Pair Status Relationship To Copy-On-Write Snapshot Commands - Hitachi VSP F1500 User And Reference Manual

P-VOL
Status
PSUE
(Error)
Notes:
1 V-VOL unmapped to the S-VOL of a Copy-on-Write Snapshot will reply to a SCSI
.
Inquiry, but Reading and/or Writing is not allowed.
2 Reading and writing are enabled, as long as no failure occurs in the primary volume.
.

Pair status relationship to Copy-on-Write Snapshot commands

Table 6-11 Pair status relationship to Copy-on-Write Snapshot commands on
page 6-36
a pair status can be prior to any CCI command execution, 2) what the result
will be after giving a CCI command, and 3) what the pair status can be if the
CCI command is Accepted.
Table 6-11 Pair status relationship to Copy-on-Write Snapshot commands
-
Pair Status No -split
1 SMPL Accepted 2
2 COPY Acceptable
RCPY
3 PAIR Acceptable
4 PSUS Rejected
(PFUS)
5 PSUE Rejected
*A command is accepted and issued. Whether this command is executed or not depends on the
microcode version of the RAID storage system.
Note:
• pairsplit -S of a Copy-on-Write Snapshot volume is returned without
verification of the state transition that waits until SMPL state. In a SMPL
state, note that the volume that was an S-VOL becomes R/W
disabled and data is discarded.
• In the "PSUE" state, Copy-on-Write Snapshot does not manage
differential data between the primary volume and secondary volume.
6-36
Pairing Status
"PSUS" status due to an internal failure. The
differences of the updated data for the Copy-
on-Write Snapshot volume are not controlled.
applies to a Copy-on-Write Snapshot context. It explains 1) what
Copy-on-Write Snapshot Command
paircreate
-split
Rejected Rejected
Rejected Rejected
Accepted*4 Rejected
Acceptable Rejected
Rejected Rejected
Data replication operations with CCI
Command Control Interface User and Reference Guide
pairsplit
-E option -C option
Rejected
Accepted*
Accepted*
Accepted*
Rejected
Primary Secondary
R/W disable
2
R/W enabled
pairresync
-S option Resync
Acceptable Rejected
Accepted 1 Acceptable
Accepted 1 Acceptable
Accepted 1 Accepted*2
Accepted 1 Accepted*2