Both of our F760s report "Fast/Wide, Differential".  Output from one is below.

C:\WINDOWS>rsh oldnirvana sysconfig -v
        NetApp Release 6.2.1R2: Wed Oct 23 12:01:54 PDT 2002
        ----
        slot 0: SCSI Host Adapter 0b (Qlogic ISP 1040B)
                Fast/Wide, Differential
                Firmware Version 4.66.00                Clock Rate 60MHz.
        ----

Jeff Mery, MCP
National Instruments

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Harold White <harold.white@covaro.com>
Sent by: owner-toasters@mathworks.com

12/05/2003 10:50 AM

       
        To:        toasters@mathworks.com
        cc:        
        Subject:        F760 SCSI, Single-ended or Differential



Greetings,

I just noticed that my F760 displays, what I believe to be, its on-board
external SCSI port as "Fast/Wide, Single-ended"

F760> sysconfig -v
       NetApp Release 6.4R1: Thu Mar 13 22:59:45 PST 2003
       ....
       slot 0: SCSI Host Adapter 0b (Qlogic ISP 1040B, <ONLINE>)
               Fast/Wide, Single-ended
               Firmware Version 4.66.00                Clock Rate 60MHz.
               4:  Tape: Quantum DLT7000 245F
               5:  Tape: Quantum DLT7000 245F
        .....

I am/was under the impression that it was a Fast/Wide Differential
(on-board) SCSI controller.

I have 2 DLT7000 drives connected to the Filer ... and they are
absolutely differential (2 drives from a Sun L1000).

My Veritas Datacenter software keeps down'ing one of my drives and I
have just ignored it due to time constraints plus the fact that I
had/have one good drive still working.  

But now that I am trying to troubleshoot the problem, I do not know if
the problem is that I have been lucky that a "Single-ended" filer
controller has been providing me good backups to my differential (one)
tape drive?  (Is that even supposed to work at all?)

Can anyone confirm that the output (sysconfig -v) of a F760
"Single-ended" is correct or incorrect?
That is, is the on-board external SCSI port a differential or
single-ended SCSI port and the "sysconfig -v" message is right or wrong?

Regards,
Harold White
Covaro Networks