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Date:      Fri, 14 May 1999 23:03:07 +0100
From:      Paul Civati <paul@xciv.org>
To:        freebsd-hardware@freebsd.org
Subject:   Need help diagnosing hardware problem
Message-ID:  <E10iQ2u-00078m-00@mailhost.xciv.org>

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I have a 486DX4-100, which ran FreeBSD 2.1.0-R fine for about a year,
it was then left unused for a while when I upgraded to a new machine.

I've now replaced the IDE disk with a (brand new) <Adaptec 2940A Ultra
SCSI host adapter> and IBM DDRS-34560 disk.

The machine has installed 2.2.8-R fine, and built a new kernel, but
I have problems doing things like (with large files):

# gzip -dc linux-2.0.36.tar.gz > test
gzip: linux-2.0.36.tar.gz: invalid compressed data--crc error
# ls -l test
-rw-r--r--  1 root  wheel  30228603 May 14 22:24 test
# gzip -l linux-2.0.36.tar.gz
compressed  uncompr. ratio uncompressed_name
  7269221  30228480  75.9% linux-2.0.36.tar

# gzip -dc fbsd227-srcsys.tar.gz > test
gzip: fbsd227-srcsys.tar.gz: invalid compressed data--crc error
# ls -l test
-rw-r--r--  1 root  wheel  51681603 May 14 22:50 test
# gzip -l fbsd227-srcsys.tar.gz
compressed  uncompr. ratio uncompressed_name
 11012524  51681280  78.6% fbsd227-srcsys.tar

(I have used md5 to verify the tar files havn't been corrupted,
they extract fine on another machine, and there is plenty of
free disk space to extract them).

I don't *think* it's a memory problem, as I'm not getting any sig11
errors when compiling, and I've tried running with each 16M SIMM
separately.

(I also don't think it's an o/s problem, a test linux install
exhibited the same problem with the above test).

Parity is enabled on both controller and disk, and the disk is
terminated (it's the only device).

There are a few PCI related options in the system BIOS, but the
(Gigabyte 486-AM) m/b manual doesn't give any useful info other
than 'enable to enable this feature, disable to disable this 
feature' for a lot of them. :/

I'm thinking it's either a SCSI problem or one of the BIOS
options that didn't effect the system when it was IDE based.

Anyone have any tips on what the problem might be?

-Paul-


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