Status Reporting And Data Currency - Hitachi G200 User Manual

SI S-VOL
status
COPY(PD)/
COPY
COPY(SP)/
COPY
COPY(RS)/
COPY
PAIR
PSUS(SP)/
PSUS
PSUS
PSUE
COPY(RS-R)/
RCPY

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
0
0
0
1
1
1
• 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.
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
Create Split
No No
No No
No No
Yes Yes
No No
Number of SI
S-VOLs
0 SMPL
1 SI pair status
2 or more SI pair status for the S-VOL with lowest LUN
0 TC pair status
1 TC pair status
2 or more TC pair status
Sharing TrueCopy volumes
TC pair operations
between the primary and
Resync Delete
No Yes No
No Yes No
No Yes No
Yes Yes No
No Yes No
Pair status
Switch operations
secondary sites
(horctakeover)
4-11