Continuous access synchronous operations, Continuous access synchronous takeover commands – HP XP RAID Manager Software User Manual
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Restriction for Continuous Access Synchronous/Business Copy cascading volumes
Pair restore (resynchronization from S-VOL (oradb1) to S/P-VOL) can only be performed when the
Continuous Access Synchronous S-VOL (oradb) and the P-VOL (oradb2) on the S/P-VOL are in the
SMPL or PSUS(SSUS) state. If pairresync of S-VOL (oradb1) is performed when the S/P-VOL (oradb
or oradb2) is in any other state, the pairresync -restore option command is rejected with EX_CMDRJE
or EX_CMDIOE.
Continuous Access Synchronous operations
RAID Manager Continuous Access Synchronous commands operate in conjunction with the software
on the UNIX/PC servers and the Continuous Access Synchronous functions of the RAID storage
systems. The RAID Manager software provides failover and other functions such as backup
commands to allow mutual hot standby in cooperation with the failover product on the UNIX/PC
server (e.g., MC/ServiceGuard, FirstWatch, HACMP).
NOTE:
For proper maintenance of Continuous Access Synchronous operations, it is important to
determine if there are any faults in paired volumes, recover the volumes from the failures as soon
as possible, and continue operation in the original system.
NOTE:
For information about the operational requirements and specifications for Continuous
Access Synchronous, please see the HP P9000 Continuous Access Synchronous User Guide for
your storage system.
Continuous Access Synchronous takeover commands
illustrates a high-availability (HA) environment. When a server software error
or a node error is detected, the HA failover software causes the cluster manager (CM) to monitor
server programs and causes the CM of the standby node to automatically activate the HA control
script of the corresponding server program. The HA control script usually contains database recovery
procedures, server program activation procedures, and other related recovery procedures. The
Continuous Access Synchronous RAID Manager takeover commands are also activated by the HA
control script.
130 Data replication operations with RAID Manager