Hewlett Packard Enterprise HPE XP7, User Manual, Page: 18 / 311

Item Fast Snap Business Copy
Initial copy operation
Not required.
Volumes can be copied faster.
Required.
Number of S-VOLs per P-VOL Up to 1,024 Up to 9
Capacity efficiency High. Only differential data is
copied from the P-VOL. Low. The entire P-VOL is copied.
Operation of copied volumes Always used with the P-VOL. Can be used separately from the
P-VOL.
P-VOL physical failures S-VOL data cannot be
guaranteed. P-VOL data can be restored
using the S-VOL.
S-VOL or pool physical failures If a physical failure occurs in a
pool*, data in all S-VOLs that use
the pool cannot be guaranteed. If a physical failure occurs in an
S-VOL, data in the S-VOL cannot
be guaranteed.
*When a pool is full (the depletion threshold is exceeded in a pool for which the capacity for Fast Snap
pairs is limited), data in all S-VOLs using the pool cannot be guaranteed.
The following figures explain the relation of data when a failure occurs in the P-VOL.
Fast Snap S-VOLs reference data in the P-VOL. Therefore, if a failure occurs in the P-VOL, data in all S-
VOLs under the P-VOL is lost.
18 Overview of Fast Snap