[Linux-Anyway] md2sum and the variance in sector counts.
- From: John Richard Smith <BAGSOFCHOICE@xxxxxxxxxxxxxxxxxxxxx>
- To: Linux-Anyway@xxxxxxxxxxxxx
- Date: Sat, 13 Dec 2003 09:14:06 +0000
OK so I download an ISO, here is an example,
ftp://slackware.linux.no/pub/slackware/slackware-9.1-iso/slackware-9.1-source-d3.iso
and this is the published md5sum for it
eb5ac676306a78b3ec5c5aa033903669 slackware-9.1-source-d3.iso
I do the md5sum on completion.
eb5ac676306a78b3ec5c5aa033903669 slackware-9.1-source-d3.iso
all agrees just fine.
then I calculate the sectors manually on a calc
ls -ls 689995776 Sep 29 18:03 slackware-9.1-source-d3.iso
689995776/2048=336912
I burn to disc, and cdrecord reports,
689995776/690026496 (336927 sectors)
note 689995776 with ls -ls
but 690026496 is what ?
and 336927 doesn't agree with my manual count , why ?
also note,
dd if=/dev/scd0 bs=2048 count=336912 | md5sum -eb5ac676306a78b3ec5c5aa033903669
= agrees !!!
dd if=/dev/scd0 bs=2048 count=336927 | md5sum -9629fce7de668165a50f1becec49ea81
- wrong ?
So my question is why does cdrecord report a different sector count
and is it measuring something else ?
John
--
John Richard Smith
BAGSOFCHOICE@xxxxxxxxxxxxxxxxxxxxx
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