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SnapShot operations supported
Table C-3
performed on the shared volume when:
•
Snapshot is cascaded with a TCE P-VOL
•
Snapshot is cascaded with a TCE S-VOL
•
The TCE pair has the status shown in the tables.
(SS = SnapShot)
Table C-3: Supported SnapShot Operations when TCE/SS P-VOL Cascaded
SnapShot
Pair
Paired
Operation
Create
Yes
Split
Yes
Re-sync
Yes
Restore
No
Delete
Yes
•
Table C-4: Supported SnapShot Operations when TCE S-VOL/SS P-VOL
SnapShot
Pair
Paired
Operation
Create
Yes
Split
No
Re-sync
Yes
Restore
No
Delete
Yes
Status combinations, Read/write supported
The tables in this section present a matrix of TCE and SnapShot statuses.
Read/write for a shared volume is indicated, as well as whether the
combined statuses are allowed.
•
Table C-5
SnapShot P-VOL = a TrueCopy P-VOL.
•
Table C-6
SnapShot P-VOL = a TrueCopy S-VOL
Failure status in these tables does not include LU blockage and other access
problems.
C–4
Hitachi AMS 2000 Family TrueCopy Extended Distance User Guide
and
Table C-4
show the SnapShot operations that can be
Synchronizing
Yes
Yes
Yes
No
Yes
Cascaded
TrueCopy S-VOL Status
Synchro-
Split
nizing
RWR
mode mode
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
shows status and read/write allowed when the
shows status and read/write allowed when the
Cascading with SnapShot
TCE P-VOL Status
Split
Pool Full
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Inconsistent
Takeover
No
Yes
No
Yes
No
Yes
No
Yes
Yes
Yes
Failure
Yes
Yes
Yes
No
Yes
Busy
Pool
Full
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
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Troubleshooting
