can't kill fbackup fbackupwrtr process

[Brendon Pace]

Hi,

I have accidentally sent a SIGKILL rather than a SIGTERM to some fbackup processes that were hung and I am now left with one fbackupwrtr process that I can't kill with -9 or -15:

root 18006 1 0 Aug 15 ? 14:19 /usr/sbin/fbackupwrtr 157703 262144 4 C 0 0 /dev/rmt/0m

Would anyone know how I can get rid of this process? I have cleaned and reset the DDS3 tape library.

Thanks
Brendon

[IT_2007]

You may have to reboot server since you are not able to kill hung process.

[A. Clay Stephenson]

It is stuck waiting on I/O that will never complete. You may be able to force the drive to eject the tape; if it is an external tape drive then power it off. That will satisfy the i/o and your process can now respond to your signal (kill).

[Brendon Pace]

I powered off the unit but could still not kill the process. Rebooting the server is not really an option for me either

[Rajeev Shukla]

Yes thats right, its waiting for I/O and will never die by killing it.
Turning off the drive might help, but you have leave it off for a while (until the I/O tries to access the tape and when doesn't find the drive it will die itself)

[Brendon Pace]

Ok, I will try leaving the tape unit turned off for a while and see what happens, thanks all for your efforts

[Michael Steele_2]

What you need to determine is whether or not the tape drive is hot swappable. Similar hangs appear in hot swappable jamica SCSI drives and only by pulling the jamica drive out of its drawer would the I/O process die off. Some tape drives can also get away with this. But I'd do some research on the product number before attempting it. If you talk to an HP CE about it they will tell you that it works 90% of the time on DAT drives but there is a chance of problems developing once in awhile.

So what's the product number? (* ioscan -funC tape *)

[Brendon Pace]

I assume product number is C1557A. I swapped the scsi cable with the one running into the cdrom and then did "addhardware", however the same result returned when running ioscan

# ioscan -funC tape
Class I H/W Path Driver S/W State H/W Type Description
======================================================================
tape 0 14/0/3.0.0 stape CLAIMED DEVICE HP C1557A
/dev/rmt/0m /dev/rmt/c3t0d0BESTnb
/dev/rmt/0mb /dev/rmt/c3t0d0DDS
/dev/rmt/0mn /dev/rmt/c3t0d0DDSb
/dev/rmt/c3t0d0BEST /dev/rmt/c3t0d0DDSn
/dev/rmt/c3t0d0BESTb /dev/rmt/c3t0d0DDSnb
/dev/rmt/c3t0d0BESTn

[Michael Steele_2]

Nope, can't do it.

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000080044559