From: A. Mahendra Rajah (Mahendra.Rajah@URegina.CA)
Date: Tue May 14 2002 - 13:19:22 EDT
I have been tasked with setting up our disks farm in a
RAID 0+1 configuration using software alone (no hardware
RAID card!).
We have an ES40 runnig Tru64v5.1A+pk1 that has 3 SCSI
buses serving 16 disks. We run Oracle & Banner on this
ES40 and all the file systems are AdvFS type.
We have full licenses to run LSM and AdvFS. LSM is the
only means of setting up RAID 1 (mirroring), but for RAID
0 (striping) I am thinking that I could:
1. Use sliced plexes in LSM, or
2. Create every domain on a few disks and join them
using AdvFS's 'addvol' command.
I would like to solicit opinions from the list as to the
best method to use. I think method 2 is more dynamic in
that I can add more volumes as needed and also use
AdvFS's 'balance' utility to balance out the contents of
the domain. I could even stripe a large file across
multiple volumes. (I am used to AdvFS commands and may be
I am biased!)
I don't see any advantage in doing 1, but the AdvFS
Administration manual (Page 4-17) warns not to use AdvFS
striping if LSM is already in use.
Comments, suggestions or horror stories, please?
Thanks,
-- mahendra
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A. Mahendra Rajah Email: Mahendra.Rajah@URegina.CA
Tru64 UNIX Systems Manager Phone: (306) 585-4496
Dept. of Computing Services FAX: (306) 585-5060
University of Regina,
Regina, Sask., S4S 0A2
Canada.
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