Hi Joni,

Have a look to your storagepool definition with "q stg f=d"

            Migration Processes: 4
              Next Storage Pool: WP_AZV01
           Reclaim Storage Pool:
         Maximum Size Threshold: 500 M
                         Access: Read/Write
                    Description: dp_azv01
              Overflow Location:
          Cache Migrated Files?: Yes
                     Collocate?:
          Reclamation Threshold:
Maximum Scratch Volumes Allowed:
  Delay Period for Volume Reuse:

You can update your storagepool definition with "upd stg"

regards

Michael
-----Ursprüngliche Nachricht-----
Von: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] Im Auftrag 
von Joni Moyer
Gesendet: Mittwoch, 17. August 2005 14:19
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: Re: [ADSM-L] Migration Speed Has Plummeted


Hello Everyone!

How do you know if caching is turned on?  How/where can you turn it off?  I
am having lousy migration speed perfomance as well.  What can I look
at/change?  I have an AIX 5.2 server at TSM 5.2.4.0 with LTO2 tape drives
attached.  Thanks!

********************************
Joni Moyer
Highmark
Storage Systems
Work:(717)302-6603
Fax:(717)302-5974
joni.moyer AT highmark DOT com
********************************



             "David E
             Ehresman"
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             08/17/2005 08:09
             AM


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>We back up around  220 Gb of data to the disk pool overnight, then migrate
>(with caching on) to cartridge in the morning.
>

I assume you mean TSM storage pool caching rather than 3390 caching.  If
so, I'd turn off caching for a day and see if that makes a difference.  It
is my understanding that TSM caching, while optimizing restore times, can
cause performance problems in other TSM areas.

David