ioscan - scsi ids

[Karthik Narayanan_4]

Hi,
I have HP-MCSG Clustered with 2 nodes and SCSI chained. The SCSI initiator ids on both the nodes show,
0/6/2/0.7.0

Should the SCSI initiator ids be different on both the nodes?

Thanks
Karthik

[melvyn burnard]

is this hw path one of the shared paths?
if so, then they MUST be different scsi id's
If it is not a shared bus, then no problem.

[A. Clay Stephenson · Accepted solution]

They absolutely must be different; typically one is left at 7 and the other is set to 6. Depending on your platform and SCSI HBA, ioscan may not display the remote controller. In any event, all devices on a bus MUST have unique ID's.

[Karthik Narayanan_4]

Hi,
How would I proceed to change the SCSI ids?

Thanks,
Karthik

[A. Clay Stephenson]

Since you haven't told us your hardware, that's difficult to know. You typically pull the card and move jumpers but some can be configured from the firmware monitor.

[Karthik Narayanan_4]

Hi,
I was told by the HP support to change is throught the firmware. How would I proceed doing it.

Thanks
Karthik

[A. Clay Stephenson]

Since you still haven't identified your hardware, I can't tell you for certain. Typically, you interrupt the boot process. You should see a SCSI command. You should identify the device path and issue a SCSI ID command. There should be a help command and a HELP SCSI command in the firmware monitor.

[Daniel Baird]

Being new to HPUX, I've come looking for an answer to a similar question. I'd like to do what i'm used to doing with Sun hardware, have two servers on the one SCSI bus. I just need to know, if possible, how to change the SCSI initiator ID on a particular SCSI controller.

in my case i have;

ext_bus 6 0/4/2/0/4/0 c720 CLAIMED INTERFACE SCSI C896 Ultra2 Wide LVD
target 9 0/4/2/0/4/0.7 tgt CLAIMED DEVICE
ctl 6 0/4/2/0/4/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c6t7d0

on
HP-UX labmsc11 B.11.11 U 9000/800 1191464655 unlimited-user license

Regards,

DAniel