fiber channel driver link dead notification

[khilari]

I am getting fiber channel driver link dead notification on my dmesg and syslog.log.
I ioscanned them and i see them as claimed, from the OS side what else can i do...
Would rebooting the system help...
Running some command...
Kindly, let me know.
Thanks

[Duncan Edmonstone · Accepted solution]

Could have been an intemittent failure. You can see if your FC cards are up and logged into the SAN fabric by using fcmsutil.

Use ioscan to identify your FC cards:

ioscan -funC fc

Then use fcmsutil on the devices you identify from ioscan, e.g.

fcmsutil /dev/td0

or

fcmsutil /dev/fcd0

If the cards are up and logged in, you should see:

Topology = PTTOPT_FABRIC


HTH

Duncan

[Steven E. Protter]

Shalom,

use fcmsutil to validate the actual fiber status.

There may actually be a problem. The mark 1 eyeball method, aka physically inspecting the connection and looking for proper lights is also recommended.

SEP

[System Unix]

Hi,

I would look for the Driver state = ONLINE to see the status of the link, when issueing the command /opt/fcms/bin/fcmsutil /dev/tdX

rgds,

Reuven

[khilari]

It says TOPOLOGY=private loop.
Other than that every thing seems fine....
Driver state is online...

[Sp4admin]

You can use the "fcmsutil" command to reset the FC card. Just make sure that the alternate path is set up. If you reset the card and only have one path this cause a problem.

sp,

[Bill Hassell]

Are these links directly attached to a disk or tape or do they go through a SAN switch? If the link is connected to tape drives, this is normal (although very annoying). Whenever you power off or reset a tape drive, the fiber channel card and driver complain about lost addresses. This is the reason that you explicitly disable EMS diagnostic notifications for removable media such as tape drives.

[SUDHAKAR_18]

Hi,
I suspect your link to storage is down for a fraction of time. and now it is ok.You can login to storage GUI & check for errors. If no events found ,you can ignore this message.

Regards,
SHR