HP XP7 Storage - Manual (Page 77)

S-VOL access P-VOL access Description BCM status RWC status
No Read/Write DUPLEX (02) Duplex • The pair is synchronized
•
Updates from the host to the P-VOL are duplicated in
the S-VOL.
Read Only if
Mode=20 is Read/Write SUSPOP (03),
SUSPOP (04), Suspended
(See also “Split
types”
(page 78)
.)
•
The pair was split by a user. The pair is not
synchronized.
SWAPPING (04),
SUSPOP (05),
SUSPER (07),
SUSPOP (0A) ON, otherwise
No.
•
When you split the pair from the primary system, that
system changes the status of the P-VOL and S-VOL to
Suspended.
• In Suspended status, updates to the S-VOL stop. The
storage system keeps track of updates to the P-VOL
in order to update the S-VOL when the pair is
resynchronized.
•
When you split the pair from the secondary system,
that system changes the status of the S-VOL to
Suspended. The primary system detects this and
changes P-VOL status to Suspended.
•
When you release the pair from the secondary
system, that system changes the S-VOL status to
Simplex. The primary system detects this and changes
the P-VOL status to Suspended. The pair must be
released from the primary system in order to change
P-VOL status to Simplex.
BCM split statuses initiated by the user:
• SUSPOP (O3): The user split the pair from the P-VOL.
•
SUSPOP (04): The user split the pair from the S-VOL.
If the P-VOL is updated, it is recorded as differential
data.
• SWAPPING (04): The user split the pair in the reverse
direction (S-VOL to P-VOL).
•
SUSPOP (05): The secondary system received a split
request from the main system and split the pair.
•
SUSPER (07): The user deleted the pair from the
secondary system. The main system detected this and
split the P-VOL.
• SUSPOP (0A): The pair was split because the user
issued PPRC’s FREEZE command on the main system.
Read Only if
Mode=20 is Read/Write.
Read only if
Primary
SUSPCU (06) (by
error), SUSPCU
(08), SUSPER (09),
SUSPER (50) Suspended
(See also “Split
types”
(page 78)
.)
• If the primary system cannot keep the pair
synchronized for any reason, it changes the status
of the P-VOL and S-VOL (if possible) to Suspended.
ON, otherwise
No.
Volume Fence
Level is Data. • The pair is not synchronized.
BCM also includes the following:
•
SUSPCU (08): The pair was split when the main
system detected an error during the communication
with the secondary system, or detected an I/O error
during update copy.
•
SUSPER (09): The pair was split because the main
system detected volatilization of pair control
information on memory when power was ON (IMPL).
This error occurs when power-off status of the main
system continues beyond the backup time for the
nonvolatile memory.
•
SUSPER (50): The pair was split because data
mismatch between P-VOL and S-VOL was detected
during the initial copy operation. The cause of the
error is invalid track format.
Monitoring pair status, license capacity 77