replace_dsk command issue

[likid0]

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!

[Chauhan Amit]

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

[likid0]

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 ??

[Chauhan Amit · Accepted solution]

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

[likid0]

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

[Chauhan Amit]

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.

[Torsten.]

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.

[likid0]

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

[marie-noelle jeanson_1]

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.