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We are considering purchasing an IBM 7133 SSA disk subsystem with 8 x 4.3Gb
drives, 4 mirrored on 4 giving 16Gb. of usable disk space.
The primary reason is to increase the available disk space on the RS6000
58H from 8Gb (9333) to 16Gb's. Bearing in-mind that we are currently using
AIX 3.25 with a maximum file size of 2Gb. We are now faced with the
problem that our 4 - 2Gb Oracle data spaces spread evenly across 4 x 2GB.
drives on our present 9333 drive sub-system, will now need to be placed on
only 2 drives (2 data spaces on each) which would then allow the extra
diskspace to be used (as we must mirror). However, will placing 2 Oracle
data spaces on the same physical drive/logical volume, slow performance?
Will we be suspect to drive access contention?
My own thoughts are that the extra performace of the SSA disk sub-system
will negate any drop in performace due to less drive spindles being used
for the Oracle data spaces.
I hope I've explained the problem, and would appreciate any additional
ideas on the subject....
Thanks Dave..... Received on Thu Oct 31 1996 - 00:00:00 CST