Hitachi TAGMASTORE MK-90RD011-25 User Manual
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Hitachi Command Control Interface (CCI) User and Reference Guide
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Primary
volume
S
Secondary
volume
S
Read/Write
Copy on write
Read/Write
Restore copy
Table 2.8
SnapShot Pairing Status
Status Pairing
Status
Primary
Secondary
SMPL
Unpaired (SnapShot) volume
R/W enabled
R/W disable (Note 1)
PAIR (PFUL)
The snapshot available state allocated the resource.
R/W enabled
R/W disable
COPY
The preparing state allocates the resource for the snapshot.
R/W enabled
R/W disable
RCPY
The copying state from snapshot to the primary volume by
using restore option.
R/W disable
R/W disable
PSUS (PFUS)
The differences of the updated data of the primary and
secondary volume are controlled with copying on write.
R/W enabled
R/W enabled
PSUE (Error)
“PSUS” status owing to an internal failure. The differences of
the updated data for the snapshot volume are not controlled.
R/W enabled
(Note 2)
R/W disable
Note 1: V-VOL unmapped to the SVOL of SnapShot will reply to SCSI Inquiry, but Reading
and/or Writing will not be allowed.
Note 2: Reading and writing are enabled, as long as no failure occurs in the primary volume.