*BSD News Article 61350


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From: mark@ucsalf.ac.uk (Mark Powell)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: SCSI problems performing writes to FAST SCSI-2 drives
Date: 13 Feb 1996 19:04:11 GMT
Organization: Computer Services Unit, University College Salford, Salford, UK
Lines: 24
Message-ID: <4fqnbb$f7v@viking.ucsalf.ac.uk>
NNTP-Posting-Host: scot1.ucsalf.ac.uk

Hi,
  Trying to get a Conner CFP4207S 4Gb FAST SCSI-2 drive to install under
2.1.0-RELEASE. The system has problems writing even the partition table to 
the disk. The write falls over with the following on VTY2:

ahc_scsi_cmd0: more than 256 DMA segs
sd0: oops not queued
biodone: buffer already done
init died (signal 0, exit 1)

I have been occasionally to get past the partition write, but it mentions it
can't mount swap and then fails to make the filesystems.
This also happens with an IBM DFHS S2F 2Gb FAST SCSI-2 drive. It happens with
a 1542C, 1542CF, AHA 2940 controller and on two different machines 100MHz 
Pentium and non PCI DX2 66MHz. Same problem, but different number of DMA segs on the 
1542 (less SCB's??.) With a DEC DSP5200S 2Gb SCSI-2 (not FAST) I have no problems
at all on either machine with any SCSI adapter. I'd really like a FAST drive though.
Any ideas what this could be?
TIA
-- 
Mark Powell - Senior Network Technician - Room: C806
Computer Services Unit, University College Salford, Salford, UK.
Tel:	+44 161 745 3376	Fax:	+44 161 736 3596
Email:	mark@ucsalf.ac.uk	finger mark@ucsalf.ac.uk (for PGP key)