Hitachi TAGMASTORE MK-90RD011-25 User Manual

Page 227

Hitachi Command Control Interface (CCI) User and Reference Guide

209

Failback without recovery on Host B. After recovery of the ESCON/FC link and hosts, if you
stopped the applications without executing the pairresync -swaps command on Host B and
restarted the applications on Host A, you must use the following procedure for recovery. At
this time, pairvolchk command on Host A will be returned PVOL_PSUE & SVOL_PSUS as
state combination.

Delta COPY

Æ PAIR

P-VOL

Host C

Host A

Host B

PAIR

PSUE

PAIR

SSUS

S-VOL

Host C

Host A

Host B

COPY

pairresync

-swapp

on Host A

S-VOL

P-VOL

Host C

Host A

Host B

PAIR

S-VOL

P-VOL

After PAIR

horctakeover

Host C

Host A

Host B

PAIR

P-VOL

S-VOL

Note: The pairresync -swapp option is used to be swapped volume from the PVOL to SVOL at
suspending state on the PVOL side and resynchronizes (cast off original PVOL) the
NEW_SVOL based on the NEW_PVOL. At the result of this operation, the volume attributes of
own host (local host) becomes for the NEW_SVOL. The target volume of the local host must
have the P-VOL, and needs to the remote host for this operation.