HP StorageWorks XP Remote Web Console Software User Manual
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you mix these two types of pairs, the pairsplit operation may terminate abnormally or the
S-VOLs of the P-VOLs in the same consistency group may not be correctly created when the
pairsplit request is executed.
To enable the At-Time Split function using RAID Manager, follow these steps:
1.
Edit the RAID Manager configuration definition file so that the XP Business Copy pairs belong
to the same consistency group.
2.
Execute the RAID Manager paircreate command, specifying the option for using the At-Time
Split function.
The XP Business Copy pairs for the At-Time Split function are created.
3.
Execute the pairsplit command using RAID Manager.
Data contained in the P-VOLs when the pairsplit command executes are copied to S-VOLs.
If the At-Time Split option is enabled, the data in all P-VOLs (in the same consistency group) is
created in the corresponding S-VOLs at the time when the pairsplit request is received by the storage
system.
If the At-Time Split option is disabled, the pairsplit operation does not ensure that S-VOLs will be
created from P-VOLs in the same consistency group. The At-Time Split option is disabled if you
perform XP Business Copy pair operations from the Remote Web Console computer on the XP
Business Copy At-Time Split pairs created by RAID Manager.
For detailed information, see the HP RAID Manager User Guide.
If the At-Time Split function using RAID Manager fails, the following problems will occur:
•
When the pairsplit operation by RAID Manager ends abnormally, all the XP Business Copy
pairs in the same consistency group will be suspended (status = PSUE).
•
When the host server is down or has failed, a consistency group with no XP Business Copy
pairs may be defined. If you execute the paircreate command with the At-Time Split option
under such a condition, the paircreate command might be rejected. In this case follow these
steps:
◦
Locate a consistency group number that is not used by any pairs on the Pair Operation
window by sorting the CTG column.
◦
Specify that consistency group number explicitly and execute the paircreate command
with the At-Time Split option using RAID Manager on the host server.
Troubleshooting At-Time Split function using RAID Manager:
Use Case: Using an XP Continuous Access Journal S-VOL as an XP Business Copy P-VOL:
If the status of some pairs belonging to a consistency group cannot be changed, the Pairsplit
command of RAID Manager can end abnormally with the error code EX_EWSTOT. This error
indicates that a timeout has occurred. Probable reasons why the pair status cannot be changed
are:
•
The XP Continuous Access Journal pair belongs to a consistency group. The P-VOL and the
S-VOL of this pair have the same contents. The journal volumes for this pair are full.
•
The XP Business Copy license is invalid.
•
Volumes of the XP Business Copy pair are blocked.
•
The XP Business Copy pair is in a status in which the Pairsplit operation is unavailable. See
.
•
The XP Business Copy pair is a part of cascaded pairs. The other pairs in the cascaded pairs
are in a status in which the Pairsplit operation is unavailable. See
and
.
•
A volume in the XP Business Copy pair is used as an XP Continuous Access or an XP Continuous
Access Journal volume. The XP Continuous Access or XP Continuous Access Journal pair is in
a status in which the Pairsplit operation is unavailable. See
.
Splitting Pairs
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