RX6600 scsi address issue...

[Dave Cast]

I have an rx6600 running hpux 11.31 - I installed the os with ignite with all defaults just as I have with 5 other rx6600's, but when I went to setup mirroring of vg00 I noticed one of the servers had the os installed on scsi id 7 far right and bottom of the 8 drive configuration (see attached picture)...and since I would like to keep all our servers the same I powered the server down and switched the far left and up (scsi id 0) with the far right and bottom (scsi id 7) and powered the server on...

Here is the interesting part - when it came back up it booted from the drive (the only drive with an os on it) but STILL RETAINED THE OLD SCSI ADDRESS!! How is this possible?

TIA

[melvyn burnard]

when you say old scsi address, are you refewrring to the device files?
If so, in HP-UX 11.31 we now use Agile Addressing, where we address a disk drive as an OBJECT, not as in 11.23 or below where we address the disk as the PATH to the Object

When you move a disk, it is therefore seen as a disk the kernel already knows about, and keeps the same device files.

If this is NOT what you are referring to, could you give examples?

[Dave Cast]

Actually I am speaking of the SCSI id...I thought that was determined by where the drive was attached or some jumper setting on the drive itself...(case of old-school here)...

[Torsten.]

Nice picture, but this is a rx3600 ;-))

A disk has NEVER SCSI ID 7.

Anyway, the disks are SAS and this will change everything. SAS disks have SAS ID's.

If you move the disks, the controller will take care of this ID and the (legacy style) device file will remain.

[Dave Cast]

I used that picture to reduce confusion...all the pics of an rx6600 had the lower 'bay' filled with drives (an additional 8 drives)and such is not the case with my rx6600.

[Torsten.]

OK, I see.

To get more information you can use

sasmgr get_info -D /dev/sasd0 -q raid=all
or
sasmgr get_info -D /dev/sasd0 -q phy=all
or
sasmgr get_info -D /dev/sasd0 -q lun=all

Perhaps you need to adjust the device file sasd0 to sasd1 or whatever.


Here is the manual:

http://docs.hp.com/en/5992-3955/index.html