22. Click
Next
.
The
Create LDEVs
window appears. Go to
to create LDEVs.
If
Subscription Limit
of the created pool is set to 0%, the
Create LDEVs
window does not appear.
Click
Finish
and the
Confirm
window appears.
23. In the
Confirm
window, click
Apply
to register the setting in the task.
If you select a row and click
Detail
, the
Pool Properties
window appears.
If the
Go to tasks window for status
checkbox is selected, the
Tasks
window appears.
Working with THP V-VOLs
About THP V-VOLs
Thin Provisioning requires the use of THP V-VOLs, which are virtual volumes with no physical
memory space. In Thin Provisioning, multiple THP V-VOLs can be created.
A THP V-VOL is a volume in a thin provisioning storage system. It is the virtual volume from a THP
pool. Data in the THP pool is used via a THP V-VOL. A THP V-VOL is a virtual LU to some hosts.
On open systems, OPEN-V is the only supported emulation type on a THP V-VOL. You can define
multiple THP V-VOLs and assign them to a Thin Provisioning pool.
Relationship between a pool and THP V-VOLs
Before you can use Thin Provisioning, a THP V-VOL and a pool are required. Thin Provisioning
uses the pool volumes in a pool through the THP V-VOLs.
The following figure shows the relationship between a pool and THP V-VOLs.
Protecting THP V-VOLs
By using of the protecting function of THP V-VOL, when problems occur in the pool or pool-VOLs,
THP V-VOLs using the pool can be protected from read and write requests, and change the access
attribute of the THP V-VOL to the Protect attribute. The function to protect from reading and writing
of THP V-VOL when the pool usage reaches the full size is displayed in the window as
Protect
V-VOLs when I/O fails to Blocked Pool VOL
. The function to protect from reading and writing of
THP V-VOL when the pool-VOL is blocked is displayed in the window as
Protect V-VOLs when I/O
fails to Blocked Pool VOL
. For details about setting items, see
“Create Pools window” (page 314)
.
132
Configuring thin provisioning