HP XP P9500 Storage - Manual (Page 73)

Requirements for increasing THP V-VOL capacity
You can increase THP V-VOL capacity up to 59.9 TB. To notify the host that the THP V-VOL capacity
has been increased, make sure host mode option 40 is enabled. Processing differs as follows,
depending on the value of host mode option 40:
•
When host mode option 40 is not enabled, the host will not be notified that the THP V-VOL
capacity has been increased. Therefore, the THP V-VOL data has to be read again by your
storage system after the capacity is increased.
•
When host mode option 40 is enabled, the host is notified that the THP V-VOL capacity has
increased. If the operating system cannot recognize the value of capacity that was increased,
the THP V-VOL data has to be read again by your storage system.
The following requirements are important when increasing the THP V-VOL capacity:
•
The THP V-VOL to be increased is not shared with a P9500 product that does not allow
increasing the THP V-VOL (See
“Using Thin Provisioning or Smart Tiers with other P9500
products” (page 75) ).
•
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, click Refresh in Remote Web Console, and then confirm that
the THP V-VOL is increased. If the THP V-VOL capacity is not increased, wait a while, click Refresh
again, and confirm that the THP V-VOL is increased. If you perform a Remote Web Console
operation without making sure that the THP V-VOL is increased, operations from Remote Web
Console may fail.
If either of the following operations is being performed, the THP V-VOL capacity might not be
increased:
•
Auto LUN
•
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.
Thin provisioning requirements 73