Pair status – HP XP Business Copy Software User Manual
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NOTE:
•
You can perform BC pair operations (see
) from the Command View XP
management station or XP Remote Web Console on the BC At-Time Split pairs created by RAID
Manager; however, the At-Time Split option is disabled (the pairsplit operation does not ensure
creating S VOLs of the P-VOLs in the same consistency groups).
•
When the RAID Manager pairsplit operation ends abnormally, all BC pairs in the same consistency
group are suspended (status = PSUE).
•
When the host server is down or has failed, a consistency group with no BC pairs can be defined.
If you execute the paircreate command with the At-Time Split option (-m) under these conditions,
the paircreate command might be rejected. In this case, first find a consistency group number that
is not used by any pairs on the BC main screen by sorting the CTG column (see
). Next,
specify the consistency group number explicitly, and execute the paircreate command with the
At-Time Split option using RAID Manager on the host server.
•
Do not mix pairs created with the At-Time Split option and pairs not created with the At-Time Split
option in the same group defined in the RAID Manager configuration file. If you mix these two
types of pairs, the pairsplit operation might terminate abnormally, or the S-VOLs of the P-VOLs
in the same consistency group might not be created correctly when the pairsplit request is received.
•
If you use the At-Time Split function to split a pair, you can select Quick Split or Steady Split.
NOTE:
After the pairsplit, response time of the first I/O to each logical unit (LU) can be up to approximately
five seconds in the worst case. This worst case should be in a one-to-three BC pair situation and 36
LDEV LUSE configuration.
Pair status
The BC remote console software displays the pair status of all BC volumes (LUs) on the specified port
of the connected disk array. The following figure shows the BC pair status transitions and the
relationship between pair status and BC operations.
Business Copy XP (BC) for the Array
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