- Red Hat Enterprise Linux (RHEL) 5.10
- RHEL 5.10 system attached to HP P9500 Storage Array SAN is showing 1 of 4 LUN paths as faulty. All LUN's are showing the second path as failed.
2:0:1:0 sdae 65:224 0 [undef][faulty] HP,OPEN-V 2:0:1:1 sdaf 65:240 0 [undef][faulty] HP,OPEN-V 2:0:1:2 sdag 66:0 0 [undef][faulty] HP,OPEN-V 2:0:1:3 sdah 66:16 0 [undef][faulty] HP,OPEN-V 2:0:1:4 sdai 66:32 0 [undef][faulty] HP,OPEN-V 2:0:1:5 sdaj 66:48 0 [undef][faulty] HP,OPEN-V 2:0:1:6 sdak 66:64 0 [undef][faulty] HP,OPEN-V 2:0:1:7 sdal 66:80 0 [undef][faulty] HP,OPEN-V 2:0:1:8 sdam 66:96 0 [undef][faulty] HP,OPEN-V 2:0:1:9 sdan 66:112 0 [undef][faulty] HP,OPEN-V
- If a closed ELS event was received, that would explain the lack of connectivity. To reinitialize the exchange, a
LIPwould need to be issued for the faulty host. As an example, this can be performed by the following:
# echo 1 > /sys/class/fc_host/host2/issue_lip
The above should reinitialize the login exchange and bring the paths back once a successful
path_checker iteration completes.
- There is a FCP Target port in 'Not Present'
port_stateand it was determined that there was a configuration change on the port that cause the port to go down:
Class Device = "0-3" Class Device path = "/sys/class/fc_remote_ports/rport-2:0-3" dev_loss_tmo = "30" fast_io_fail_tmo = "off" maxframe_size = "4294967295 bytes" node_name = "0xffffffffffffffff" port_id = "0xffffffff" port_name = "0x50060e8016049100" port_state = "Not Present" roles = "unknown" scsi_target_id = "1"
If an FCP Target port does not respond within
dev_loss_tmo, the port is placed in 'Not Present' state and access to targets are blocked, the signature remains to persist the scsi target id binding in case the port is re-established. All IO, including the
multipathd path_checker are blocked.
Get the output of the following commands:
# systool -c fc_remote_ports -v # systool -c fc_host -v # for d in $(ls /sys/block |grep sd); do echo $d - `cat /sys/block/$d/device/state`; done
- Red Hat Enterprise Linux
- device mapper multipath
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