*BSD News Article 46926


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From: jdowdal@cs.umd.edu (John Dowdal)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: NCR 815 SCSI problems w/2.0.5R and snap
Date: 15 Jul 1995 13:12:53 -0400
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 31
Distribution: world
Message-ID: <3u8sul$4sr@amanda.cs.umd.edu>
NNTP-Posting-Host: amanda.cs.umd.edu

I have attempted to boot the floppies from both the 2.0.5R and 950622-SNAP
leading to a "integer divide fault panic" after detecting SCSI devices, but
before completing the boot.

I have (according to linux):
scsi-ncr53c7,8xx : at PCI bus 0, device 14,  function 0
scsi-ncr53c7,8xx : NCR53c815 at memory 0xfefffc00, io 0xfc00, irq 9
  Vendor: ARCHIVE   Model: Python 25588-XXX  Rev: 2.96
  Type:   Sequential-Access                  ANSI SCSI revision: 02
Detected scsi tape st0 at scsi0, channel 0, id 4, lun 0
  Vendor: MICROP    Model: 2217-15MQ1001901  Rev: HQ30
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 5, lun 0
  Vendor: DEC       Model: DSP5400S          Rev: 427L
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi disk sdb at scsi0, channel 0, id 6, lun 0

All of these devices work under linux.

When I boot the freebsd disk with the DEC disk connected to the SCSI
bus, the "integer divide fault" occurs.  If I remove the disk, I can
successfully boot to the freebsd install program.

I see two potential problems
1) Disk is currently partitioned by OS2 fdisk for 2 equal linux partitions
   of 1949664 1K blocks.  I partititioned the disk using a Future Domain
   1670 controller.  I replaced the controller with a NCR 815.  Could
   this lead to geometry problems that could lead to the panic?
2) Does freebsd support disks >2GB?

John