topic Re: A7143A Raid160 configuration in Disk Enclosures

A7143A Raid160 configuration

Bernhard Mueller — Wed, 03 Nov 2004 11:18:43 GMT

Hi,

suppose I have an MSA30 with 10x36GB drives in split bus mode attached to 2 channels of the raid controller (5 disks on each channel) and want to create a big LUN in RAID1+0 across all disks *and* make sure that the mirrored stripe is on the other channel.

What would be the corrrect saconfig syntax?
saconfig -R 1+0 -p 1:0 -p 2:0 -p 1:1 -p 2:1 -p 1:2 -p 2:2 -p 1:3 -p 2:3 -p 1:4 -p 2:4

or maybe
saconfig -R 1+0 -p 1:0 -p 1:1 -p 1:3 -p 1:4 -p 1:5 -p 2:0 -p 2:1 -p 2:2 -p 2:3 -p 2:4

NO guesswork please. man page and install guide do not help...

Regards,
Bernhard

Re: A7143A Raid160 configuration

Ron Lawson_1 — Wed, 03 Nov 2004 20:46:32 GMT

The order in saconfig doesn't matter. When the controller gets the list of disks, it orders them and divides them into two groups. Disks in the first half of the list are mirrored to the ones in the second half of the list.

In other words, as long as you have even numbers of disks on each channel, it will always mirror across channels.

Re: A7143A Raid160 configuration

Bernhard Mueller — Thu, 04 Nov 2004 03:11:17 GMT

Ron,

excellent!

Regards
Bernhard

Re: A7143A Raid160 configuration

Bernhard Mueller — Thu, 04 Nov 2004 03:24:55 GMT

Thanks Ron