HP XP7 Storage - Manual (Page 66)

Description Volume PSUS type applies
to PSUS type
RAID Manager displays this PSUS type as SSWS.
S-VOL PSUS, by MCU • The secondary system received a request from the primary
system to split the pair.
•
The P-VOL PSUS type is PSUS-S-VOL by Operator.
•
RAID Manager displays this PSUS type as SSWS.
P-VOL, S-VOL PSUS, by RCU •
The primary system suspended the pair after detecting an
error condition on the secondary system.
• The S-VOL suspend type is PSUE-S-VOL Failure.
•
RAID Manager displays this PSUS type as PSUE.
The primary system detected that S-VOL is unpaired after the
user released the pair from the secondary system. The pair
cannot be resynchronized. P-VOL PSUS, Pairsplit-S to RCU
The pair was suspended because the journal volume was near
capacity.
•
RAID Manager displays this PSUS type as SSWS.
P-VOL, S-VOL PSUS, JNL Cache
Overflow
•
A pair can be split after the initial copy is complete.
•
A pair must be split to perform maintenance on the P-VOL, or to enable write-access on the
S-VOL.
•
After status changes to PSUS, the primary system performs the following tasks:
Stops journal-obtain operations ◦
◦ Continues to accept write I/Os from host to P-VOL
◦ Keeps track of updated P-VOL tracks
•
If you enable the S-VOL write-option when splitting the pair, the secondary system keeps track
of updated S-VOL tracks. When the pair is resynchronized, the secondary system sends the
S-VOL track bitmap to the primary system, which then merges P-VOL and S-VOL bitmaps to
synchronize the tracks.
•
A split or suspended S-VOL has a separate consistency status, which indicates the S-VOL’s
update sequence consistency with respect to the other S-VOLs in the associated journal.
Consistency status displays on the secondary system only. S-VOL consistency status is described
below.
66 Monitoring the Cnt Ac-J system