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Can't mount CD/DVD in Debian testing ("Can't open blockdev"), but it works in Windows 10

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2 answers
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debian mount data-cd
I can't mount any CD or DVD in my drive.  BUT, I have Windows 10 in dual boot, and I can read any CD/DVD in Windows without issues. In this image, "DVD-RW backup" is the DVD-RW label.  Title message in English: **Was not possible to mount DVD-RW backup** (or "Unable to mount", or "Can't mount", etc.). can’t mount - **OS**: Debian GNU/Linux trixie/sid - **Kernel**: 6.12.12-amd64 x86_64 - **Device**: ATAPI iHAS122 W Errors: 
$ sudo mount /dev/sr0 /mnt
mount: /mnt: fsconfig system call failed: /dev/sr0: Can't open blockdev.
       dmesg(1) may have more information after failed mount system call.

$ sudo mount /dev/sr0/pktcdvd0 /mnt
mount: /mnt: fsconfig system call failed: /dev/sr0/pktcdvd0: Can't lookup blockdev.
       dmesg(1) may have more information after failed mount system call.
Here is the output of some commands: 
$ sudo blkid /dev/sr0
/dev/sr0: UUID="67587414000011bf" LABEL="DVD-RW backup" BLOCK_SIZE="2048" TYPE="udf"

$ lsblk
sr0          11:0    1   2,3G  0 rom  
└─pktcdvd0  252:0    1   2,3G  0 disk

$ lsdvd
libdvdread: DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdread: DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
Can't open main ifo!

$ sudo dmesg | grep sr0
[    5.239165] sr 1:0:0:0: [sr0] scsi3-mmc drive: 94x/62x writer dvd-ram cd/rw xa/form2 cdda tray
[    5.297610] sr 1:0:0:0: Attached scsi CD-ROM sr0
[   90.583896] block (null): writer mapped to sr0

$ cdrwtool -i -d /dev/sr0
using device /dev/sr0
256KB internal buffer
setting write speed to 12x

DISC INFO:
	erasable : Yes
	border = 3
	Disc status = 2
	number of first track = 1
	number of sessions = 1
	number of tracks = 1
	status of last track = 1
	uru = 1
	did_v = 0
	dbc_v = 0
	disc type = 0
	disc_id = 0
	lead_in = 00:00:00 (0)
	lead_out = 00:00:00 (0)
	OPC entries = 0

TRACK INFO:

Track 1
	track_number = 1
	session_number = 1
	damage = 0
	copy = 0
	track_mode = 4
	Rt = 0
	blank = 0
	packet = 1
	fp = 1
	data_mode = 1
	lra_v = 0
	nwa_v = 0
	track_start = 0
	next_writable = 0
	last_recorded = 0
	free_blocks = 0
	packet_size = 16
	track_size = 1227456 (2454912KB)
can't unlock door
Here is the output from udevram: 
$ udevadm info -n /dev/sr0                                        
P: /devices/pci0000:00/0000:00:02.1/0000:04:00.1/ata2/host1/target1:0:0/1:0:0:0/block/sr0
M: sr0
R: 0
J: b11:0
U: block
T: disk
D: b 11:0
N: sr0
L: -100
S: disk/by-label/DVD-RW\x20backup
S: disk/by-uuid/67587414000011bf
S: disk/by-id/ata-ATAPI_iHAS122_W_3522540_207325501228
S: disk/by-path/pci-0000:04:00.1-ata-2.0
S: disk/by-path/pci-0000:04:00.1-ata-2
S: disk/by-diskseq/8
S: cdrom
Q: 8
E: DEVPATH=/devices/pci0000:00/0000:00:02.1/0000:04:00.1/ata2/host1/target1:0:0/1:0:0:0/block/sr0
E: DEVNAME=/dev/sr0
E: DEVTYPE=disk
E: DISKSEQ=8
E: MAJOR=11
E: MINOR=0
E: SUBSYSTEM=block
E: USEC_INITIALIZED=5297510
E: ID_CDROM=1
E: SYSTEMD_MOUNT_DEVICE_BOUND=1
E: ID_CDROM_CD_R=1
E: ID_CDROM_CD_RW=1
E: ID_CDROM_DVD=1
P: /devices/pci0000:00/0000:00:02.1/0000:04:00.1/ata2/host1/target1:0:0/1:0:0:0/block/sr0
M: sr0
R: 0
J: b11:0
U: block
T: disk
D: b 11:0
N: sr0
L: -100
S: disk/by-label/DVD-RW\x20backup
S: disk/by-uuid/67587414000011bf
S: disk/by-id/ata-ATAPI_iHAS122_W_3522540_207325501228
S: disk/by-path/pci-0000:04:00.1-ata-2.0
S: disk/by-path/pci-0000:04:00.1-ata-2
S: disk/by-diskseq/8
S: cdrom
Q: 8
E: DEVPATH=/devices/pci0000:00/0000:00:02.1/0000:04:00.1/ata2/host1/target1:0:0/1:0:0:0/block/sr0
E: DEVNAME=/dev/sr0
E: DEVTYPE=disk
E: DISKSEQ=8
E: MAJOR=11
E: MINOR=0
E: SUBSYSTEM=block
E: USEC_INITIALIZED=5297510
E: ID_CDROM=1
E: SYSTEMD_MOUNT_DEVICE_BOUND=1
E: ID_CDROM_CD_R=1
E: ID_CDROM_CD_RW=1
E: ID_CDROM_DVD=1
E: ID_CDROM_DVD_R=1
E: ID_CDROM_DVD_RAM=1
E: ID_CDROM_MRW=1
E: ID_CDROM_MRW_W=1
E: ID_CDROM_DVD_PLUS_R_DL=1
E: ID_CDROM_DVD_PLUS_R=1
E: ID_CDROM_DVD_PLUS_RW=1
E: ID_CDROM_DVD_R_DL_JR=1
E: ID_CDROM_DVD_R_DL_SEQ=1
E: ID_CDROM_DVD_RW_SEQ=1
E: ID_CDROM_DVD_RW_RO=1
E: ID_CDROM_CD=1
E: ID_CDROM_RW_REMOVABLE=1
E: ID_CDROM_DVD_RW=1
E: ID_CDROM_DVD_R_DL=1
E: ID_CDROM_MEDIA=1
E: ID_CDROM_MEDIA_DVD_RW_RO=1
E: ID_CDROM_MEDIA_DVD_RW=1
E: ID_CDROM_MEDIA_STATE=complete
E: ID_CDROM_MEDIA_SESSION_COUNT=1
E: ID_CDROM_MEDIA_TRACK_COUNT=1
E: ID_CDROM_MEDIA_TRACK_COUNT_DATA=1
E: ID_ATA=1
E: ID_TYPE=cd
E: ID_BUS=ata
E: ID_MODEL=ATAPI_iHAS122_W
E: ID_MODEL_ENC=ATAPI\x20\x20\x20iHAS122\x20\x20\x20W\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20
E: ID_REVISION=PL06
E: ID_SERIAL=ATAPI_iHAS122_W_3522540_207325501228
E: ID_SERIAL_SHORT=3522540_207325501228
E: ID_ATA_FEATURE_SET_PM=1
E: ID_ATA_FEATURE_SET_PM_ENABLED=1
E: ID_ATA_SATA=1
E: ID_ATA_SATA_SIGNAL_RATE_GEN1=1
E: ID_ATA_PERIPHERAL_DEVICE_TYPE=5
E: ID_PATH=pci-0000:04:00.1-ata-2.0
E: ID_PATH_TAG=pci-0000_04_00_1-ata-2_0
E: ID_PATH_ATA_COMPAT=pci-0000:04:00.1-ata-2
E: ID_FS_VOLUME_ID=DVD-RW\x20backup
E: ID_FS_UUID=67587414000011bf
E: ID_FS_UUID_ENC=67587414000011bf
E: ID_FS_VOLUME_SET_ID=67587414000011BF
E: ID_FS_APPLICATION_ID=genisoimage
E: ID_FS_LABEL=DVD-RW_backup
E: ID_FS_LABEL_ENC=DVD-RW\x20backup
E: ID_FS_LOGICAL_VOLUME_ID=DVD-RW\x20backup
E: ID_FS_VERSION=1.02
E: ID_FS_BLOCKSIZE=2048
E: ID_FS_TYPE=udf
E: ID_FS_USAGE=filesystem
E: ID_FOR_SEAT=block-pci-0000_04_00_1-ata-2_0
E: DEVLINKS=/dev/disk/by-label/DVD-RW\x20backup /dev/disk/by-uuid/67587414000011bf /dev/disk/by-id/ata-ATAPI_iHAS122_W_3522540_207325501228 /dev/disk/by-path/pci-0000:04:00.1-ata-2.0 /dev/disk/by-path/pci-0000:>
E: TAGS=:systemd:uaccess:seat:
E: CURRENT_TAGS=:systemd:uaccess:seat:

EDITION of February 15, 2025

The problem seems to be with RW media. Recently it started working again: I was able to read a commercial CD from a German course, a movie recorded on DVD-R, an audio CD bought from a store, etc. But when I insert a CD or DVD-RW, the dreaded pktcdvd0 appears. I did a test, I burned an ISO to DVD-RW using growisofs. It worked, it burned without problems. However, right after burning, it did not eject the DVD automatically, and it was unable to read the burned DVD, showing the same error reported above. I was unable to read any other media: audio CD, German course, etc. The command eject /dev/sr0 did not work, but the drive eject button always works. I had to reset the PC and then I was able to read the other media. 
$ sudo cat /sys/kernel/debug/pktcdvd/pktcdvd0/info   
Writer pktcdvd0 mapped to sr0:

Settings:
	packet size:		0kB
	write type:		Packet
	packet type:		Variable
	link loss:		0
	track mode:		0
	block mode:		Unknown

Statistics:
	packets started:	0
	packets ended:		0
	written:		0kB
	read gather:		0kB
	read:			0kB

Misc:
	reference count:	2
	flags:			0x0
	read speed:		0kB/s
	write speed:		0kB/s
	start offset:		0
	mode page offset:	0

Queue state:
	bios queued:		0
	bios pending:		0
	current sector:		0x0
	state:			i:0 ow:0 rw:0 ww:0 rec:0 fin:0
	write congestion marks:	off=9000 on=10000
Also, when a CD/DVD-RW is inserted, pktcdvd0 never disappears (even after midia ejection). I need to restart the PC if I want to use the CD Burner again. In this example, DVD-RW was already ejected: 
$ lsblk
sr0          11:0    1   2,3G  0 rom  
└─pktcdvd0  252:0    1   2,3G  0 disk

$ sudo pktsetup -s      
 0 : 252:0 -> 11:0

$ sudo pktsetup -d 252:0                         
pktsetup: Error: Can't tear down packet device '252:0': Device or resource busy

EDITION of February 16, 2025

Found the same issue: - Linux Mint Forum: Issues with DVD+RW not ejecting or mounting - Linux.org: Unable to mount or eject DVD+RW
Asked by Daniel (432 rep)
Feb 14, 2025, 06:12 PM
Last activity: Feb 17, 2025, 07:27 PM
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