HP XP Racks - Manual (Page 65)

The following requirements are important when increasing the THP V-VOL capacity:
•
The THP V-VOL to be increased is not shared with a HP XP7 Storage product that does not
allow increasing the THP V-VOL (See
“Increasing THP V-VOL capacity” (page 151) ).
•
The THP V-VOL is not undergoing LDEV formatting.
•
The capacity to be added to the THP V-VOL must be specified within the range indicated
below LDEV Capacity in the Expand V-VOLs window.
•
You cannot add capacity to the THP V-VOL while the pool related to the target THP V-VOL is
in any one of the following statuses:
◦ Exceeding the subscription limit threshold
◦ In progress of pool capacity shrinking
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 LUN
•
Operations using Cache Residency
•
Creating THP V-VOLs
•
Restoring pools
•
Deleting THP V-VOLs
•
Operations to increase the THP V-VOL capacity in another instance of RAID Manager
•
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 either of the following operations is being performed, the THP V-VOL capacity might not be
increased:
•
Auto LUN
•
Configuration change of journal used by Continuous Access Journal
•
Quick Restore by Business Copy
Operating system and file system capacity
Operating systems and file systems when initializing a P-VOL will consume some Thin Provisioning
pool space. Some combinations will initially take up little pool space, while other combinations
will take as much pool space as the virtual capacity of the THP V-VOL.
The following table shows the effects of some combinations of operating system and file system
capacity. For more information, contact your HP representative.
Pool Capacity Consumed Metadata Writing File System OS
O Writes metadata to first block. NTFS Windows Server
2003 and Windows
Server 2008*
Small (one page)
If file update is repeated, allocated
capacity increases when files are
updated (overwritten). Therefore, the
Thin provisioning requirements 65