[Bug 993728] Re: /dev/dvd disappears when a DVD is inserted

[Trent McPheron]

This is still present in Quantal. I can't fix it the same way as you
guys, though... for some reason, the bus info of my dvd drive doesn't
match anything in /dev/disk/by-path.

trent at TiZWorkBox:~$ sudo lshw -C disk
  *-disk                  
       description: ATA Disk
       product: WDC WD2500AAKX-7
       vendor: Western Digital
       physical id: 0.0.0
       bus info: scsi at 0:0.0.0
       logical name: /dev/sda
       version: 19.0
       serial: WD-WMAYW1800352
       size: 232GiB (250GB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 sectorsize=512 signature=03ecac1c
  *-cdrom
       description: DVD-RAM writer
       product: DVD+-RW GH70N
       vendor: HL-DT-ST
       physical id: 0.0.0
       bus info: scsi at 1:0.0.0
       logical name: /dev/sr0
       version: A101
       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
       configuration: ansiversion=5 status=nodisc
  *-disk:0
       description: SCSI Disk
       physical id: 0.0.0
       bus info: scsi at 6:0.0.0
       logical name: /dev/sdb
       configuration: sectorsize=512
  *-disk:1
       description: SCSI Disk
       physical id: 0.0.1
       bus info: scsi at 6:0.0.1
       logical name: /dev/sdc
       configuration: sectorsize=512
  *-disk:2
       description: SCSI Disk
       physical id: 0.0.2
       bus info: scsi at 6:0.0.2
       logical name: /dev/sdd
       configuration: sectorsize=512
  *-disk:3
       description: SCSI Disk
       physical id: 0.0.3
       bus info: scsi at 6:0.0.3
       logical name: /dev/sde
       configuration: sectorsize=512
  *-disk:4
       description: SCSI Disk
       physical id: 0.0.4
       bus info: scsi at 6:0.0.4
       logical name: /dev/sdf
       configuration: sectorsize=512
trent at TiZWorkBox:~$ ls /dev/disk/by-path
pci-0000:00:1a.0-usb-0:1.2.1:1.0-scsi-0:0:0:0
pci-0000:00:1a.0-usb-0:1.2.1:1.0-scsi-0:0:0:1
pci-0000:00:1a.0-usb-0:1.2.1:1.0-scsi-0:0:0:2
pci-0000:00:1a.0-usb-0:1.2.1:1.0-scsi-0:0:0:3
pci-0000:00:1a.0-usb-0:1.2.1:1.0-scsi-0:0:0:4
pci-0000:00:1f.2-scsi-0:0:0:0
pci-0000:00:1f.2-scsi-0:0:0:0-part1
pci-0000:00:1f.2-scsi-0:0:0:0-part2
pci-0000:00:1f.2-scsi-0:0:0:0-part3
pci-0000:00:1f.2-scsi-0:0:0:0-part4

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https://bugs.launchpad.net/bugs/993728

Title:
  /dev/dvd disappears when a DVD is inserted

Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  On a fresh boot, with no DVD inserted:

  $ ls -Al /dev/dvd
  lrwxrwxrwx 1 root root 3 May  2 18:25 /dev/dvd -> sr0

  As soon as I insert a DVD:

  $ ls -l /dev/dvd
  ls: cannot access /dev/dvd: No such file or directory

  The only new lines in dmesg are:

  [   88.411709] UDF-fs: Partition marked readonly; forcing readonly mount
  [   88.472834] UDF-fs: INFO Mounting volume 'WILLIAM_CASTLE_FILM_COLLECTION', timestamp 2009/08/19 19:32 (1e5c)

  This is on a fully updated install of Ubuntu 12.04, with udev
  175-0ubuntu9.

  I don't want /dev/dvd to stop existing exactly when I need to use it.

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