how to determine a single-ended / differential scsi?

[SlopeZ]

Hi all,

how can i determine if an installed scsi adapter is single-ended or differential type?
i'm trying with hwmgr tool.

ES40 alphaserver, Tru64 5.1

Thanks in advance

[Ross Minkov]

If you have physical access to the server just go and look at the back of the adapter. It will be clearly marked SE or DIFF on the adapter.

[Stuart Fuller_2 · Accepted solution]

Are you trying to determine this in a script or a program, or are you just trying to determine this without looking at the machine (because the machine is 500 miles away)?

If the latter, then use the command:

uerf -Rr 300 | more

This will show you the hardware inventory from the most recent boot. Read the output. On our system, I see the following:

IntraServer ROM Version V2.0 (c)1998
scsi0 at itpsa0 slot 0 rad 0
itpsa1 at pci2 slot 1
IntraServer ROM Version V2.0 (c)1998
scsi1 at itpsa1 slot 0 rad 0

These are the two SCSI ports on a KZPCMC-DA, and these ports are SE.

Further on, on our system, I see:

isp0 at pci1 slot 5
isp0: QLOGIC ISP1040B/V2 -
_Differential Mode
isp0: Firmware revision 5.57 (loaded
_by console)
isp0: Fast RAM timing enabled.

This is a KZPCA-CB (I know this, because I just installed that card last week), which is known to be a DIFF port. The commentary above confirms it.

So, if you can't figure out what you have, post the relevant portions of the uerf output, and we might be able to sort it out.

[SlopeZ]

Hi all,
i'm not near the host.

i've used uerf -Rr 300 :

isp0 at pci0 slot 3
isp0: QLOGIC ISP1040B/V2 -
_Differential Mode
isp0: Firmware revision 5.57 (loaded
_by console)
isp0: Fast RAM timing enabled.

It's a differential like show the report.


Thanks very much!

Regards,
Santibon!

[SlopeZ]

Information in /var/adm/messages about booting process contains the solution.