When using FCESTABL to establish FlashCopy® relationships, you can suspend write operations to S-VOLs. Suspending write operations to S-VOLS helps to keep data consistent.
|
Parameter |
Value |
Description |
|---|---|---|
|
ACTION |
FREEZE |
Suspend the write operations from the host to S-VOLs. If you establish a relationship specifying extents, the ACTION parameter suspends the write operation to the whole volume. |
The following example shows how to use the FCESTABL command with the ACTION parameter to suspend write operations on an S-VOL when you establish a FlashCopy® relationship.
FCESTABL SDEVN(X'4202') TDEVN(X'4203') ACTION(FREEZE)
In this example, the FCESTABL command establishes a relationship between volume (device) number 4202 and volume number 4203, and at the same time suspends write operations from the host to the source device, volume 4202.
To resume write operations to S-VOLs, you need to issue the FCWITHDR command with the ACTION parameter specified.
If a timeout occurs, write operations might be resumed even if you did not issue the FCWITHDR command. The default setting for the timeout is 120 seconds.
You can change the default value of the SCP time (120 seconds).
Commands used for this operation:
- - raidcom modify local_replica_opt command (for changing the SCP time)
- - raidcom get local_replica_opt command (for viewing the SCP time)