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The following table describes operations that are required before disconnecting
external volumes.
Table 5-4
Operations Required before Disconnecting External Volumes
If External Volume is Used
in this way
I/Os to the external volume
from the open system host
are in progress.
The external volume is online
from the mainframe host.
The external volume includes
the LDEVs that are set as the
pair of the copy program
products*.
The external volume includes
the LDEVs that are registered
to a pool for Copy-on-Write
Snapshot as pool volumes.
The external volume includes
the LDEVs that are registered
to a pool for Dynamic
Provisioning as pool volumes.
The external volume includes
the LDEVs for which the
migration processing of
Volume Migration is in
progress.
*Note: The copy program products includes ShadowImage, ShadowImage for IBM z/OS, Universal
Replicator, Universal Replicator for IBM z/OS, TrueCopy, TrueCopy for IBM z/OS, and Copy-on-Write
Snapshot.
Performing Universal Volume Manager Operations
Hitachi Universal Storage Platform V/VM Universal Volume Manager User's Guide
This Operation is Required
Stop the host I/Os to the volume and un-mount from the host.
The host I/Os to the specified volume are forcibly stopped if you
disconnect an external volume when I/Os from the open system host
are in progress.
Stop the host I/Os to the volume and perform the Vary Offline
operation.
Delete the pairs.
However, you can disconnect external volumes without deleting pairs
when the ShadowImage pair status is PSUE or when the ShadowImage
for IBM z/OS pair status is Suspend.
Change the status of the Copy-on-Write Snapshot pair to PAIR.
Perform the following operations on all the Dynamic Provisioning
volumes (V-VOLs) that are associated with a pool to which the external
volume is registered.
Stop the use of the Dynamic Provisioning volumes.
Block the Dynamic Provisioning volumes by using the VLL function
for blocking volumes.
Delete the migration plans.
5-35
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