HP XP7 Storage - Manual (Page 45)

In such a case, resynchronize the consistency group and then run the split command again.
Host access after split
You can specify settings for read/write access to the P-VOL/P-VOL and S-VOL/S-VOL in consistency
groups after pairs are split. These settings are specified using RAID Manager or Business Continuity
Manager.
•
The RAID Manager settings for Cnt Ac-S are optional.
•
The Business Continuity Manager settings for Cnt Ac-S Z are required.
The following tables show the effects of the settings on read and write access.
Cnt Ac-S Z P-VOL Cnt Ac-S P-VOL Setting Interface
Write Read Write Read
N Y N Y Write access prohibited RAID Manager
*
Y Y Y Y No option selected
N Y N Y Write access prohibited Business Continuity
Manager
Y Y Y Y Write access permitted
* The effect on read/write shown in this table applies to the Cnt Ac-S P-VOL. When RAID Manager is used with a
Cnt Ac-S Z P-VOL, the effect is the same as "No option selected".
Cnt Ac-S Z S-VOL Cnt Ac-S S-VOL Setting Interface
Write Read Write Read
N N N Y Read access permitted RAID Manager
*
Y Y Y Y Read/Write access permitted
N N N Y No option selected
N N N Y Write access prohibited Business Continuity
Manager
Y Y Y Y Write access permitted
* The effect on read/write shown in this table applies to the Cnt Ac-S S-VOL. When RAID Manager is used with a Cnt
Ac-S Z S-VOL, the effect is the same as "No option selected".
Pair status before and after a split operation
Pairs in the same consistency group must be in PAIR/Duplex status when you begin the split
operation in order to maintain consistency. Otherwise, when the operation completes, pair status
will be inconsistent.
This is shown in the following table, in which font angle indicates the following:
•
Italics font: Pair status before the split operation on the consistency group
•
Regular font: Status after the split operation
Cnt Ac-S Z pairs Pair statuses
All = Suspend Some = Duplex, some = Suspend All = Duplex
Cnt Ac-S: PSUS Cnt Ac-S: PSUS Cnt Ac-S: PSUS All = PAIR Cnt
Ac-S
pairs
Cnt Ac-S Z: Suspend Cnt Ac-S Z: Suspend Cnt Ac-S Z: Suspend
Cnt Ac-S: PSUS Cnt Ac-S: PSUS Cnt Ac-S: PSUS Some = PAIR, some
= PSUS
Consistency group planning 45