HP XP7 Provisioning for Mainframe Systems User Guide (H6F56-96008)

• You cannot expand both the TSE-VOL and the THP V-VOL in one operation. Expand the same
type volumes in a single operation.
• You cannot expand both the Compatible FlashCopy SE volume and Thin Provisioning Z volume
in one operation. In this case, you must expand volumes whose types are same.
CAUTION: When increasing THP V-VOL capacity, do not perform the following operations.
When you perform these operations, do not increase THP V-VOL capacity.
• Operations using Virtual LVI
• Operations using Cache Residency
• Creating THP V-VOLs
• Restoring pools
• Deleting THP V-VOLs
• Maintenance of your storage system
After increasing THP V-VOL capacity, refresh the display, and then confirm that the THP V-VOL is
increased. If the THP V-VOL capacity is not increased, wait a while, refresh the display again, and
confirm that the THP V-VOL is increased. If you perform an operation without making sure that the
THP V-VOL is increased, operations may fail.
If you place the THP V-VOL online with an operating system that does not support DVE (Dynamic
Volume Expansion), for instance operating systems whose versions are z/OS 1.9 and z/VM 5.4,
the THP V-VOL capacity cannot be increased. If you add capacity to the THP V-VOL, take the THP
V-VOL offline when the operating system that does not support DVE, and then increase the capacity
of the THP V-VOL. DVE is a function for increasing volume capacity while the volume is online to
a host system.
After the THP V-VOL capacity is increased, the host issues reserved I/Os to the THP V-VOL to update
the VTOC area. In this case, I/Os issued from other hosts to the THP V-VOL are waiting for the
reservation to be released. The reply from the THP V-VOL may be delayed, or the I/Os from other
hosts may time out. If the system operation may be inhibited by an interruption of a delayed reply
or a timeout, do not increase the capacity of the THP V-VOL.
58 Configuring thin provisioning