HP XP7 Continuous Access Synchronous User Guide (TK911-96004)

S-VOL accessP-VOL accessDescriptionRAID Manager
status
RWC status
Read OnlyRead/WritePAIRPAIR
• The pair is synchronized
• Updates from the host to the P-VOL are duplicated in
the S-VOL.
Read only if
S-VOL write
Read/WriteSSUS, PSUSPSUS
(See also “Split
types”
(page 62).)
• The pair was split by a user or deleted from the
secondary system. The pair is not synchronized.
option is
disabled.
Read/Write if
S-VOL write
• When you split the pair from the primary system, that
system changes the status of the P-VOL and S-VOL to
PSUS.
• In PSUS 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.
RAID Manager also shows P-VOL status as PSUS.
option is
enabled.
• When you split the pair from the secondary system,
that system changes the status of the S-VOL to PSUS.
The primary system detects this and changes P-VOL
status to PSUS.
RAID Manager shows the S-VOL status as SSUS.
• When you release the pair from the secondary
system, that system changes the S-VOL status to SMPL.
The primary system detects this and changes the
P-VOL status to PSUS. The pair must be released from
the primary system in order to change P-VOL status
to SMPL.
• RAID Manager PSUS status indicates that although
the paired status is retained, the user split the pair.
This status is only for the P-VOL. While the pair is
split, the storage system keeps track of updates to
the P-VOL in the differential bitmaps.
Read OnlyRead/Write.PSUEPSUE
• 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 PSUE.
(See also “Split
types”
(page 62).)
Read only if
Primary
Volume Fence
Level is Data.
• The pair is not synchronized.
1
When pair status is COPY, neither cache nor shared memory can be added to or removed from the storage system. When
either of these tasks is to be performed, first split any pairs in COPY, status, then resynchronize when the cache or shared memory
operation is completed.
Monitoring pair status, license capacity 61