topic Re: autopath errors in Operating System - HP-UX

autopath errors

S.S. — Fri, 26 Feb 2010 12:21:02 GMT

Hi All,

Today, i was unknowingly deleted a vdisk at EVA in which the related device files are available at host (HP-UX 11.11).

I have found that in the ioscan output some device files are detected with no hardware. These device files are related to a filesystem which is a test one.

In the autopath display output, there these device files are with failed status.

Now i have tried to export this volume group and have received the warning as "device is busy".

Also, checked the process of autopath in which "autopath monitor" is running and also in the syslog pulling the following error for every second.
"AUTOPATH : All the paths to the end device failed"

Kindly recommend me how can i troubleshoot this problem.

Thanks!

Re: autopath errors

Jupinder Bedi — Fri, 26 Feb 2010 12:49:59 GMT

try with the command

#autopath discover

Good Luck

Re: autopath errors

Jupinder Bedi — Fri, 26 Feb 2010 12:50:41 GMT

and than run

#insf -e

Re: autopath errors

HCL Ash — Fri, 26 Feb 2010 14:24:21 GMT

insf -eC disk

This will create the device files

Re: autopath errors

S.S. — Sat, 27 Feb 2010 02:02:02 GMT

Hi All,

I have executed the above you stated, autopath discover, insf -eC disk but there is no luck; the autopath errors are still pulling out in the syslog file and observed that the "autopath monitor" is running.

I also tried to delete that device path in that autopath; by using "autopath delete /dev/dsk/c#t#d#" but with the warning message that "AUTOPATH: is busy".

Also i am afraid that this will make any cause to other filesystems on that server? kindly suggest me the impact of this problem because i was unable to resolve this yesterday and could go to office on Monday.

Thanks!

Re: autopath errors

Johnson Punniyalingam — Sat, 27 Feb 2010 02:38:30 GMT

It would be always better to shutdown the applications on the server that uses these LUNS and umount the filesystems prior to doing your EVA work.

Reboot the machine, hope fully it will soloved the problems

Re: autopath errors

S.S. — Sat, 27 Feb 2010 08:23:35 GMT

Hi Johnson,

I have tried to deactivate the volume group but it is not allowing me and unable to export the vg.

Also kindly suggest me how can i stop the "auto path monitor" as currently running due to that autopath errors are pulling to syslog.log file and also unable to delete the LUNS in autopath saying that the device is busy.

Suppose if i reboot the system then in that case prior to reboot i should umount and export the vg right and also may i know after reboot the autopath error msgs will stop?

Thanks!

Re: autopath errors

Jupinder Bedi — Sat, 27 Feb 2010 08:35:07 GMT

you can stop the autopath as follows

/sbin/init.d/autopathinit stop

Good Luck

Re: autopath errors

S.S. — Mon, 01 Mar 2010 07:10:35 GMT

Hi,

Now i ran the ignite backup and it got failed with the following message:

lvlnboot: Couldn't query physical volume "/dev/dsk/c10t1d1":
The specified path does not correspond to physical volume attached to
this volume group
save_config: Error - The command "lvlnboot" returns a non-zero value. You may use "vgscan
-v " command to recreate the "/etc/lvmtab" file.
ERROR: /opt/ignite/bin/save_config failed

Can i perform the "vgscan -v" command?

Actually the device "/dev/dsk/c10t1d1" is using that live filesystem. If i execute the above command the problem could be resolved?

Thanks & Regards

Re: autopath errors

Kapil Jha — Mon, 01 Mar 2010 07:26:14 GMT

Yes you can run vgscan it just creates the lvmtab file.
Better you move old lvmtab and then run
vgscan(1)
read man page for more information.

Check in ioscanas well if they path is available.

BR,
Kapil+

Re: autopath errors

S.S. — Mon, 01 Mar 2010 07:49:35 GMT

Hi Kapil,

This device file is not available.

Even though also if i run the vgscan command does it cause any problem?

Thanks & Regards

Re: autopath errors

Kapil Jha — Mon, 01 Mar 2010 07:58:26 GMT

Which is this device its not root device right, if its not available you may have to fix it so that server can see this device.

Well even if its not there vgscan sould not complaint and create lvmtab file again.

You can safely run it, this would not trouble it.

BR,
Kapil+

Re: autopath errors

S.S. — Mon, 01 Mar 2010 10:27:51 GMT

Hi,

I ran the vgscan -v and started the ignite backup but no luck.

Anyhow i got a downtime to restart the server after 2 hours.
Can anyone suggest me, still in the /etc/lvmtab file the entries:
/dev/Test_vgworking
K]1?
/dev/dsk/c10t1d5
/dev/dsk/c14t1d0
/dev/dsk/c10t1d0
are available. After reboot these entries will clearup because due to this the ignite backup has not done as these device files are no more but the entries are there in /etc/lvmtab file.

I have tried to export the vg related to this device files but unable to do and received the warning message as "Device is busy"

Thanks!

Re: autopath errors

Johnson Punniyalingam — Mon, 01 Mar 2010 11:54:39 GMT

>>I have tried to export the vg related to this device files but unable to do and received the warning message as "Device is busy<<

# vgexport -f /dev/Test_vgworking
# cp -p /etc/lvmtab /etc/lvmtab.org -> backup
# mv /etc/lvmtab /etc/lvmtab.bkp.Mar012010 -> rename /etc/lvmtab
# /usr/sbin/vgscan -v

HTH,

Johnson

Re: autopath errors

S.S. — Tue, 02 Mar 2010 02:36:26 GMT

Thank you Kapil and Johnson.

As Johnson, said yesterday i have rebooted the server and all the failed device files in autopath got cleared and this time i successfully exported the vg.

Specially Thanks to you guys as i sorted many of my problems with the help of you.