Creating fast snap pairs, Prerequisites – HP XP7 Storage User Manual
Page 64
Creating Fast Snap pairs
You can create an FS pair and define the pair in a consistency group. You can create a maximum
of 1,024 FS pairs at the same time. To create more than 1,024 FS pairs, repeat this task.
You specify the pool to be used for the FS pair when you create the pair. An FS pair consists of a
P-VOL and up to 1,024 S-VOLs. The S-VOLs are assigned in the order of 1 to 1,024.
The P-VOL and S-VOLs you select must be the same size. If you select a P-VOL that you are already
using as the P-VOL for another FS pair, you must specify the same pool for both pairs. For example,
if you specify three S-VOLs for one P-VOL, specify the same pool for the three FS pairs.
CAUTION:
To prevent the FS pair from being suspended (“PSUE” status), do not create FS pairs
while you are shutting down the storage system.
NOTE:
After creating an FS pair, the number of pairs shown in the summary section in the Local
Replication window and the number of pairs shown in the list in the FS Pairs tab can be different.
Wait until the configuration information has completed processing. If the numbers of pairs do not
match, reload the configuration information (see
“Reloading configuration information” (page 62)
).
Prerequisites
•
You have the Storage Administrator (Local Copy) role.
•
A V-VOL exists.
For more information about creating V-VOLs, see
•
The FS pair is not in the process of being deleted (“SMPL(PD)” status).
•
The volumes you want to use in the FS pair are not paired (“PAIR” status).
•
There is enough snapshot estimated manageable capacity. If necessary, check the snapshot
estimated manageable capacity (see
“Viewing local replication summary information”
•
You have not exceeded the pool threshold (“PFUL” status).
•
If you are sharing BC volumes with FS volumes, the BC pair exists.
•
To use an BC volume as an FS P-VOL when an available MU number does not exist, you have
completed the following:
1.
Deleted the FS pairs of MU numbers 0 to 2.
2.
Created the BC pair.
3.
Recreated the FS pair with an MU number of 3 or greater assigned.
64
Managing Fast Snap Pairs