HP XP7 Storage - Manual (Page 154)

PVOL-SMPL-takeover. PVOL-takeover can be specified per paired logical volume or per volume
group.
Continuous Access Asynchronous/Continuous Access Journal Specific behavior for svol-takeover
PVOL-Takeover will not be executed. It will become a Nop-Takeover, since the Fence Level will be
Async which is equal to Never so it is not needed to allow pvol writes.
Continuous Access Synchronous remote commands
Figure 50 (page 154) illustrates a Continuous Access Synchronous remote configuration. The RAID
Manager Continuous Access Synchronous remote commands assist the system operation with
volume backups among UNIX servers and their operating system management functions. The
Continuous Access Synchronous remote pair commands are also used to copy volumes in server
failover configurations and to restore the volumes to their original state after a server failover has
been recovered.
•
Pair creation command: Creates a new volume pair. Volume pairs can be created in units of
volume or group.
•
Pair splitting command: Splits a volume pair and allows read and write access to the secondary
volume.
•
Pair resynchronization command: Resynchronizes a split volume pair based on the primary
volume. The primary volume remains accessible during resynchronization.
◦ Swaps(p) option (Continuous Access Synchronous only). Swaps volume from the
SVOL(PVOL) to the PVOL(SVOL) when the SVOL(PVOL) is in the suspended state and
resynchronizes the NEW_SVOL based on the NEW_PVOL. At the result of this operation,
the volume attributes of the host of reference (local host) are used as the attributes for the
NEW_PVOL(SVOL).
•
Event waiting command: Used to wait for the completion of volume pair creation or
resynchronization and to check the pair status.
•
Pair status display and configuration confirmation command: Displays the pair status and
configuration of the volume pairs and is used for checking the completion of pair creation or
pair resynchronization.
Figure 50 Continuous Access Synchronous remote system configuration
154 Data replication operations with RAID Manager