StorageTek 312564001 User Manual

Page of 189
 
24 
DB2 Manager User Guide 
 StorageTek 
Proprietary 
Primary or secondary DB2 Manager tape datasets will be released under the 
following circumstances: 
•  The Archive Manager tape backup utility will automatically uncatalog 
backup datasets which are being recreated during the migration process 
(this will occur when objects are added to a partially-used volume during 
the migration process; the backup of the partially-used volume will be 
released). 
•  The Archive Manager tape database management utility will release 
volumes from within a storage group database which contain less than a 
user-supplied threshold of active objects.  Released volumes will be 
automatically uncataloged by the utility if the AUTOUNCAT option has 
been specified for that storage group database via the Archive Manager 
database maintenance facility. 
h. Perform STK Host Software Component (HSC) changes. 
The relevant modifications should be made to the HSC software which 
controls operation of the StorageTek library configuration and environment, in 
order to ensure that scratch tapes used during the DB2 Manager object 
migration process are located within the library configuration.  All Archive 
Manager tape datasets will have a high level qualifier as specified during the 
Archive Manager database definition procedure (see page 27). 
It is essential for object retrieval processing that all primary volumes within an 
Archive Manager database can be mounted automatically in response to an 
object recall request.  For this reason, all such cartridges should be located 
within a StorageTek library configuration. 
Appropriate controls should also be established to handle creation of backup 
and duplex tape datasets as required (eg) use scratch tapes from non-library 
drives with automatic cartridge loaders (for subsequent storage on library 
shelving), or use scratch tapes from within a remote library configuration (for 
automatic offsite storage). 
Refer to the relevant StorageTek manual, or contact your StorageTek 
Software Support Representative (SSR) for details on how to implement the 
above controls. 
i. Update automated reply software controls. 
Occasionally, it may happen that there are no tape drives available to satisfy 
a request from DB2 Manager for object retrieval from a non-mounted tape 
volume. 
When this occurs, normal allocation recovery processing will be performed by 
the host system control program, resulting in the display of message IEF247I 
followed by the following message: 
IEF238D jjj - REPLY DEVICE NAME, 'WAIT' OR CANCEL' 
While this reply is outstanding, DB2 Manager will be unable to service the 
request which caused allocation recovery to be entered.