HP XP Racks User Manual
Page 20
NOTE:
If a BC pair is suspended due to a failure, the split time and the actual task start time
must be the same in order to restore Cnt Ac-J journal data that you created before the split
time to the Cnt Ac-J/BC volume after the split. The task start time is determined by the amount
of journal data in the journal volume at the time of the split.
For example, if the journal volume contains data that needs one hour to be restored, the
starting time of the split operation delays for an hour.
2.
The BC pair is split.
3.
Cnt Ac-J resumes the suspended R-JNL operations.
Requirements, restrictions, and guidelines for using consistency group pair-split with shared BC and
Cnt Ac-S or Cnt Ac-J volumes
You can share BC P-VOLs with Cnt Ac-S or Cnt Ac-J S-VOLs but there are requirements, restrictions,
and guidelines for using consistency group (CG) pair-split in these cases.
Requirements
If you are sharing BC P-VOLs with Cnt Ac-S or Cnt Ac-J S-VOLs, CG pair-split has the following
requirements:
•
All pair operations must be performed using RAID Manager.
•
You must share BC P-VOLs with the Cnt Ac-S or Cnt Ac-J S-VOLs.
•
The Cnt Ac-S or Cnt Ac-J S-VOLs that you are sharing with the BC CG pairs must have the
same status.
•
If you are sharing BC volumes with Cnt Ac-J volumes, the pair status must be the following:
(For Cnt Ac-J) “PAIR” or “PSUS”.
◦
◦
(For BC) “PAIR” or “COPY(PD)/COPY”.
•
If you are sharing BC volumes with Cnt Ac-S volumes, the pair status must be the following:
(For Cnt Ac-S) “PAIR” or “PSUS”.
◦
◦
(For BC) “PAIR” or “COPY(PD)/COPY”.
Restrictions
If you are sharing BC P-VOLs with Cnt Ac-S or Cnt Ac-J S-VOLs, CG pair-split has the following
restrictions:
•
You can perform one split operation per BC CG.
•
You can:
Split each Cnt Ac-J journal up to three times (equivalent to three BC CGs).
◦
◦
Quick Split or Steady Split the pairs.
For more information about the methods you can use to split pairs, see
20
Business Copy system requirements and planning