From: Craig Robinson (craig.robinson@epa.qld.gov.au)
Date: Thu Mar 13 2003 - 18:26:00 EST
Folks,
We have inherited an E420R with 2 x internal 9.0Gb drives and a A1000
attached. The two internal drives are mirrored using Disksuite 4.2.1. One
thing that I have noticed with this setup is that there are only 3 replicas on
1 slice (c0t0d0s6). This slice is however mirrored on the second disk
(c0t1d0s6). Apart from the mirror, this gives us a single point of failure if
any of the disks go west. I personally don't think the mirror would save us,
because it is the state database which actually informs us about the mirror!!
QUESTION 1: If, for example, c0t0d0 failed would we get a panic OR would the
c0t1d0 mirror kick in?
What we want to do is to break this mirror and create an extra replica (i.e.
having 2 x replicas on each disk).
QUESTION 2: What would be the impact of breaking the mirror that the state
databases are on. Would we lose ALL disk information?
Any comment would be appreciated. Will summarise.
Cheers, Craig
IT Technical Support
Craig Robinson
Environmental Protection Agency
Tel: (07) 3006 4629 Fax: (07) 3227 6534
Email: craig.robinson@epa.qld.gov.au
Visit us at: http://www.epa.qld.gov.au
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