HP A.06.11 - Manual (Page 228)

When the util_file_online option is used with BRBACKUP (for example, if you
select the Brbackup_Util_File_Online template), the tablespaces are switched
into/from backup mode individually. As there can be only one process communicating
with BRBACKUP, several sapback processes are using a semaphore to synchronize
their interaction with BRBACKUP.
The number of sapback processes is calculated as the sum of concurrencies of all
devices used for backup. With a large number of sapback processes, the maximum
number of processes that can have undo operations pending on any given IPC
semaphore on the system may be exceeded. In such case, several sapback agents
will fail with the following error:
[28] No space left on device.
Action
Perform any of the following actions to resolve the problem:
• Reduce the number of backup devices or their concurrency.
• Increase the value of the semmnu kernel parameter. After you increase the value,
rebuild the kernel and reboot the system.
Problem
Backup fails with “Connect to database instance failed”
If you start a backup while the database instance is in the unmount or mount mode,
the session fails with a message similar to the following:
BR0301E SQL error -1033 at location BrDbConnect-2
ORA-01033: ORACLE initialization or shutdown in progress
BR0310E Connect to database instance HOOHOO failed
Action
Before you start a backup, ensure that the database instance is in the open or
shutdown
mode.
Restore problems
At this stage, you should have performed all the verification steps described in the
previous sections. After this, proceed as follows:
Integrating SAP R/3 and Data Protector 228