

[OldSchool]

so many servers, so little information, so...

*what* 9000 server?

what O/S?

what are you using for storage? internal disks or attached array or ???

[Grayh]

*what* 9000 server?

rp3410

what O/S?

HP-UX 11.23

what are you using for storage? internal disks or attached array or ???

The 3 Internal Disks

[Torsten.]

Do you have any kind of RAID controller?

If not, forget RAID 5.

[OldSchool · Accepted solution]

raid1 is mirroring...you wont get a hot spare.

you could split the disk equal sizes and mirror / strict i think, which would allow 1 disk to fail and still be ok. a second drive failure would be fatal tho. don't know if mirror-disk/ux was available at 11.23 or if it was replaced by something else.

If the disks are already partitioned and loaded with the O/S and data this could be a headache. Its much easier to set up when only the o/s is installed

[Torsten.]

Mirror 2 disks with LVM - see appendix:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf


Do you really need a hot spare?
Unlikely.

I would prefer to use the third disk with DRD - dynamic root disk.

[Torsten.]

Well, LVM does even support a hot spare drive, but I have never seen this used.

Alternatively you can install a Smartarray 640x hardware RAID controller and connect either 2 or even 3 disks to it.

[Grayh]

Thank you

[Grayh]

Thanks all