[gentoo-amd64] Confused by cdrecord

["Daiajo Tibdixious" <daiajo@gmail.com>]

I did
$ mkisofs -o FILE.iso -V "LABEL" -U -iso-level 4 -publisher "ME" -r DIRECTORY
       :
Total translation table size: 0
Total rockridge attributes bytes: 1894
Total directory bytes: 0
Path table size(bytes): 10
Max brk space used 21000
2144493 extents written (4188 MB)

where uppercase was my actual values. This bit looks okay.

I then burned it so DVD with
$ cdrecord-ProDVD -dev=/dev/cdrw -sao FILE.iso
Cdrecord-ProDVD-Clone 2.01.01b03 (i686-pc-linux-gnu) Copyright (C)
1995-2006 Jörg Schilling
Unlocked features: ProDVD Clone
Limited  features:
This copy of cdrecord is licensed for:
private/research/educational_non-commercial_use
cdrecord-ProDVD: Warning: Running on Linux-2.6.15-gentoo-r7
cdrecord-ProDVD: There are unsettled issues with Linux-2.5 and newer.
cdrecord-ProDVD: If you have unexpected problems, please try Linux-2.4
or Solaris.
scsidev: '/dev/cdrw'
devname: '/dev/cdrw'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : 'PIONEER '
Identifikation : 'DVD-RW  DVR-109 '
Revision       : '1.09'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Using generic SCSI-3/mmc-2 DVD-R/DVD-RW driver (mmc_dvd).
Driver flags   : DVD MMC-3 SWABAUDIO BURNFREE
Supported modes: PACKET SAO
Starting to write CD/DVD at speed 8 in real SAO mode for single session.
Last chance to quit, starting real write    0 seconds. Operation starts.
Track 01: Total bytes read/written: 4391921664/4391921664 (2144493 sectors).

which also looks okay.

I physically moved the disk from my burner to my DVD ROM drive.
I wonder why I can't now mount it?
$ mount -t iso9660 /dev/cdrom1 /mnt/dvdrom
mount: block device /dev/cdrom1 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/cdrom1,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

$ dmesg|tail
hdd: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
ide: failed opcode was: unknown
end_request: I/O error, dev hdd, sector 0
SQUASHFS error: sb_bread failed reading block 0x0
SQUASHFS error: unable to read superblock
hdd: command error: status=0x51 { DriveReady SeekComplete Error }
hdd: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
ide: failed opcode was: unknown
end_request: I/O error, dev hdd, sector 64
isofs_fill_super: bread failed, dev=hdd, iso_blknum=16, block=16

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