RAID 5 & Replacing Disks
Posted on 2004-10-22
I have a proliant ML350 with 4, 9 gig SCSI drives on a RAID 5 (three are in use and four has no power light, which I don't understand). The original admin set up a 2 gig partition and a 15 gig partition. Drive C: is getting full (700 megs of free space left) and the big cheeses wants to replace the 4, 9 gig drives with 4 36 gig drives. I want to change the RAID array when I do this so that instead of a 2 and a 15, we have a 36 gig C: and a 36 gig D:. In other words I want to mirrior the first two and the second two. The server does have a tape backup, but I'm thinking if I back up the full server, replace the drives, I'll have to reinstall the server os and backup software before I could do the restore. It's not that I mind that, it's just I want to minimize downtime and all that.
What's the best way to do what I want to do?
I'm thinking of using Ghost, but have yet to figure out how I'm going to do this. At first I thought I'd just install a second RAID controller, bring the second array online, Ghost one to the other, replace the old with the new and reboot. How does that sound?
I would appreciate feedback on the best way to accomplish this change out.