The TSM 5.5 server for z/OS executes under control of a new kernel using
POSIX threading.  New DISK and TAPE IO drivers were developed to work with
this kernel. The following APARs affecting TSM 5.5 for z/OS have been
addressed and relief  provided using a cumulative ++APAR (AK59448) in eFix
form.
   -  PK59443, PK59445, PK59448, PK64195, IC55464 & PK60796.

Recently, PK64449 was reported and IBM has published the following flash.
http://www-1.ibm.com/support/docview.wss?rs=663&context=SSGSG7&dc=D600&uid=swg21303237&loc=en_US&cs=UTF-8&lang=en

TSM Server version 5.5.0.3 has been released in the form of MVS PTF UK36268
and includes relief for all APARs listed above.  This PTF supersedes the +
+APAR eFix  (AK59448) and should be applied at the earliest convenience.

For detailed information on the APARs please visit our TSM  Server
Technical Support site.
http://www-306.ibm.com/software/sysmgmt/products/support/IBMTivoliStorageManager.html

Please contact IBM Technical Support with any questions.

Sincerely,

Chrisilia Bristow
Level 3 Service Manager
Tivoli Storage Manager Server Development
IBM Software Group, Tivoli
Internet e-mail: davisch AT us.ibm DOT com