Continuous Access Xp Volume Pair Status; Group Operations - HP StorageWorks XP12000 User Manual

Copy pending timeout
This group option specifies maximum delay allowed for Continuous Access XP Async copy operations.
The RCU suspends all S-VOLs in the group when:
• The RCU has not had any communications from the MCU within the specified time. This situation
might indicate a disaster or failure at the primary site.
• The RCU has received recordsets from the MCUs but has not been able to settle a particular
recordset within the specified time. This situation might indicate the RCU does not have enough
resources to handle remote copy and I/O workloads.
RCU ready timeout
This group option specifies maximum delay allowed for re-establishing MCU-RCU communications
following MCU power-off. During MCU power-on, the MCU re-establishes communications with all
registered RCUs. If the MCU cannot re-establish communications with an RCU within the specified time,
the MCU suspends all affected Continuous Access XP Asynchronous volume pairs.

Group operations

Continuous Access XP Asynchronous provides the following group-based operations to simplify and
expedite disaster and failure recovery procedures:
• Group operations at the MCU:
• Split (pairsplit-r) all pairs in a consistency group. See
(Pairsplit-r)
• Resume (pairresync) all split or suspended pairs in a group. See
Access XP volume pairs (Pairresync)
Range-Group pairresync option.
• Delete (pairsplit-S) all pairs in a group.
Group operations at the RCU:
•
• Split (pairsplit-r) all pairs in a consistency group. See
(Pairsplit-r)
• Delete (pairsplit-S) all split or suspended pairs in a consistency group except inconsistent pairs.
• Delete (pairsplit-S) all pairs in a group regardless of their consistency status.
Continuous Access XP also provides the Error Level pair option (see
and pair options of the Paircreate
group. When a Continuous Access XP Async pair is suspended due to failure (not user-requested), this
Continuous Access XP pair option determines whether all pairs in the same consistency group are also
suspended. If you selected the Group error level for the Continuous Access XP Async pair, all pairs in
the same group are suspended. If you selected the LU error level, only the affected Continuous Access
XP Async pair is suspended.
The Error Level pair option is very important for managing Continuous Access XP Asynchronous groups
and planning disaster recovery. The Group error level should be selected for all Continuous Access XP
Async volumes essential to disaster recovery. Suspended Continuous Access XP Async S-VOLs with the
LU error level should not be used for disaster recovery because they are not consistent with the rest
of the volume group.

Continuous Access XP volume pair status

Continuous Access XP displays pair status for each volume in the selected logical CU image (CUI) of the
connected array.
the status of the P-VOL and can change the pair status of the P-VOL and S-VOL. The RCU maintains the
status of the S-VOL and can change the pair status of the S-VOL but not the P-VOL. The MCU detects when
the RCU changes the S-VOL status (if path status is normal) and changes the P-VOL status accordingly.
You can display detailed pair status information using the Command View XP management station
for a description of the Suspend Range-Group pairsplit-r option.
for a description of the Suspend Range-Group pairsplit-r option.
pane), which triggers automatic suspension of an entire consistency
Table 7 describes Continuous Access XP pair status descriptions. The MCU maintains
Splitting Continuous Access XP pairs
for a description of the Continuous Access XP Resume
Splitting Continuous Access XP pairs
Continuous Access XP user guide
Resuming Continuous
Continuous Access XP initial copy
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