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SCSI ID's and Hardware Path

 
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Honored Contributor

SCSI ID's and Hardware Path

I want to include a new disk in my K-360 server, so I have to jumper to a not-used SCSI-ID.

looking at ioscan -fnC disk I see the disks already installed, but can I determine the SCSI-ID from this output ??.

I guess the HW-PATH gives this info but I am not sure.

disk 0 10/0.4.0 sdisk CLAIMED DEVICE SEAGATE...
disk 1 10/0.5.0 sdisk CLAIMED DEVICE SEAGATE...
disk 2 10/0.6.0 sdisk CLAIMED DEVICE SEAGATE...

Does this mean my installed disks have SCSI-ID's 4,5 and 6

Thank in advance

 

 

P.S. This thread has been moevd from Disk to HP-UX > sysadmin. - Hp Forum Moderator

He's a real UNIX Man, sitting in his UNIX LAN making all his UNIX plans for nobody ...
3 REPLIES 3
Respected Contributor

Re: SCSI ID's and Hardware Path

Hi,

You are correct, the 4, 5 and 6 are the SCSI ids. 10/0 is the bus address.
The surest sign that life exists elsewhere in the universe is that none of it has tried to contact us
Honored Contributor
Solution

Re: SCSI ID's and Hardware Path

Yes exactly, SCSI ID, 4, 5, 6 are present.
As disks.
There is also a 7 which is your initiator but shows up not in class (first colum) disk but as sctl.

disk 0 10/0.4.0 sdisk CLAIMED DEVICE SEAGATE...
disk 1 10/0.5.0 sdisk CLAIMED DEVICE SEAGATE...
disk 2 10/0.6.0 sdisk CLAIMED DEVICE SEAGATE...

You should do an
ioscan -fnkH10/0

You will find that
ext_bus 3 10/0
is the bus identifier
ie: c3 in your device file
the 3 may be something else depending on how many ext_bus 'es were found before that one.

the SCSI ids show up as class tgt
ext_bus 3 10/0
tgt 0 10/0.4
disk 0 10/0.4.0
tgt 1 10/0.5
disk 1 10/0.5.0
sctl 3 10/0.7

The device file is
c(ext_bus instance number, here 3)t(last digit in class target)d0 (can be up to 7 if there is a disk array, in the case of a standalone disk is always 0)
so
c3t4d0
and c3t5d0 would be present in this case.

The new disk you add needs a unique id ( or else you may get panics or devices missing)
Refer to the disks jumper setting to set it's scsi id.

Later,
Bill
It works for me (tm)
Respected Contributor

Re: SCSI ID's and Hardware Path

Hi Rainer,

You are correct, but you have to consider that the SCSI card on the system board got also a scsi ID ! you need to avoid it .

Magdi