Additional information on pair status, Cnt ac-j psus types and behaviors – HP XP7 Storage User Manual
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Additional information on pair status
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When a pair is split by the user or suspended by the system, the primary system notifies the
host(s) with a service information message (SIM). If SNMP is installed and operational for
XP7, this SIM results in an SNMP trap indicating the reason for suspension.
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Transitional states occur when a request is accepted to change pair status to PSUS, PSUE, or
to delete the pair, but is not yet complete. Transition states are not reported to the host.
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The user or the primary or secondary systems can initiate the PSUS/PSUE status change.
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Only the user can delete a pair.
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When you perform an operation, the system reports final status at the end of the operation.
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If an error causes the status to change to PSUE, the status is reported at the beginning of the
transition.
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A pair in Flush mode (remaining local update data is flushing to the secondary system) remains
in Suspending or Deleting status until data in the master and restore journals is the same and
the pair is completely split or released. To calculate the time during which the pair remains
in Suspending or Deleting status, use the following equation:
C x (u / 100) x 1,024 / V (The unit is seconds)
where:
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C is total capacity (MB) of the master journal volume.
◦
u is the usage rate of data (%) in the master journal volume.
◦
V is data transfer speed (MB/sec) between the primary and the secondary systems.
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When pair status is COPY, neither cache nor shared memory can be added to or removed
from the system. When either tasks is to be performed, split any pairs in COPY, status, then
resynchronize when the cache or shared memory operation is completed.
Cnt Ac-J PSUS types and behaviors
The PSUS status can be set by the user or the system, from the primary or secondary systems.
Description
Volume PSUS type applies
to
PSUS type
The user split the pair from the primary or secondary system,
using the S-VOL-writeoption.
P-VOL, S-VOL
PSUS, S-VOL by Operator
Monitoring pair activity, status, license capacity
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