FlashCopy revertible — Select advanced options

Introduction

You can select more advanced copy options from this page when you restart an existing, persistent FlashCopy relationship. You must have previously created a persistent FlashCopy relationship without the change recording feature enabled on a volume B to volume C FlashCopy pair in a Global Mirror configuration.

Menu path

Fields

Inhibit writes to source volume

Prevents writes to the source volume of a FlashCopy relationship, which is also the target volume of an existing Global Copy relationship at a remote site.

Selecting this option protects a target volume that is part of an existing FlashCopy relationship from updates from the host system that is attached to a storage unit at a remote site. This option is disabled by default.

Inhibit writes to target volume

Prevents writes to the target volume of a FlashCopy pair as long as the FlashCopy relationship exists. That is, any write operations to the target volume of the volume pair fail as long as that relationship still exists. Selecting this option protects the target volume from any updates from the host system and ensures that writes are prohibited on the target volume until a refresh target volume operation is complete.

Note: If you select the Inhibit writes to target volume option, the change recording feature is not effective on the target volume. This option is disabled by default.

Allow target to be restored to pre-FlashCopy state

Saves data on the target volume to memory for disaster recovery purposes before a FlashCopy operation occurs. This option is disabled by default.

Displays the sequence number that is defined for a FlashCopy relationship. The FlashCopy sequence number corresponds to a particular relationship that is being created.

Note: If the FlashCopy sequence number that you specify matches the sequence number of a current relationship or if a sequence number is not specified, the selected operation is performed. If you specify a FlashCopy sequence number that does not match, the selected operation is not performed.

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