HP XP Continuous Access Software - Manual (Page 350)

350 HP StorageWorks Disk Array XP RAID Manager: User’s Guide
3. The swap operation is performed.
The swap operation must copy non-transmitted P-VOL data within the
timeout value specified by the –t timeout option.
4. The swap command returns after the synchronization between the
P-VOL and S-VOL.
XP256 microcode 52-47-xx and over
XP512/48 microcode 10-00-xx and over
XP1024/128
XP10000
XP12000
1. The S-VOL side RM issues a “suspend for swapping” to the S-VOL
side disk array.
2. Non-transmitted data that remains in the FIFO queue (sidefile) of the
P-VOL is copied to the S-VOL side.
3. A “resync for swapping” operation is performed.
The swap operation must copy non-transmitted P-VOL data within the
timeout value specified by the –t timeout option.
SVOL-takeover function
This function enables the takeover node to have exclusive access to the
S-VOL volume in SSUS (PSUS) state (reading and writing are enabled),
except in COPY state, on the assumption that the remote node, controlling
the P-VOL, is unavailable or unreadable.
The data consistency of the secondary volume is judged by its pair status
and fence level. If the data consistency check fails, the SVOL-takeover
function fails.
You can specify SVOL-takeover at the granularity of a paired logical
volume or group.
If this check proves that the data is consistent, this function runs to switch
to the primary volume using a Resync for Swapping. If this switch
succeeds, this function returns with swap-takeover. Otherwise, this