HP XP Continuous Access Software - Manual (Page 351)

HA Failover and failback 351
function returns SVOL-SSUS-takeover as the return value of horctakeover
command.
If there is a Host failure, this function returns as swap-takeover.
If an ESCON/FC link or P-VOL site failure occurs, this function returns as
SVOL-SSUS-takeover.
If SVOL-takeover is specified for a group, the data consistency check
executes for all volumes in the group. Inconsistent volumes are displayed in
the execution log file.
Example
Group Pair vol Port targ# lun# LDEV#...Volstat Status Fence To be..
oradb1 /dev/dsk/hd001 CL1-A 1 5 145...S-VOL PAIR NEVER Analyzed
oradb1 /dev/dsk/hd002 CL1-A 1 6 146...S-VOL PSUS STATUS Suspected
Async-CA extended specific behavior
The S-VOL side RM issues a suspend for swapping operation to the S-VOL
side of the disk array. The non-transmitted data of the primary volume
copies to the S-VOL side and a resync for swapping operation runs after the
copy process.
If there is a host failure, this data-synchronize operation runs and the
SVOL-takeover function returns as swap-takeover by running a resync for
swapping operation.
If an ESCON/FC link or P-VOL site failure occurs, this data-synchronize
operation could fail. Even so, the SVOL-takeover function performs a
suspend for swapping operation and enables the secondary volume to be
used. This function returns as SVOL-SSUS-takeover. The non-transmitted
data of the primary volume is not transmitted completely when
SVOL-takeover returns SVOL-SSUS-takeover.
The SVOL-takeover operation is required to copy non-transmitted P-VOL
data within a given timeout value specified by the –t timeout option.
If the timeout occurs before S-VOL takeover has completed all S-VOL
changes to the SSWS state, the horctakeover command fails with
EX_EWSTOT.