On Mon, 6 Jul 1998 12:06:58 -0400, John Zoltak <[log in to unmask]>
wrote:

>Hello List Members,
>
>I am about to switch from 5, 2GB individual disks to disk array's. I
>have a HPC2300WD Model 20 with 10, 2GB disks. At first I was going to
>configure them as 2, RAID-5's of 5 disks each for 2 logical disks of 8GB
>each. Then I realized that I can't use more than 4GB for a system disk.
>And even so the system tends not to put files on the system disk, so I
>would end up with one disk serving most of the applications. I could go
>with 3 array's of 3 disks each (4GB,4GB,4GB) leaving one spare, or get 2
>more disks and have 4 array's of 3 disks each. What disk configuration
>would you suggest?
>

What we did:

LDEV 1: 2+2 Mirrored    2 GB
LDEV 2: 2+2+2 RAID-5    4 GB
LDEV 3: 2+2+2 RAID-5    4 GB

This would leave you two disks as hot global spare, or buy one more
and create anotherr 4 GB LDEV out of it. Having a hot global spare is
worthwhile, however...
---

Mark Landin                 "Before anyone passes judgment ...
T. D. Williamson, Inc.       remember we ARE in the Arctic" --
UNIX Sys. Admin              Fox Mulder during a physical exam