RAID-5 Vs Mirroring
2001-04-22 04:00:51
Hi all,
Environment:
NSM 3466, RS 6000, AIX 4.3.2 , TSM version 3.7.4,
12 x 18.2 GB disk ( for DB and Diskpool Volumes)
My current DB is of 80 GB size and is alarmingly utililized ( 95
%).The DB volulmes are mirrored inside TSM ( Second Copy).
Therefore another 80 GB space is being used for the second copies. In
order to have more usable space for DB, a suggestion has been mooted
to go for RAID-5 at the hardware level.
IBM's version is that since a second copy MUST be kept , going for
RAID 5 shall require more disk space. Now my question is:
1. With the RAID 5 at AIX level, should a second, synchronized copy
of DB volumes is required.
2. If I do not keep a second copy and take daily full backup, would it
be RISKY.
3. Configuring RAID 5 at this juncture, would anybody see any pitfall
ahead.
Any comments are welcome!
Regards
MAhesh
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