Date: Sat, 06 Mar 2004 00:40:59 -0800 From: underway@comcast.net (Gary W. Swearingen) To: "David" <dvelez502@verizon.net> Cc: questions@freebsd.org Subject: Re: Can't mount cd9660 file system. Message-ID: <mellmecqqs.lme@mail.comcast.net> In-Reply-To: <001501c4032c$94fefe00$6601a8c0@david> (David's message of "Fri, 5 Mar 2004 22:39:02 -0500") References: <001501c4032c$94fefe00$6601a8c0@david>
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If you have doubts about your CD (but you probably shouldn't),
this should help:
iso_file="backup.iso"
blocksize=2048
## *** WARNING *** DVDs might be different *** WARNING ***
## Block size of ISO CDs. Nothing else will work (esp,in dd command).
blocks=$(( $(ls -l ${iso_file} | awk '{print $5;}') / ${blocksize} ))
bytes=$(( ${blocks} * ${blocksize} ))
if dd if=/dev/acd0 count=${blocks} bs=${blocksize} | diff - ${iso_file}; then
echo "NOTICE: Comparison OK. The CD seems OK."
else
echo "ERROR: The CD and file differred."
fi
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