On Tue, 3 Apr 2001, Pete Peterson wrote:
Here is how to verify a CD after you burn a ISO, I assume you know what a
MD5 check sum is. First mount you CD that you wish to verify, I am using
respin disk1 in my example. Type df -k
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/hda1 2522048 1354256 1039676 57% /
/dev/hda2 1233340 424224 746464 37% /home
/dev/hdc 659912 659912 0 100% /mnt/cdrom
next divide the number of 1K blocks on the CD by 2 giving you the number
of 2K blocks, CD use 2K blocks. Next use dd to read the entire CD and
pipe it into md5sum
$ dd if=/dev/cdrom bs=2048 count=329956 | md5sum
329956+0 records in
329956+0 records out
fc9c2c23b02d2a35b75845530db81743 -
the CD does not need to be mounted to perform the last command.
> I'd like to be able to verify a CD I made from the ISO images, or from
> a copy of such a CD. I made a copy of my wolverine CDs for a friend
> and he got a file error when attempting the install and I'd like to
> be able to verify copies against the original MD5 sums..
>
> I've searched all the archives I could find and didn't find a way to do
> that. I thought I should be able to use some "dd" incantation piped
> into "md5sum", but I couldn't seem to make it work. I probably have
> some problem with the blocking.
>
> Any suggestions?
>
>
> pete peterson
> GenRad, Inc.
> 7 Technology Park Drive
> Westford, MA 01886-0033
>
> [EMAIL PROTECTED] or [EMAIL PROTECTED]
> +1-978-589-7478 (GenRad); +1-978-256-5829 (Home: Chelmsford, MA)
> +1-978-589-2088 (Closest FAX); +1-978-589-7007 (Main GenRad FAX)
>
>
>
>
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>
Rob Fausey.
These are not the droids you're looking for. Move along. Move along.
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