Hitachi AMS 2000 User Manual page 195

• This command is issued to TCE; however, the pair to be split is the
SnapShot pair cascaded with the TCE S-VOL.
• This command can only be issued for the TCE consistency group (CTG).
It cannot be issued directly to a pair.
• The TCE pair must be in PAIR status; the SnapShot pair must be in
either PSUS or PAIR status.
• When both TCE and SnapShot pairs are in PAIR status, any pair split
command directly to the SnapShot pair, other than the pairsplit
command with the -mscas option, cannot be executed.
Restrictions
• The operation cannot be issued when the TCE S-VOL is in Synchronizing
or Paired status from a remote host.
• When even a single pair that is under the end operation (delete?
synchronizing?) exists, the command cannot be executed.
• When even a single pair that is under the splitting operation exists, the
command cannot be executed.
• When the pairsplit -mscas command is being executed for even a single
SnapShot pair that is cascaded with a pair in the specified CTG, the
command cannot be executed. The pairsplit -mscas processing is
continued unless it becomes Failure or Pool Full. The processing is
started from the continuation at the time of the next start even if the
main switch of the primary array is turned off during the processing.
Also, review the -mscas restrictions in
page 10-10.
To split the TCE S-VOL/SnapShot V-VOL
In the example, the group name is ora. Group names of the cascaded
SnapShot pairs are o0 and o1.
1. Execute the pairsplit -mscas command to the TCE pair. The status
must be PAIR. For example:
•
c:\horcm\etc>pairsplit -g ora -macas Split-Marker 1
2. Verify that the status of the TCE pair is still PAIR by executing the
pairdisplay command. The group in the example is ora.
•
c:\horcm\etc>pairdisplay –g ora
Group PairVol(L/R) (Port#,TID, LU) ,Seq#,LDEV#.P/S,Status,Fence, Seq#,P-
LDEV# M
ora oradb1(L) (CL1-A , 1, 1 )85000174
ora oradb1(R) (CL1-B , 1, 2 )85000175
3. Confirm that the SnapShot Pair is split using the indirect or direct
methods.
a. For the indirect method, execute the pairsyncwait command to
verify that the P-VOL data has been transferred to the S-VOL. For
example:
Hitachi AMS 2000 Family TrueCopy Extended Distance User Guide
Miscellaneous troubleshooting on
1.PAIR ----- ------,----- ---- -
2.PAIR ----- ------,----- ---- -
Operations using CCI
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