3.0 -> 3.1 conversion and maxtor drives ...

[Paul Killey]

On our 3100s we have installed here so far, we use Maxtor disk drives
pretty much exclusively.  The ones we use are the XT-8760S and
XT-4380S.

When we converted from 3.0 to 3.1, the 380 continued to work but the
machines with the 760s on them would not come up, regardless of whether
the disk was the boot device or not.

To make a long story short, I dicovered that changing that the flags
field in the scsi_devtab struct in /sys/data/scsi_data.c from
SCSI_TRYSYNC|SCSI_STARTUNIT|SCSI_REQSNS|SCSI_TESTUNITREADY|SCSI_READCAPACITY
to
SCSI_TRYSYNC||SCSI_REQSNS|SCSI_TESTUNITREADY|SCSI_READCAPACITY
made the 760s work again.  (I dropped the SCSI_STARTUNIT thang).

Anybody who knows why more bits are turned on in the rz80 entry than
the rz55 entry is invited to say something about it here.  Or about scsi 
differences between 3.0 and 3.1 ...

--paul

(313) 763-4910

{mailrus,sharkey,umix}!paul

(Am trying to post this with rrn ... hope it is working, you all see
this once, etc.)