I asked the list a question that I use Wide Differential disks and
Wide Differential controller, yet I can not use SCSI IDs over 7.
Kulp, Scott provided an answer which I think is correct.
501-1902 does not support address over 7, 370-1703 and 370-1704 do.
My adaptor is 501-1902.
I also checked the SCSI FAQ:
which says that "WIDE SCSI devices on a SCSI-3 system with 68
pin P cable can use IDs 0 through 15". So I think 501-1902
is not SCSI-3 compliant.
Many people said that I need to edit /kernel/drv/sd.conf, which I don't
that is correct. Because (1) I can not see the disk with SCSI ID > 7 when
I use probe-scsi-all as stated in the problem, and probe-scsi-all has
nothing to do with sd.conf. (2) sd.conf by default does support SCSI IDs
0-15, it needs edited if you use higher lun numbers.
I would like to thank the following nice folks for their time and
effort. The full question and answer are attached at the end.
Arthur J. Byrnes
David L. Markowitz
> > From: Michael Wang[SMTP:email@example.com]
> > Sent: Thursday, October 28, 1999 12:53 PM
> > To: firstname.lastname@example.org
> > Subject: can not use SCSI IDs above 7 for Wide Differential disks on
> > Sparc 2
> > I have a Sparc II, and installed a Wide Differential SCSI adaptor,
> > and use a 68pin cable connected to a IBM Wide Differential
> > disk "DFHSS4x". According to IBM documentation, it should have SCSI
> > addresses 0-15, but if I set SCSI ID > 7, boot-scsi-all does not
> > see the disk anymore.
> > I did use a multiple connect SCSI cable, and connect a TERMINATOR,
> > but it does help.
> > So I wonder where the problem might be. The disk (unlikely), the cable,
> > the SCSI adaptor, the Sparc 2, or me? Thanks.
> > Michael Wang
> > http://www.mindspring.com/~mwang
> From: "Kulp, Scott (Scott)** CTR **" <email@example.com>
> THERE IS A POSSIBILITY THAT IF YOU ARE USING THE 501-1902 IT MAY
> ONLY SUPPORT UP TO 7 ADDRESSES. THE 370-1703 AND 370-1704 HAVE NOTES
> STATING THEY SUPPORT 15 ADDRESSES. LOOK FOR THE DSBE/S MANUAL IF YOU HAVE
> THE 501-1902.
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