Hitachi G200 - Pair Status Definitions

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When a pair is suspended due to an error condition, the primary/
secondary system changes the P-VOL and S-VOL status to PSUE.
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When a pair is deleted from the primary system, that system changes
the status of the P-VOL and S-VOL to unpaired.
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When a pair is deleted from the secondary system, that system
changes the S-VOL status to unpaired, and the secondary system
detects the pair release and changes the P-VOL status to PSUS.
Pair status definitions
Both Device Manager - Storage Navigator and CCI pair status names appear
in the Status column, except when the names are the same. When they are
the same, the CCI status does not appear.
The following table shows both types of status names and their descriptions.
In some cases, a particular status has no exact parallel status in the other
interface. This is noted.
When checking your pairs' status, click Refresh to make sure the data is
current. The P-VOL access and S-VOL access columns in the following table
indicate whether the volumes accept read/write.
HDvM - SN
status
CCI status Description
P-VOL
access
S-VOL
access
Unpaired in
HDvM - SN
SMPL This volume is not currently assigned to a
TrueCopy pair.
Read/Write Read/Write
COPY
1
COPY The initial copy operation for this pair is in
progress. This pair is not yet synchronized.
Read/Write Read Only
PAIR
PAIR • The pair is synchronized
• Updates from the host to the P-VOL are
duplicated in the S-VOL.
Read/Write Read Only
PSUS
(See also
Split types
on page
7-5.)
SSUS, PSUS • The pair was split by a user or deleted
from the secondary system. The pair is
not synchronized.
• When you split the pair from the primary
system, that system changes the status
of the P-VOL and S-VOL to PSUS.
• In PSUS status, updates to the S-VOL
stop. The storage system keeps track of
updates to the P-VOL in order to update
the S-VOL when the pair is
resynchronized.
CCI also shows P-VOL status as PSUS.
• When you split the pair from the
secondary system, that system changes
the status of the S-VOL to PSUS. The
primary system detects this and changes
P-VOL status to PSUS.
CCI shows the S-VOL status as SSUS.
Read/Write Read only if
S-VOL write
option is
disabled.
Read/Write
if S-VOL
write option
is enabled.
7-4
Monitoring and maintaining the TC system
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models