Installation guide

96107 Fourth Edition 21
StorageTek Proprietary
AIX Host Installation/Upgrade Procedures
After a retry limit has been reached for finding a good path, the following error
message is generated.
Identifier:FDB66493 Label:DPF_UNRECOV Text:”THRESHOLD HAS BEEN
REACHED”
The pattern of errors repeats for each LUN until the problem is corrected.
All Paths Bad Condition with HACMP
Disconnect all the cables from controller A and B with active I/O to all LUNs.
After a few minutes the dpfutil listall command displays the
following.
# Device Active Standby
hdisk1 cbx4 (fscsi1 0,0) Fcbx0 (fscsi0 0,0)
hdisk2 cbx5 (fscsi1 0,1) Fcbx1 (fscsi0 0,1)
hdisk3 cbx6 (fscsi1 0,2) Fcbx2 (fscsi0 0,2)
hdisk4 cbx7 (fscsi1 0,3) Fcbx3 (fscsi0 0,3)
Note: The failover driver will always keep the active path as nonfailed as part
of the recovery process.
When the “all paths bad” condition has been detected for a LUN, the following
error messages are generated in the error log. You will get multiple instances
of the following message as the failover software attempts to find a good path.
Identifier:5960EC86 Label:DPF_FAILOVER Text:”MAIN PATH WRAPPED TO
BACK-UP PATH”
After a retry limit has been reached for finding a good path, the following error
message is generated.
Identifier:FDB66493 Label:DPF_UNRECOV Text:”THRESHOLD HAS BEEN
REACHED”
Mail is also sent to root with the following message.
“HACMP NOTICE: cbxdpf unrecoverable failure on disk x“
Then a halt -q is automatically performed to shut down the node if other
HACMP nodes are still up. This is done to force another HACMP node to bring
the resources online. If no other HACMP nodes are available, it will leave the
resources in an “all paths bad” condition, with continuing error messages for
each LUN, until the problem is rectified.