S-VOL
access
P-VOL accessDescriptionPair status
Read Only,
unless write
option is
enabled.
Read/WriteThe user has split the pair or released the pair; the pair is no
longer synchronized.
• The primary and secondary systems keep track of journal data
discarded during the pairsplit operation.
• When the operation is performed at the primary system, the
status of both the P-VOL and S-VOL change to PSUS.
• When the operation is performed at the secondary system,
the status of the S-VOL changes to PSUS; the primary system
detects this (if path status is normal) and changes P-VOL status
to PSUS.
• When a pair is released from the secondary system, the
secondary system changes the status of the S-VOL to SMPL.
The primary system detects this (if path status is normal and
changes P-VOL status to PSUS. (The pair must be released
from the primary system to change P-VOL status to SMPL.)
See “PSUS types and behaviors” (page 71) for PSUS types.
PSUS
Read OnlyRead/write;
Read only if
fenced.
The pair is suspended due to an error; the pair is not
synchronized.
• The primary and secondary systems keep track of any journal
data that are discarded during the suspension operation.
• The primary system keeps track of P-VOL tracks that are
updated while the pair is suspended.
• When a Cnt Ac-J suspension condition is detected, the primary
system changes P-VOL and S-VOL status to PSUE. If the
secondary system detects the condition, it changes the S-VOL
status to PSUE; the primary system detects this and changes
P-VOL status to PSUS.
See “PSUE types and behaviors” (page 72)for PSUE types.
PSUE
Read OnlyRead/WriteThe pair is not synchronized. The pair is in transition to
PSUS/PSUE.
Suspending
Read OnlyRead/WriteThe pair relationship is being deleted. When the operation is
completed, status changes to SMPL.
Deleting (releasing)
Read/Write
*2
Read/Write
*1
• The pair or command devices are ready for the delta resync
operation. When the status of the Cnt Ac-J P-VOL is HOLD,
incoming write data for the Cnt Ac-S S-VOL is stored in the
master journal volume.
• Operations allowed on the pairs in HOLD status:
- Delta resync
- Pair-delete
- Changing pair options
HOLD
68 Monitoring the system
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