HP StorageWorks XP24000/XP20000 Continuous Access Software User Guide (T5278-96049, November 2011)

Table 9 XP Continuous Access Pair Status (continued)
S-VOL AccessP-VOL AccessDescriptionPair Status
Table 10 (page
33) for split
types)
and RCU record the data in P-VOL and S-VOL tracks
that are updated as the differential data.
• When you split a pair from the MCU, the MCU
changes the status of the P-VOL and S-VOL to PSUS.
When you split a pair from the RCU, the RCU
changes the status of the S-VOL to PSUS. The MCU
detects this (if path status is normal) and changes
the P-VOL status to PSUS.
• When you release a pair from the RCU, the RCU
changes the S-VOL status to SMPL. The MCU detects
this (if the path status is normal) and changes the
P-VOL status to PSUS. You must release the pair from
the MCU to change the P-VOL status to SMPL.
Read onlyRead/write;This pair is not synchronized, because the MCU or
RCU has suspended the pair due to an error condition.
PSUE
(pair
suspended-error)
Read only if P-VOL
Fence Level option
is Data.
For Async pairs the MCU and RCU keep track of any
recordsets that were discarded during the suspension
operation. The MCU records the data in the P-VOL
(see
Table 12 (page
tracks that are updated while the pair is suspended as
differential data.
35) on page
Table 12 (page
• For XP Continuous Access Synchronous pairs, if the
MCU cannot keep the pair synchronized for any
35) for suspend
types)
reason, the MCU changes the status of the P-VOL
and S-VOL (if possible) to PSUE.
• For XP Continuous Access Asynchronous pairs, if
the MCU detects an XP Continuous Access
Asynchronous suspension condition, the MCU
changes the P-VOL and S-VOL status (if possible) to
PSUE.
• For XP Continuous Access Asynchronous pairs, if
the RCU detects an XP Continuous Access
Asynchronous suspension condition, the RCU
changes the S-VOL status to PSUE, and the MCU
detects this (if the path status is normal) and changes
the P-VOL status to PSUE.
Pair Status for XP Continuous Access LUSE volumes only:
Read onlyRead/writeThis XP Continuous Access pair consists of LUSE
volumes (for example, OPEN3*n), and an individual
PDUB
LDEV within this XP Continuous Access LUSE pair has
failed due to an error condition. The status of the XP
Continuous Access LUSE volume is PAIR or COPY, and
the status of one or more LDEV pairs is PSUE or SMPL.
Pair Status for XP Continuous Access Asynchronous only:
Read onlyRead/writeThis pair is not synchronized. This pair is in transition
from PAIR or COPY to PSUS/PSUE. When the
Suspending
split/suspend pair operation is requested, the status of
all affected pairs changes to Suspending. When the
split/suspend operation is complete, the status changes
to PSUS/PSUE.
Read onlyRead/writeThis pair is not synchronized. This pair is in transition
from PAIR, COPY, PSUS, or PSUE to SMPL. When the
Deleting
pairsplit-S operation is requested, the status of all
affected pairs changes to Deleting. When the pairsplit-S
operation is complete, the status changes to SMPL.
32 About XP Continuous Access Operations