*BSD News Article 41865


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From: ferror@eden.com (Lee Feistel)
Newsgroups: comp.os.386bsd.bugs
Subject: Bug with CDROM changer
Date: 29 Jan 1995 05:50:43 GMT
Organization: Adhesive Media, Inc.
Lines: 31
Message-ID: <3gfabj$m24@boris.eden.com>
NNTP-Posting-Host: matrix.eden.com
X-Newsreader: TIN [version 1.2 PL2]

I am having a problem with FreeBSD.

I have two computers, one is a:
   486sx/25 w/ 8 megs memory (ISA)
   200MB Disk Space (IDE)
   NE2000 with i/o 300, irq 5
   Panasonic Single Spin 6-Disk CDROM Changer
   Adaptec 1510

other is a:
   486/33 w/ 16 megs memory (ISA)
   345MB Disk Space (SCSI)
   NE2000 with i/o 300, irq 5
   Panasonic Single Spin 6-Disk CDROM Changer
   Adaptec 1542B

Both running FreeBSD-RELEASE (version 2.0)

Both will run fine in all respects but will invariably
panic after any intensive CDROM access. I have all the cdroms mounted,
and they seem to work fine, but the kernel will panic every time after
I try to access any fairly large file (800+ K).. I don't think the 
problem could be in hardware, because I have the same problem on both 
machines. Also, I have the timings set to 5.0 MB/Sec on both cards.
I'm out of ideas- I used to run Linux, and the changers worked fine.
Anyone know of any way to tweak the kernel to fix this?

Thanks,
Lee Feistel
ferror@eden.com