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DB2 Manager User Guide 91
StorageTek Proprietary
Archive Manager database recovery may be required in the following
circumstances:
1. loss of an individual tape volume from with an Archive Manager tape
database (eg) due to media failure
2. loss of an entire Archive Manager database (eg) due to loss of data
center.
In both the above cases, standard Archive Manager database recovery
procedures should be followed. A full description of these procedures may
be found in the ‘Recovery Control Processing’ section in the Archive Manager
User Manual.
The procedure in each case is summarized below:
1. Loss of individual tape volume(s)
Identify the dataset sequence number(s) of the tape volume(s) which
have become unavailable. A tape volume’s dataset sequence number
may be obtained from the name of the dataset contained on that volume.
Refer to “Archive Manager database backup and recovery” on page 89
for a description of Archive Manager dataset naming standards.
Set each sequence number (or range of sequence numbers) in recovery
status, using the standard Archive Manager database administration
dialog for the database containing the unavailable volumes. The copy to
be used for recovery (‘B’, ‘C’ or ‘D’) is established during this process.
Archive Manager will automatically access the appropriate backup copy
when retrieving objects from all volumes which have been placed in
recovery status.
The primary copy of all volumes which are in recovery status should be
re-created at a subsequent time using the Archive Manager database
recovery utility OTASP130. This utility will automatically remove a volume
from recovery status after its primary copy has been re-created. Volumes
may be manually removed from recovery status at any time via the
Archive Manager database administration dialog.
2. Loss of entire database
If an entire database has been lost (due to hardware malfunction or loss
of data center), the database must be placed in ‘disaster recovery’ status
via the standard Archive Manager database administration dialog. The
copy to be used for disaster recovery (‘B’, ‘C’ or ‘D’) is specified during
this procedure.
When a database is in disaster recovery status, all retrievals by Archive
Manager from that database will be performed from the appropriate
backup copy. In order to guarantee the continuance of established
service levels for DB2 applications, all volumes in that copy of the
database should be available for automated processing.