HP XP7 Storage - Manual (Page 101)

Related topics
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“View Pair Properties window” (page 169)
Monitoring synchronous rates
You can check the percentage of data that is synchronized between the P-VOL and S-VOLs. FS’s
synchronous rate shows the rate that S-VOL data matches that of the next new generation of the
S-VOL. If the S-VOL is the latest one, the synchronous rate is computed by comparing the S-VOL
with the P-VOL.
The synchronous rate is a rough value, and can have a large margin of error. If the P-VOL is written
to in the configuration of multiple generation (the configuration between the P-VOL and S-VOLs is
1:N), the synchronous rates for only the S-VOL of the newest generation decrease. And if the S-VOL
is written to, only the synchronous rates of written generation decrease.
The following figure shows how to monitor the synchronous rates.
CAUTION: During the FS pair restoration process, the pair synchronous rate may not be up to
date. The task must complete for the rate to be up to date.
For more information about restoring FS pairs, see “Restoring Fast Snap pairs” (page 79) .
Monitoring pair information 101