Table 1 describes utility support when the UTILITY
parameter is specified with either FIX or FLOAT and the XADDPAIR command
with a secondary volser is not XRCUTL:
Table 1. Specifying UTILITY(FIX or
FLOAT) and the XADDPAIR command with a secondary volser that is not
XRCUTL| If . . . |
Then . . . |
|---|
| The primary volser is not in
the session. |
The primary volser is added to the
session. |
| The primary volser is already in
the session and its secondary volser is XRCUTL, but it is not a fixed
utility device. |
The XADDPAIR command processes normal
volume initialization. |
| The primary volser is already in
the session, its secondary volser is XRCUTL and it is a fixed utility
device. |
The XADDPAIR command is rejected,
with return code 4082. |
| The primary volser is already in
the session and its secondary volser is not XRCUTL. |
The XADDPAIR command is rejected
with either:
- Return code 490, if the new secondary volser matches an existing
secondary volser.
- Return code 489, if the new secondary volser is different that
an already existing secondary volser.
|
If the following situations occur, a storage control
session for a utility volume is converted to an Enhanced Auxiliary
session:
- AllowEnhancedReader(YES) is specified.
- The storage control session is currently in SINGLE mode.
- The SCSESSION value is different from the value originally specified
for the volume.
- The new SCSESSION value corresponds to an Enhanced Primary session.
If the following situations occur, a storage control
session for a utility volume is converted to an Enhanced Primary session:
- AllowEnhancedReader(YES) is specified.
- The storage control session is in SINGLE mode.
- The SCSESSION value is the same as the value originally specified.
Storage control sessions suspend whenever all volume
pairs in the XRC session are suspended. As a result, utility volumes
(XRCUTL) suspend as well. In addition, when the last data volume is
suspended in a storage control session, this causes the utilities
associated with that storage control session to suspend as well. Further,
anytime a data volume is suspended, any storage control session that
has no data volumes associated with it will also be suspended.