HP XP P9500 Storage - Manual (Page 78)

Requirements Items
Volume capacity from 46.87 MB to 59.9 TB per volume. Volume capacity
• TB: 0.01 to 59.99
•
GB: 0.04 to 61,439.99
• MB: 46.87 to 62,914,556.25
•
Blocks: 96,000 to 128,849,011,200
However, if you use the volume as a P-VOL or S-VOL of Business Copy, Auto LUN V2, Continuous
Access Synchronous, Continuous Access Journal, or External Storage Access Manager, the
volume capacity must be 4 TB or less.
Total maximum volume capacity of 5.0 PB per storage system.
Available. Path definition
Available (Quick Format is not available.) LDEV format
System Option Mode 867 OFF
When you format an LDEV on the THP V-VOLs, the storage system initializes data only in the
consumed pool pages of the THP V-VOLs. However, after you format an LDEV, the free space
in the pool does not increase because the pages are not released.
NOTE: System Option Mode 867 ON: When you format an LDEV on a THP V-VOL, the capacity
mapped to the THP V-VOL is released to the pool as free space.
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
“Increasing THP V-VOL capacity” (page 158) ).
•
The THP V-VOL is not undergoing LDEV formatting.
78 Configuring thin provisioning