topic Re: RAID 1+0 ? in Disk Enclosures

RAID 1+0 ?

James D. — Tue, 15 Apr 2008 17:15:20 GMT

I am testing a RAID 1+0 configuration in a test environment. I have a DL380G5 and setup a RAID1+0 using 6 146GB drives. How can I tell which drives are mirrored? The ACU only shows me the Array w/ logical drive (RAID 1+0) or the physical drives.

Re: RAID 1+0 ?

Derek Whigham_1 — Fri, 25 Apr 2008 09:55:04 GMT

Why do you care which drives are striped and which are mirrored. The Array controller manages these and will rebuild the raidset if a failed drive is replaced.

You should be presented with a LUN based on the setup on top of this raidset.

Re: RAID 1+0 ?

John Kufrovich — Fri, 25 Apr 2008 14:06:10 GMT

James, just use the b:t:l of the drive. Start from the lowest b:t:l to highest.

Then split it in two groups of three. The first drive from each group are mirrored. so forth and so forth.
example,
0:1:0
0:2:0
1:1:0
1:2:0
2:1:0
2:2:0

0:1:0 and 1:2:0 will be mirrored.

Or you could use a IOmeter and do one single write to a drive using a small block size, and watch the Drive LEDs.

Re: RAID 1+0 ?

Deaton — Wed, 21 May 2008 14:39:30 GMT

Yes I also want to know. I think it should be a feature. I also have 6 drives on a Smart Array 500, which I didn't configure.

From this, does it mean my drive 1:1 is mirrored to 1:4 ?

Physical Drive 1:1
Physical Drive 1:2
Physical Drive 1:3
Physical Drive 1:4
Physical Drive 1:5
Physical Drive 1:6

I think it's important as if I have two drives fail I can lose the array.

Re: RAID 1+0 ?

gregersenj — Wed, 28 May 2008 10:07:12 GMT

This guide might be helpfull

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00378986/c00378986.pdf?jumpid=reg_R1002_USEN

It descibe how to split arrays, using ACU, when supported.
Or the manual method.