Mirror status verification function checks for the presence of
non-duplex volumes in the session. The function also checks duplex
volumes for unexpected XRC device status in the primary storage
subsystem. Exceptions are reported in system messages. Duplex volumes
found to have unexpected device status are immediately suspended.
You can specify the AUTO_READD flag to automatically readd the volumes.
The mirror status verification function is invoked under the following
four circumstances:
- When an XQUERY command with the ACTIVITY parameter is used.
- When the VerifyInterval parameter specified in the XRC PARMLIB
expires.
- When the data mover detects that a cluster failback has occurred
on the primary storage subsystem.
- When the data mover detects that mirroring might have been interrupted
for a duplex volume.
The mirror status verification function issues message ANTX8150I
- ANTX8153I and might suspend volumes. See
z/OS MVS System Messages, Vol 1 (ABA-AOM) for
more information.
Mirror status verification exploits the recordset accumulator query
capability of the primary storage subsystem, if available. To ensure
that the data mover recognizes the capability and provides full verification
function, issue the following command to each XRC session:
XQUERY session_id STO FEATURES
If
a - is displayed, contact your hardware support representative for
information on upgrading microcode to a level that supports write
pacing.