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sudden CD burner failure

I burned a CD using an iso image.
The CD worked.  It is mountable.
It's files are there.
Feeling paranoid, I tried to burn
another CD with the same image and
the same command.  cdrecord didn't
give me any complaints it hadn't
given me before, but the CD didn't work.
mount /dev/hdd
/dev/hdd: Invalid argument
mount: /dev/hdd: can't read superblock

Some of my effort:
[root hobbes tmp]# cdrecord  -dao dev=ATA:1,1,0 bin.iso
Cdrecord-Clone 2.01-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling
Note: This version is an unofficial (modified) version with DVD support
Note: and therefore may have bugs that are not present in the original.
Note: Please send bug reports or support requests to http://bugzilla.redhat.com/bugzilla
Note: The author of cdrecord should not be bothered with problems in this version.
scsidev: 'ATA:1,1,0'
devname: 'ATA'
scsibus: 1 target: 1 lun: 0
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
cdrecord: Warning: using inofficial libscg transport code version (schily - Red Hat-scsi-linux-sg.c-1.83-RH '@(#)scsi-linux-sg.c        1.83 04/05/20 Copyright 1997 J. Schilling').
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : 'HL-DT-ST'
Identifikation : 'CD-RW GCE-8481B '
Revision       : 'C102'
Device seems to be: Generic mmc CD-RW.
Using generic SCSI-3/mmc   CD-R/CD-RW driver (mmc_cdr).
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Speed set to 8467 KB/s
Starting to write CD/DVD at speed  48.0 in real SAO mode for single session.
Last chance to quit, starting real write    0 seconds. Operation starts.
cdrecord: WARNING: Drive returns wrong startsec (0) using -150
Track 01: Total bytes read/written: 23392256/23392256 (11422 sectors).
[root hobbes tmp]# mount /dev/hdd
/dev/hdd: Invalid argument
mount: /dev/hdd: can't read superblock
[root hobbes tmp]# mount -t iso9660 /dev/hdd
<a longer error message>

The iso image is correct.
'Twas tested with loopback mounting.

Mike   hennebry web cs ndsu NoDak edu
"There are three kinds of people,
those who can count and those who can't."

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