Complete this task series to query for the first pass of
the out-of-sync bitmap completion, to quiesce your system, and to
complete the query process to ensure that the out-of-sync tracks equal
0. This series of tasks is the third step in the failback recovery
process that allows production to be returned to your A site.
Before you begin
To complete this series of tasks, you must ensure that you
have resynchronized the volumes, B volumes to A volumes.
About this task
This series of tasks requires the use of the lspprc command and that you quiesce your system.
Complete the following steps to complete the third step of the failback
recovery process. The example commands in this task are 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.
Note: You can enter the commands that are described in the steps.
Procedure
- Issue the lspprc command periodically
to identify when the first pass of the out-of-sync (OOS) bitmap completes.
Depending on the number of transactions that you have, some time elapses.
Enter the lspprc command at the dscli command prompt
with the following parameters and variables:
dscli>
lspprc -dev storage_image_ID -remotedev storage_image_ID -l SourceVolumeID:TargetVolumeID
Example
dscli> lspprc -dev IBM.2107-75FA150 -remotedev
IBM.2107-75FA120
1000:1000
Notes:
- The -dev parameter specifies the ID of your source storage system. Your
source is the Site B storage system.
- The -remotedev parameter specifies the ID of the target storage system. The
remote storage system is your Site A storage system.
- The source_volume_ID:target_volume_ID value has
the Site B volume ID as the source and the Site A volume ID as the
target.
- Quiesce your I/O and unmount your file systems at the B
site to preserve the integrity of your file system.
Note: Unmounting your file systems flushes the host cache and ensures
that you actually copy valid data sets.
- Reissue the lspprc command periodically to identify when
the remaining bits completely drain from the B site. This is indicated
when the out-of-sync (OOS) tracks equal zero. Depending on the number
of transactions that you have, some time elapses. Enter the lspprc command at the dscli command prompt with the following parameters
and variables:
dscli> lspprc -dev storage_image_ID -remotedev storage_image_ID -l SourceVolumeID:TargetVolumeID
Example
dscli> lspprc -dev IBM.2107-75FA150 -remotedev
IBM.2107-75FA120
1000:1000
What to do next
After this task is completed, you are ready to establish
the remote mirror and copy paths from Site A to Site B.