Changing Controller ID.

[Sam_28]

Can anyone suggest a way to change the controller number assigned to a Fibre Channel
HBA A5158A when connected to an external Disk
Array?

[Michael Tully]

If you need to change the controller, why not move the card to a different slot.
Some external disk arrays (EMC) use the controller number treated as a VBUS (virtual bus). If you have the expertise you can change the controller within the symmetrix configuration (definitely not recommended)

[Sridhar Bhaskarla]

Hi,

Are you talking about the instance number that appears with c? in the disk device file.

You can use 'ioinit' command to reassign the instance numbers. But becareful, changing instance numbers that affect the disks that are already configured into the volume groups will give you headache.

Look at man 'ioinit' for more information.

-Sri

[A. Clay Stephenson]

This is what the ioscan with the -M option is for. You can force the system to bind a driver and an Instance (the controller number) to a given hardware path. Man ioscan for details.

e.g.

ioscan -M tape2 -I 3 -H 12.2.1

[James Murtagh]

Hi,

I'm not exactly sure what you mean, I take it you mean you want to change the controller number assigned to the luns, not the FC card itself?

If so, you would need to rebuild your ioconfig, I gave some instructions in this thread:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x044828c64656d71190080090279cd0f9,00.html

Just be sure to export your volume groups etc before you do, as you will need to import them all again.

Have to say, it would be unusual to do this for a SAN attached devices?

Regards,

James.