Sun StorEdge SE3510FC: Path sometimes fails to recover when fibre cable is unplugged/plugged
Last updated on JUNE 03, 2015
Applies to:Sun Storage 3510 FC Array - Version Not Applicable and later
Sun Storage SAN Foundation Software - Version 4.0 and later
Unplug and plug fibre cable on host port directly attached to a Sun StorEdge SE3510FC: the port sometimes remains "NOT CONNECTED".
The path remains unusable, as if the cable has not been plugged in. Consequently, multipathing software, such as STMS or VxDMP, would not be able to re-enable the corresponding affected path.
The problem does not occur consistently. Lab reproduction shows that most of the time the path resumes operation as expected, but upon multiple attempts of unplug/plug, sometimes the path does not resume.
This problem has been observed with:
- StorEdge SE3510FC dual pathed, direct attached, loop mode, with firmware 3.27R
- SAN Foundation version from 4.4 through 4.4.4
- Sun Qlogic HBA and drivers
Upon replugging the fibre cable, the FC port was shown to be ONLINE by qlc driver as logged in /var/adm/messages, but "luxadm -e port" would show the port to be "NOT CONNECTED".
Unplug/plug fibre to Sun StorEdge SE3510FC path sometimes fails to recover.
Symptoms to look out for:
- Unplug fibre cable, /var/adm/messages would show messages similar to the following:
In this case, the path will remain unusable, and additionally, the multipathing driver would not be able to use the path, and no further messages can be observed.
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