Hi,

Do not use RAID 5 if performance is at all a concern.

I use RAID 1 (mirroring), for my database and log.
I use RAID 0 (striping), for my disk pools.

Jeff hit the nail on the head, configure your disks to be fast and build the 
redundancy into your tapes.
IMHO, do not worry about redundancy on the disk pools. With a DB that large 
RAID 10 would give you performance and redundancy.

Miles


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Miles Purdy 
Miles Purdy 
System Manager
Farm Income Programs Directorate
Winnipeg, MB, CA
purdym AT fipd.gc DOT ca
ph: (204) 984-1602 fax: (204) 983-7557
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>>> Anuvinder.CHAUHAN AT ST DOT COM 22-Jun-01 6:57:06 AM >>>
>>> Anuvinder.CHAUHAN AT ST DOT COM 22-Jun-01 6:57:06 AM >>>
     Hi All,

     Currently we are running AIX over RS/6000 with TSM on top of it.This
     is further integrated to the IBM 3494 library.
     In the current scenario we have mirroring implemented only for the TSM
     database .I want to built in more redundancy therefore planning to go
     for RAID 5 implementation.There is no redundancy for the data backed
     up by the storage pools.Size of the database is around 115GB.

     I would like to know does going in for RAID 5 is a wise decision and
     what are the implications involved.


     Regards

     Anuvinder Chauhan
     System Administrator
     ST Microelectronics Ltd.
     INDIA.