HP XP7 Storage - Manual (Page 141)

Changing the name of a THP V-VOL
The Storage Administrator (Provisioning) role is required to perform this task.
1.
In the Remote Web Console main window, in the Storage Systems tree, select Logical Devices.
The following is another way to select LDEVs.
1. In the Remote Web Console main window, in the Storage Systems tree, select Pool.
The pool name appears below Pool.
2. Select the pool associated with the THP V-VOL you want to rename.
3. Select the Virtual Volumes tab.
2. From the table, select the THP V-VOL you want to rename.
3. Click Edit LDEVs.
When you selected THP V-VOLs from the Virtual Volumes table, click More Actions, and then
Edit LDEVs.
The Edit LDEVs window opens.
4. Check LDEV Name and change the LDEV name, if necessary.
1. In Prefix, type the characters that will become the fixed characters for the beginning of
the LDEV name. The characters are case-sensitive.
2. In Initial Number, type the initial number that will follow the prefix name.
5. Click Finish.
6. In the Confirm window, confirm the settings, in Task Name type a unique name for this task
or accept the default, and then click Apply.
If Go to tasks window for status is checked, the Tasks window opens.
About releasing pages in a THP V-VOL
You can reclaim zero pages and release the appropriate pages if the status of all data in the pages
in the V-VOL reads no logical records (referred to as zero page). The free capacity of a pool
increases after the pages are released. You can perform the operation to reclaim zero pages on
each V-VOL and monitor progress. For details, see
“View Pool Management Status window”
(page 319) . If you stop the operation to reclaim zero pages, the zero pages that have been reclaimed
cannot be restored.
Logically, there is no difference between a page with just zero data and the area of a THP V-VOL
without a page allotted. Both are effectively identical. However, the former uses pool capacity and
the latter does not.
Zero pages can be reclaimed when all the following conditions are satisfied:
•
The THP V-VOL is not used in conjunction with another HP XP7 Storage product which does
not support reclaiming zero pages.
See “Using Thin Provisioning Z or Smart Tiers Z with other HP XP7 Storage products” (page 59) .
•
LDEV formatting is not being performed on the THP V-VOL.
•
The THP V-VOL is not blocked.
•
The THP V-VOL is associated with a pool.
•
The pool associated with the THP V-VOL is not blocked, or is full and blocked.
•
The THP V-VOL is not TSE-VOL.
Pages that include control cylinders are not processed when releasing pages in a THP V-VOL.
While releasing pages from a THP V-VOL, performance of the host I/O to the THP V-VOL may
temporarily decrease due to scanning for non-zero data.
Managing pools and THP V-VOLs 141