Hewlett Packard Enterprise HPE XP7, User Manual, Page: 44 / 311

• Pairs 1 and 2 are Continuous Access Journal pairs.
• Pair 3 is a Continuous Access Journal pair for delta resync.
• Pairs 4, 5, and 6 are Fast Snap pairs.
You must create pairs 1 and 2 before creating pairs 5 and 6, but pair 4 can be created at any time.
Sharing Fast Snap volumes with High Availability
The following tables list the relationship between Fast Snap tasks and HA pair status.
NOTE: If you share HA volumes with Fast Snap volumes, stop I/O to a volume before storing snapshot
data. Snapshot consistency cannot be guaranteed if you store snapshot data without stopping I/O to the
volume.
For more information about HA, see the HPE XP7 High Availability User Guide .
The following table lists the Fast Snap tasks you can perform when the P-VOL is shared with an HA P-
VOL.
HA status I/O
mode FS task
Create
pair Store
snapshot
data Restore
pair Delete
snapshot
data Delete pair
COPY Mirror
(RL) Yes Yes No Yes Yes
PAIR Mirror
(RL) Yes Yes No Yes Yes
PSUS Local Yes Yes Yes Yes Yes
Block Yes Yes No Yes Yes
PSUE Local Yes Yes Yes Yes Yes
Block Yes Yes No Yes Yes
The following table lists the Fast Snap tasks you can perform when the P-VOL is shared with an HA S-
VOL.
HA status I/O
mode FS task
Create
pair Store
snapshot
data Restore
pair Delete
snapshot
data Delete pair
COPY Block No No No No Yes
PAIR Mirror
(RL) Yes Yes No Yes Yes
Table Continued
44 Sharing Fast Snap volumes with High Availability