'Waiting for access to volume'

Hallo TSM'ers,

During a 'backup stgpool' I saw the following situation;


 Process     Process Description      Status
  Number
--------     --------------------
-------------------------------------------------
     458     Backup Storage Pool      Primary Pool ONSITE, Copy Pool
                                       RMM, Files Backed Up: 5133, Bytes
                                       Backed Up: 146,232,434,534,
Unreadable Files: 0,
                                       Unreadable Bytes: 0. Current
Physical File
                                       (bytes): 2,097,424,832~Waiting
for access to
                                       input volume SH0353 (4728
seconds).~Current
                                       output volume: PH0094.\

     459     Backup Storage Pool      Primary Pool ONSITE, Copy Pool
                                       RMM, Files Backed Up: 271, Bytes
                                       Backed Up: 309,392,758,143,
Unreadable Files: 0,
                                       Unreadable Bytes: 0. Current
Physical File
                                       (bytes): 2,097,424,836~Current
input volume:
                                       SH0353.~Current output volume:
PH0235.\


Now, as far as I was aware, TSM organised itself such that the above
situation shouldn't happen. IE, the 459 process should have been tasked
with copying all the required data from SH0353, and the 458 process
should not have been assigned the job of backing up any data on SH0353.

Am I wrong in this?  One thing I can think of that may have caused this
to happen is that SH0353 holds an 'incomplete' file right at the end,
and that file is required for proc 458's backup task. Still, in that
case, I would expect the split file to be allocated to the 459 process
instead...?

Thanks,

Matt.


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