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Date: Wed, 14 Oct 2009 18:57:21 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: questions@freebsd.org
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	(wonkity.com [127.0.0.1]); Wed, 14 Oct 2009 18:57:21 -0600 (MDT)
Cc: 
Subject: mkisofs error
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My data backups to DVD use mkisofs to build ISO9660 DVDs like so:

mkisofs -J -joliet-long -r -hide-rr-moved -graft-points dir1 dir2 dir3

and then piped into cdrecord.  However, I found a problem with one file 
that casts some doubt on the whole process.  The file is named 
img_0185-6x4crop.jpg and is 3,309,906 bytes.  On the hard drive, it 
reads fine.

The filename is present on the DVD, but the file always gives a read 
error:

# file img_0185-6x4crop.jpg
img_0185-6x4crop.jpg: ERROR: cannot read `img_0185-6x4crop.jpg' 
(Input/output error)

It's not a one-time error; every DVD always has the same problem.  What 
is going wrong?  A poison filename?

-Warren Block * Rapid City, South Dakota USA