The last administrator setup our production database to use 2 X 13 disk raid
groups. It worked ok for about 1.5 years. However, I recently was
re-organizing and decided to be safer and went to 3 X 9 disk raid groups.
Besides taking longer to rebuild, the performance during rebuild was a big
issue to me - we were already pounding the disks very hard, with disk
utilization going to over 90% utilization frequently. If a disk goes out
during peak hours, performance could degrade very substantially and it is
just a problem that I do not need. So take that into consideration as well.
Derek
-----Original Message-----
From: Tavis Gustafson [mailto:tavis@hq.newdream.net]
Sent: Thursday, October 21, 2004 12:29 PM
To: toasters(a)mathworks.com
Subject: raidsize recommendations
I usually setup my filers with raidsize=7 having no more than 7 disks
per volume. However, I would like create a raidsize=13 volume. The
only risk i can glean from NOW is that rebuild time will increase and
thus increase the chances of a second drive failure (during rebuild).
Has anyone had any real world issues with using volumes of raidsize > 10
thanks,
-Tavis