HP XP7 User Manual page 21

The following table shows when you can perform a CG pair-split, based on the BC Z pairs in the
CG that are not paired (a status other than "DUPLEX"), and the resulting pair status after you
perform the pair-split.
The status of the pairs in the CG
that have a status other than
DUPLEX
PENDING
SP-Pend/TRANS
V-Split/SUSPVS
Split/SUSPOP
Resync/PENDING
Resync-R/REVRSY
Suspend/SUSPER
Notes:
1. If you share a Cnt Ac-J Z S-VOL and a BC Z P-VOL, the command may end normally after you perform a CG
pair-split. Ensure the status of the pairs within the CG have changed to "Split/SUSPOP" (use the pairdisplay
command).
2. Consistency is guaranteed only for BC Z pairs in "DUPLEX" or "PENDING" status.
The following are examples of when you can perform a CG pair-split based on status of the BC Z
pairs in the CG:
Example 1
The are six BC Z pairs in a CG. Two of the pairs are paired ("DUPLEX" status), two are in
"PENDING" status, and two are in "Split/SUSPOP" status. In this case, you can perform a
CG pair-split, and doing so changes the status of all of the pairs in the CG to "Split/SUSPOP".
However, the S-VOLs that were in Split/SUSPOP may not be consistent with the other volumes
in the CG.
Example 2
There are two BC Z pairs in a CG and one is paired ("DUPLEX" status) and the other is in the
process of being resynchronized ("Resync/PENDING" status). In this case, you cannot perform
a CG pair-split.
Example 3
The are six BC Z pairs in a CG. Two of the pairs are paired ("DUPLEX" status), two are in the
process of Quick Split ("V-Split/SUSPVS" status), and two are in "Suspend/SUSPER" status.
Can you perform a CG pair-split?
YES
2
YES
2
YES
2
YES
NO
The command ends abnormally and shows the
following information:
[EX_CMDRJE] An order to the
control/command device was
1
rejected
NO
The command ends abnormally and shows the
following information:
[EX_CMDRJE] An order to the
control/command device was
1
rejected
NO
The command ends abnormally and shows the
following information:
[EX_CMDRJE] An order to the
control/command device was rejected
Status after you perform a CG
pair-split
Split/SUSPOP
Split/SUSPOP
Split/SUSPOP
Split/SUSPOP
The pair statuses remain the same.
The pair statuses remain the same.
The pair statuses remain the same.
Splitting pairs using consistency groups 21