*BSD News Article 44114


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From: hdslip@iii1.iii.net (HD Associates)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: february SNAP: big files are cluttered with 0xff characters sometimes -- why?
Date: 15 May 1995 12:10:32 -0400
Organization: HD Associates, Inc.
Lines: 28
Message-ID: <3p7ueb$7gq@iii1.iii.net>
References: <3ovfof$j74@ra.ibr.cs.tu-bs.de>
NNTP-Posting-Host: iii1.iii.net
Keywords: bug scsi aha1542

In article <3ovfof$j74@ra.ibr.cs.tu-bs.de>,
Martin Butkus <y0001415@ws.rz.tu-bs.de> wrote:
>Hi!
>

>
>and killing the process when the file is about 100MB in size, I often find that
>groups of eight bytes get replaced by 0xff characters. These groups always
>start at byte boundaries dividable by 2048. When I ktraced the I/O
>of "yes" I found no errors there. (Besides, there were no errors in the
>log file used by ktrace!) Has anyone ever heard of such problems?

(...)

>- Adaptec 1542A

There may be some problems with the 1542A that have cropped up,
perhaps because the I/O is being exercised more due to more
effective clustering.  I now have a 1542A (thanks to Marc Ramirez)
and will do some testing as soon as I can get a test system that
handles boards as long as those old 1542A's are.

Peter

-- 
Peter Dufault               Real Time Machine Control and Simulation
HD Associates, Inc.         Voice: 508 433 6936
dufault@hda.com             Fax:   508 433 5267