HP XP P9500 Storage - Manual (Page 25)

Use the following formula to calculate the number of cache management devices that a THP V-VOL
requires. In this formula, the user-specified capacity is the user area capacity of a V-VOL.
ceil(user-specified capacity ÷ max-capacity-of-cache-management-device)
The calculated value must be rounded up to the nearest whole number.
Calculating the number of cache management devices required by a volume that is
not a THP V-VOL
One volume that is not a THP V-VOL requires one cache management device.
Viewing the number of cache management devices
Click Actions and select View Management Resource Usage to display the number of cache
management devices in the View Management Resource Usage window. For details, see
“About
cache management devices” (page 24) and “View Management Resource Usage window”
(page 290) .
About cache management devices 25