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RX6600 scsi address issue...

 
Dave Cast
Frequent Advisor

RX6600 scsi address issue...

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
Today is different and tomorrow the same.
5 REPLIES 5
melvyn burnard
Honored Contributor

Re: RX6600 scsi address issue...

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?
My house is the bank's, my money the wife's, But my opinions belong to me, not HP!
Dave Cast
Frequent Advisor

Re: RX6600 scsi address issue...

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)...
Today is different and tomorrow the same.
Torsten.
Acclaimed Contributor

Re: RX6600 scsi address issue...

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.

Hope this helps!
Regards
Torsten.

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Dave Cast
Frequent Advisor

Re: RX6600 scsi address issue...

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.
Today is different and tomorrow the same.
Torsten.
Acclaimed Contributor

Re: RX6600 scsi address issue...

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


Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!