Types of failures – HP XP P9500 Storage User Manual
Page 735
Types of Failures
The types of Cnt Ac-J Z failure are as follows:
•
Failure during a failover
•
PSOFF or severed power
#
•
Others
Lack of copy pairs
◦
◦
Inter-disk controller communication failure/full journal
◦
Internal storage system failure
◦
Line failure
#
PSOFF refers to when a storage system is turned off, whereas severed power refers to when the
supply of electricity to the storage system is cut off, such as during a power outage.
Recovering from Failures during Failovers and PSOFF/Cut Power
lists the procedures for recovering from failures for each failure type.
Table 131 Procedures for Recovering from Each Failure Type
Recovery
Procedures
Cause of Failure
Copy Pair Status after a Failure
Failure Type
S-VOL
P-VOL
Specific
General
Execute
YKRESYNC
twice
Transmission
failure on the line
between the
storage systems.
SWAPPING
DUPLEX or
PENDING
Failure after
YKSUSPND
processing with
REVERSE
specified.
Failure during a
failover
with REVERSE
DEVN
specified
(the first time an
error will occur,
but normal
termination is
performed the
second time).
SWAPPING
SUSPER
Failure after
YKRESYNC
•
Remove the
problem
preventing the
•
The size of the
P-VOL is
greater than
processing with
copy direction
that of the
S-VOL.
REVERSE
specified.
from being
reversed.
•
A limitation
exists with
•
Execute
YKRESYNC
with
another
program
REVERSE
product with
DEVN
which the
VOLUNIT
volume is
shared
specified, for
the volume in
the SWAPPING
•
An old P-VOL is
online.
status for the
copy pair for
•
Other
which the copy
direction could
not be
reversed.
Execute
YKRESYNC
with
A transmission
failure occurred
when the status
SWAPPING
SUSPER
REVERSE DEVN
was reversed for a specified, for the
copy pair for
volume in the
Recovering from a Failure 735