Hp 3PAR Operating System Software Manual do Utilizador Página 139

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1. The source-array target-port group state is changed to standby, and any blocked I/O is returned
to the host with a sense error:
NOT READY, LOGICAL UNIT NOT ACCESSIBLE, TARGET PORT IN STANDBY STATE
2. The host performs SCSI inquiry requests to detect which target port groups have changed and
which paths are now active.
3. Host I/O begins to be serviced on the active path to the primary-reversed array.
Figure 48 I/O Service Starts
During role reversal, the following actions occur (see Figure 49 (page 140)):
The source array sends a remote recover request to the primary-reversed array.
The primary-reversed array performs a recover operation on the remote-copy group.
The source array becomes secondary-reverse.
The remote-copy group gets restarted; replication direction is now from primary-reversed to
secondary-reversed.
HP 3PAR Peer Persistence 139
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