ioscan hung

[john flores]

ioscan -fnC
is hung. The process won't even die.
This is how it happened. I have an RP4440 with SCSI U320 cntlr connected to MSA30 Scsi drawer containing 2 disks. I added 4 more disks to the drawer. When I did the ioscan command it hung. EMS sent me a majorwarning SCSI bus reset message for each of the two existing drives. I recently upgraded to the latest SCSI driver.
scsiU320-00 B.11.11.0706 PCI-X SCSI U320; Supptd HW=A7173A/AB290A

[James R. Ferguson]

Hi John:

You are not going to be able to kill thie 'ioscan' (even with a 'kill -9') as long as it is waiting for a higher priority kernel event; viz an I/O complete.

You may have to reboot.

Regards!

...JRF...

[Hasan Atasoy]

hi john ;

it seems that bus is not ending properly .( no terminator at the end ) or scsi id duplication on the same bus .

Hasan

[Torsten.]

There is terminator to connect to a MSA30.
This is not the problem.

Maybe one of the disks is bad.

If not already configured, remove the disks and the ioscan will finish.

Insert them one by one and run ioscan again after each insertion.

Is the EMS/syslog message pointing to a specific disk?

[F Verschuren]

scsi termination is the most likely, some time it is caused by a single disk ore even disk slot, are you still able to take out the new disks. just to check this is not the cause, if it is a disk look if the conection are still streat. on both disk and msa30

[john flores]

I took all 4 new disks out but it didn't help. I still cannot kill the ioscan processes.
I'll probably have to reboot on Saturday. I'll put all 4 disks in while the system is down and hope it will see them when it boots up.
The EMS message always points to each of the two existing 70GB disks which are in use with no apparent problems.