Performing CCI Operations
1–17
Hitachi AMS 2000 Family Command Control Interface (CCI) Reference Guide
•
Figure 1-7: Example of -FHORC Option for Pairsplit
Returned values
Normal termination:
0. When creating groups, 0 = normal termination for all
pairs.
Abnormal termination:
Returns a common error code and a unique error code
for this command. For details on error codes, see
.
Table 1-5: Pairsplit Command Parameters (Continued)
Parameter
Value
Note 1: During TrueCopy and TCE pair operations, there are cases
where pair operations fail because high volume host I/O or frequent
changing of pair status occurs on both local and remote arrays. If a
pair operation fails and pair status does not change, retry the pair
operation (pairvolchk command can be used to check pair status).
If a pair operation fails partially when doing pair operation by
groups, then the operation must be performed for each pair within
that group.
Note 2: When two or more groups, which are specified in the
configuration definition file, exist in the CTG, an instruction to split
the pairs issued to a group specified in the configuration definition
file is executed for the entire CTG.
Note 3: When the TCE pairsplit command is executed, the response
time differs depending on the options.
• pairsplit, pairsplit –S: When the status is PAIR, the response is
delayed depending on the amount of the differential data
• pairsplit –R, pairsplit –mscas: The response is made
immediately after the command is executed.
Note 4: For TCE, using the –d option with the pairsplit –R command
allows you to delete a pair from the S-VOL side. In this case the P-
VOL does not recognize that the S-VOL is in SMPL status. When the
P-VOL tries to send differential data to the S-VOL, it recognizes that
the S-VOL is gone, and the pair becomes PSUE. When one pair in
the CTG becomes PSUE, the other pairs also become PSUE.
However, from the S-VOL side, the PSUE is not seen and pair status
remains PAIR.
Summary of Contents for AMS 2000 Series
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