Re: how to keep all data on disk for quicker restores

Paul,

There are a number of SCSI-IDE or FC-IDE raid arrays out there.
One of these I was looking at had 16 slots and 16 IDE busses, with 200GB disk 
on each.  Thats 3TB of disk.It also had virtual tape support - which on the 
surface seems intriguing too.

If this was configured mostly as TSM sequential file storage, on a filesystem 
with huge capacity (AIX JFS2 for instance), then you could possibly get away 
with what your management wants and only have to do a selective say  once every 
three months to keep the active data on disk.  This is where a "migrate 
inactive" command would be handy.

Now such disk subsystems aren't cheap, but compared to Enterprise class EMC or 
IBM arrays they are peanuts and sequential backup pool performance won't be 
much of an issue.

I know people have talked about this sort of thing on the list before.  Is 
anybody doing it?

Steve Harris
AIX and TSM Admin
Queensland Health, Brisbane Australia 

>>> PCoviello AT CMC-NH DOT ORG 27/09/2002 6:00:22 >>>
Hi as the subject refers to "how to keep all data on disk for quicker
restores"  I have been tasked, again, to change the way TSM operates and to
do a scheduled full backup once a week and incrementals in between. ( stop
laughing! )
we currently have an H70 running AIX with an ATL P2000 100 tape library.
and others in the dept want to have data so that at any point we can restore
a system from disk. and not tape unless of a disaster.  we currently have
vers set for 30 and no co-location. our diskpool is currently 60gb  we seem
to backup approx 80gb a night.

  if anyone would like to share thier thoughts... because mine are going
very quickly

thanks
Paul

        Paul J Coviello
        Sr Systems Analyst
        Catholic Medical Center
        2456 Brown Ave
        Manchester, NH 03103
        603 663-5326



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