Hi Rich,

If you can afford R0+1 cost, why not. 
IMHO, I prefer TSM-mirroring than AIX-mirroring.

What kind of disks do you have. SAN-storage ? SSA drawer
or "single" SCSI ones ?

Your disks ares stressed during backups, it's quite normal, if you
think your system is two heavily loaded, reduce the number of
concurrent sessions or/and increase BUFPOOLSIZE

rv

> -----Message d'origine-----
> De : Dearman, Richard [mailto:rdearm1 AT UIC DOT EDU]
> Envoyé : mercredi 4 avril 2001 22:02
> À : ADSM-L AT VM.MARIST DOT EDU
> Objet : RAID5 or 0+1
> 
> 
> I have been seeing high memory utilization and high disk busy 
> problems on
> the disks that my database sits on when I do backups.   I'm 
> running AIX
> 4.3.3 with in a H70 with 2 cpu's and 1gb of memory.  I was thinking of
> moving my tsm database to a RAID 0+1 setup from a RAID5 setup 
> to see if I
> gain any performance.  Does anyone have any suggestions on database
> performance issuses.
> 
> Thanks
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