HP StorageWorks XP Remote Web Console Software - Manual (Page 131)

TrueCopy for z/OS user guide 131
NOTE: If you are migrating data between disk arrays using P/DAS, both disk arrays must be the same
type (XP128/XP1024/XP10000/XP12000 or other XP disk arrays). If you need to migrate data from
other vendors’ storage disk arrays onto the XP128/XP1024/XP10000/XP12000, contact your HP
account support representative.
To use TC390 Synchronous to migrate data from one volume to another:
1. Vary the R-VOL(s) offline from all attached hosts. The R-VOLs are the target volumes onto which you are
migrating the data. The M-VOLs (source volumes) can remain online.
2. Connect to the disk array containing the volume(s) to be migrated, and then start the TC390 software.
If not already done, install the remote copy connections and configure the ports (RCPs for serial,
initiator ports for fibre) (if migrating between disk arrays), and then add the RCUs.
3. On the TrueCopy main window, select the correct CU image and the appropriate volume(s), and then
start the TC390 Synchronous pair(s) using the Add Pair window (see ” Creating TrueCopy Volume Pairs
(Add Pair) ” on page 115).
4. Monitor the progress of the initial copy operation(s) and the status of the pair(s) on the Pair Status
window (see ” Viewing the Status of TrueCopy Volume Pairs (Pair Status) ” on page 112). Refresh the
window as needed. When the status has changed from pending duplex to duplex, the M-VOL and
R-VOL are identical and synchronized.
5. Use the IBM P/DAS host software function (see ” P/DAS Support ” on page 43) to redirect all
application I/Os to the R-VOL(s) nondisruptively. If the host system does not support P/DAS, use the
following procedure to stop using the M-VOL(s) and switch to the R-VOL(s):
a. Disable all applications using the M-VOL(s).
b. When all update activity to the M-VOL(s) has stopped, connect to the MCU, select the correct CU
image, and delete the TC390 volume pair(s) (see ” Deleting TrueCopy Volume Pairs (Delete Pair) ” on
page 126).
If the M-VOL(s) and R-VOL(s) are attached to the same host, vary the M-VOL(s) offline first, and then
vary the R-VOL(s) online. The M-VOL(s) and R-VOL(s) have the same VOLSERs and cannot be online
to the same host(s) at the same time.
c. If an R-VOL contains more cylinders than its M-VOL, update the R-VOL volume table of contents
(VTOC) using ICKDSF/REFORMAT.
d. If you want to keep the volumes synchronized, establish the same TC390 pair(s) in the reverse
direction using the No Copy initial copy option (see ” Creating TrueCopy Volume Pairs (Add Pair) ”
on page 115). If the original M-VOL(s) will be temporarily unavailable for update copy operations,
you can suspend the new pair(s) so that the new MCU keeps track of changes.
e. Start the applications with the R-VOL(s). When the original M-VOL(s) are available, you can resume
the pair(s) using the Resume Pair window (see ” Resuming TrueCopy Volume Pairs (Resume Pair) ” on
page 123).
Point-in-Time (PiT) Data Duplication Using TrueCopy Asynchronous
You can use TC390 to make Point-in-Time (PiT) duplicates of groups of volumes. The TC390A Group and
Drain suspend options can be used together to create a PiT copy, relative to an application, of an entire
TC390A consistency group of volumes.
To produce a PiT duplicate of an existing TC390A consistency group:
1. Disable the applications accessing the TC390A M-VOLs to stop all update activity to all M-VOLs in the
group.
2. After all M-VOL updates have completed, suspend the TC390A group using the Group and Drain
suspend options. If you are suspending the group at the main site, issue the suspend/group command
to one M-VOL in the MCU. If you are suspending the group at the remote site, issue the suspend/group
command to one R-VOL in the RCU.