Hi  Eric,

For your question, the answer is:  ' dsmfmt -data ' creates a XX+1MB  file

If your 36 GB disks are for disk pools, did you ever think about using RAW
devices instead.
Perfs are better because you have not the JFS overhead. In counterparse,
you need to migrate
you disk data everyday to your tapes to prevent hardware failure (execpt if
you have a RAID volume)


Herve





"Loon, E.J. van - SPLXM" <Eric-van.Loon AT KLM DOT COM>@VM.MARIST.EDU> on
2001-11-21 15:53:38

Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>

Sent by:  "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>


To:   ADSM-L AT VM.MARIST DOT EDU
cc:
Subject:  dsmfmt question


Hi *SM-ers!
I will replace my 9 Gb. SSA disks in the very near future. The new disks
(36
Gb. 10.000 rpm) will have to be added to the diskpool one by one.
I remember from the last time that it was quite difficult to allocate a
disk
file which fills the disk completely. If you have, for instance, a 9 Gb.
disk, you cannot create a 9 Gb. file by issuing a DSMFMT -G -DATA filename
9. This results in an error indicating the there isn't enough space
available. Apparently the dsmfmt utility needs a little bit overhead space.
Does anybody know how to calculate the maximum space one can specify to
fill
the disk to it's maximum?
Thanks in advance for any reply!!!
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines


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