Types of failures – HP XP Racks User Manual
Page 729
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 with REVERSE
Transmission failure
on the line between
the storage systems.
SWAPPING
DUPLEX or
PENDING
Failure after
YKSUSPND
processing with
REVERSE
specified.
Failure
during a
failover
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 that of the
S-VOL.
processing with
REVERSE
specified.
copy direction
from being
reversed.
•
A limitation
exists with
another program
•
Execute
YKRESYNC
with
product with
which the
volume is shared
REVERSE DEVN
VOLUNIT
specified, for the
•
An old P-VOL is
online.
volume in the
SWAPPING status
•
Other
for the copy pair
for which the
copy direction
could not be
reversed.
Execute YKRESYNC
with REVERSE DEVN
A transmission
failure occurred
when the status was
SWAPPING
SUSPER
specified, for the
reversed for a copy volume in the
pair for which the
SWAPPING status for
copy direction
cannot be reversed.
the copy pair for
which the copy
direction could not
be reversed.
Recovering from a Failure 729