Complete this task to determine when all fast reverse restore operations
are complete and when no more FlashCopy relationships exist between the B
volumes and the C volumes. This is the seventh step in the Global Mirror disaster
recovery process.
The fast reverse restore operations complete the data transfer
from the C volumes to the B volumes. However, before you can proceed with
any additional steps, the back ground copy must complete. When the background
copy is completed, FlashCopy relationships no longer exist between the B volumes
and C volumes. Also, the C volume is no longer usable. Both of these operations
must complete before you can move on in the disaster recovery process.
The
best way to determine if these operations are complete is to periodically
issue the lsflash command against the B volumes to query the existence
of FlashCopy relationships.
Perform the following steps to determine
that no FlashCopy relationships exist between the B volumes and the C volumes.
The example command in this task is shown in two formats. The first format
shows the type of information that the command requires. The second format
provides the command with declared values for the variables.
- Issue the lsflash command to check the existence
of FlashCopy relationships between the B volume and the C volume. Enter the lsflash command
at the dscli command line prompt with the following parameters and variables:
dscli>lsflash -dev storage_image_ID -s target_volume_ID
Example
dscli>lsflash -dev IBM.1750-68FA150 -s 0200
Notes: - The storage_image_ID is the manufacture, storage unit type, and
serial number value of the remote storage unit that has become the primary
unit because of the disaster.
- The -s parameter limits the report information that is returned
only to the FlashCopy pair relationships that still exist.
- By designating only the target volume ID, you are further limiting the
report to display just the target side of the FlashCopy pair relationship.
When the report returns a blank screen, it indicates that background copy
has completed and that no FlashCopy relationships exist between the B volume
and the C volume.
- Repeat Step one periodically until no FlashCopy relationships exist
between the B volume and the C volume.
After the fast reverse restore and the background copy operations
have completed, you can proceed to the next task which is reestablishing the
FlashCopy relationship between the B volume and the C volume.