Yes I'm well aware of the different pro's and con's to using various levels
of RAID vs non-RAID. In my application protection is paramount and mirroring
is simply too wasteful to use. I've used RAID5 repeatedly in the past in
regards to TSM and have always been very happy with the results. So the
issue here isn't really what to use or not but rather whether there's any
pro's or con's on the way you go about creating volumes on a RAID5 array.
E.g. lots of smaller volumes or fewer large volumes? Having lots of RAID5
arrays as was also suggested isn't really practical because these days it's
rare you don't have fairly large disks (18 or 36GB each) so in that example
of 100GB you're really only talking 1 RAID5 array of 4-5 disks. 

Bottom line is I was just speculating out loud perhaps on whether there were
any pro's or con's to how many volumes and what size one would make the
volumes on a RAID5 array. Say you had a 100GB RAID5 array. Would you create
10 10GB volumes or 2 50GB volumes? Does it matter since it's all just going
into a big array?

Regards,

Gerald Wichmann
Senior Systems Development Engineer
Zantaz, Inc.
925.598.3099 (w)