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From: evans@syd.dit.CSIRO.AU (Bruce.Evans)
Newsgroups: comp.os.minix
Subject: Re: dd can't read my 1.2M drive
Message-ID: <1990Oct25.071937.14624@syd.dit.CSIRO.AU>
Date: 25 Oct 90 07:19:37 GMT
References: <16.27214A99@ssci.UUCP>
Organization: CSIRO Division of Info Tech, Sydney, Australia
Lines: 18

In article <16.27214A99@ssci.UUCP> postmaster@ssci.UUCP (Kevin Benton) writes:
>In an article of <18 Oct 90 13:38:28 GMT>, traw@grad1.cis.upenn.edu writes:
> >   I am trying to use dd to copy a 1.2M minix binaries diskette (one of
> >the ones supplied with minix).  I get an error telling me that minix
> >can't read the disk (then 0 blocks in, 0 blocks out).  I used the
> >following command line:
> >
> >$ dd /dev/at0 diskfile bs=7680          # several other blocksizes tried
>
>No problem....  Try this...
>
>dd if=/dev/at0 of=/usr/tmp/disk.image bs=1024 count=1200

Better, us bs=15360 (both sides of one track). The original has half this size,
but that may not work so well since it uses an odd number of sectors, depending
on how well FS hides the mismatch.
-- 
Bruce Evans		evans@syd.dit.csiro.au