SI S-VOL
status
TC pair operations
Create Split Resync Delete
Switch operations
between the primary and
secondary sites
(horctakeover)
COPY(PD)/
COPY
COPY(SP)/
COPY
COPY(RS)/
COPY
No No No Yes No
PAIR No No No Yes No
PSUS(SP)/
PSUS
No No No Yes No
PSUS
PSUE
Yes Yes Yes Yes No
COPY(RS-R)/
RCPY
No No No Yes No
Status reporting and data currency
The following table shows the pair status that is reported for different
combinations of shared volumes.
Number of
TC pairs
Number of SI
S-VOLs
Pair status
0 0 SMPL
0 1 SI pair status
0 2 or more SI pair status for the S-VOL with lowest LUN
1 0 TC pair status
1 1 TC pair status
1 2 or more TC pair status
• TC pair status is reported to the host if you query the TC P-VOL or S-VOL.
To obtain the SI pair status, query the SI P-VOL pair.
• SI supports multiple S-VOLs for each of its P-VOLs, but when you issue a
pair status query, the status is returned only for the pair whose S-VOL
has the lowest LUN. To check pair status for the other S-VOLs, direct a
host query to the specific S-VOL using the S-VOL's LUN in the host
command.
Device Manager - Storage Navigator displays the status of all S-VOLs.
The following table shows when data is current on a shared TC/SI volume
based on the pair statuses.
Sharing TrueCopy volumes
4-11
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
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