topic replace_dsk command issue in Operating System - HP-UX

replace_dsk command issue

likid0 — Mon, 10 Jul 2006 01:39:26 GMT

Hy people:
I get this error in syslog:

0/0/14/0/0: Unable to access previously accessed device at nport ID 0x757613.
Jul 7 20:16:42 vmunix: 0/0/14/0/0: 'World-wide name' (unique identifier) for device at nport ID 0x757613 has
Jul 7 20:16:42 vmunix: changed. If the device has been replaced intentio nally, please use the
Jul 7 20:16:42 vmunix: fcmsutil(1M) command's replace_dsk option to allo w the new device to be used.
Jul 7 20:16:42 vmunix: 0/0/14/0/0: Fibre Channel Driver detected a parse error in the FLOGI/PLOGI response
Jul 7 20:16:42 vmunix: returned by nport ID 0x757613. FLOGI/PLOGI Fail C ode = 0x6.
Jul 7 20:16:42 grifo1 vmunix:

I imagine i get this error because a wwn has changed for a disk in the san ??

do i get this error using?:

fcmsutil /dev/td0 replace_dsk 0x757613

is it safe to do it with the disks on-line and working?

thnx a lot for your help!

Re: replace_dsk command issue

Chauhan Amit — Mon, 10 Jul 2006 02:01:37 GMT

Hello Daniel,

You are right in mentioning that you are getting this error because wwn has changed.

It is very much safe to run the fcmsutil commmand on an on-line disk , if still the error exists you need to remove the corresponding H/W path and reboot the system.

-Amit
PS: do remember to assign points

Re: replace_dsk command issue

likid0 — Mon, 10 Jul 2006 02:17:40 GMT

And which is the nport i have to put in the command ??

beacuse i get this message:

0/0/14/0/0: Unable to access previously accessed device at nport ID 0x757613.
0/0/14/0/0: 'World-wide name' (unique identifier) for device at nport ID 0x75761 3 has
changed

i get two nport ids 0x757613 and 0x75761 which one is the one i have to include with the command replace_dsk ??

Re: replace_dsk command issue

Chauhan Amit — Mon, 10 Jul 2006 02:28:44 GMT

You need to give the following command:

#fcmsutil /dev/td0 replace_dsk 0x757613

After running the above command, you will get a message indicating the port will
not be authenticated:
Disk at nportid 0x757613 (Loop_id x) will not be authenticated

Hope this helps,
Amit

Re: replace_dsk command issue

likid0 — Mon, 10 Jul 2006 05:14:47 GMT

Thnx a lot for your help the msg has gone.

But for my knoledge, what does replace_dsk exacly do?

or a link to some doc about this command, im not clear what i just did ;d

Re: replace_dsk command issue

Chauhan Amit — Mon, 10 Jul 2006 05:23:49 GMT

Hello,

The replace_dsk option of fcmsutil is neccessary in order to change a device and keep the same nport_id but primarily, it should be used when replacing a bad disk. When this option is used, no authentication on that device is performed the next time system communicates with it thus avoiding the error message in the syslog.

-Amit
PS - Do remember to assign points.

Re: replace_dsk command issue

Torsten. — Mon, 10 Jul 2006 07:05:46 GMT

Did you replace anything?

This indicates normally, a device with the same nport ID now has another WWN. The driver will block this device and you will see NO_HW in ioscan. Now you are going to tell the driver, "let the device in" by issuing the repace_dsk command.

Re: replace_dsk command issue

likid0 — Mon, 10 Jul 2006 08:58:16 GMT

So u use the command to block or unblock the disc??

lets say u have a faulty disc, before u remove it you give it a replace_dsk the change the disc and its wwn changes... do you have to do something else to see the new disk??

ups getting mixed up here ;D

Thnx all

Re: replace_dsk command issue

marie-noelle jeanson_1 — Mon, 10 Jul 2006 21:48:53 GMT

Hi,

For all details, look at the FC support guide here:
http://docs.hp.com/en/J6374-90035/ch04s03.html

Scroll to Device Replacement without System Reboot. It tells you all about the replace_dsk command,

Marie.