HP XP7 Continuous Access Synchronous for Mainframe Systems User Guide (TK911-96003)

S-VOL accessP-VOL accessDescriptionBCM statusRWC status

When pair status is Pending, neither cache nor shared memory can be added to or removed from the storage system. When

either of these tasks is to be performed, first split any pairs in Pending, status, then resynchronize when the cache or shared

memory operation is completed.

RAID Manager pair status names

RAID Manager pair status names are different than Remote Web Console status names. The

following shows the corresponding names.

RAID Manager pair status nameRemote Web Console pair status name

SMPLUnpaired

COPYPending

PAIRDuplex

PSUSSuspended (by operation)

PSUESuspended (by error)

Split types

This topic discusses pairs that are split by user operation (Suspended-delete pair to RCU), and

pairs that are suspended by the system because of failure (Suspended).

• You can split a pair when the initial copy operation is complete.

You must split a pair to perform ICKDSF maintenance on the P-VOL or to access the S-VOL

(read-only mode). Continuous Access Synchronous Z pairs are also split when the CGROUP

FREEZE/RUN command is processed.

◦

◦ When you split a pair, the primary system ensures synchronization by completing any

pending update copy operation according to the user specified drain/purge suspend

optionbefore changing the status to Suspended.

• Pairs are split by the primary system only, for any of the following reasons:

You released the pair from the secondary system.◦

◦ An error condition related to the secondary system, the S-VOL, or an update-copy

operation.

◦ When the secondary system cannot run DFW (DASD fast write) to the S-VOL (when the

PPRC DFW-to-S-VOL-Required option is specified).

◦ The primary system cannot communicate with the secondary system.

Split types appear in the Status field on the View Pair Properties window. The following table

describes the split types. (RAID Manager does not display split types.)

DescriptionVolume

applies to

Split type

PPRCBCMRWC

The user specified that the pair should be split. This

was done during the pair split operation from the

P-VOLSUSPEND(03)SUSPOP(03)Primary Volume

by Operator

primary system by selecting Disable for the Primary

78 Monitoring and maintaining the Cnt Ac-S Z system