external (enclosure) ide box usb 2 and firewire dvd and cd writer
 

hi, i had a brief look on how to mount a dvd writer which is in an external enxclosure box. but no luck so far. firslty the data.

::i am running FC2 kernel 2.6.5.1.358
::the external ide enclosure box is the microsol with usb2 and firewire ports.
for now it is connected through usb2 in 4 port usb hub. there is also a mouse connected there but thats about it. the hub is connected on a usb2 pcmcia card. all these shouldnt really be a problem as the other peripherals work fine.
::dvd drive: nec nd 3500a

you will find also below my dmesg output.

when i connect the drive on bootup the following line is added in the fstab file

/dev/cdrom1 /mnt/cdrom1 udf,iso9660 noauto,owner,kudzu,ro 0 0

when try to mount cdrom1 i am getting error

mount: wrong fs type, bad option, bad superblock on /dev/cdrom1,
or too many mounted file systems

however, i think that it should be smth like /dev/sda /mnt/cdrom1. i ve tried it but no luck. error message is about cant read superblock.
and not to mention that i need to have write access too in order to burn cds and dvds. but i think that i will need more things for writing dvds.

anyway, my question what "should" be the fstab mount line???

here is the dmesg output (this one is when drive is already connected during bootup)

Vendor: _NEC Model: DVD_RW ND-3500AG Rev: 2.16
Type: CD-ROM ANSI SCSI revision: 02
USB Mass Storage device found at 3
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
sr0: scsi3-mmc drive: 48x/48x writer cd/rw xa/form2 cdda tray
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
lp: driver loaded but no devices found
inserting floppy driver for 2.6.5-1.358
floppy0: Unable to grab IRQ6 for the floppy driver
agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0.
agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode
agpgart: Putting AGP V2 device at 0000:01:00.0 into 4x mode
agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0.
agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode
agpgart: Putting AGP V2 device at 0000:01:00.0 into 4x mode
PCI: Enabling device 0000:00:1f.5 (0000 -> 0001)
PCI: Setting latency timer of device 0000:00:1f.5 to 64
MC'97 1 converters and GPIO not ready (0xf200)
intel8x0_measure_ac97_clock: measured 49478 usecs
intel8x0: clocking to 48000
usb 1-1.2: new full speed USB device using address 4
scsi1 : SCSI emulation for USB Mass Storage devices
Vendor: Model: Rev:
Type: Direct-Access ANSI SCSI revision: 02
inserting floppy driver for 2.6.5-1.358
floppy0: Unable to grab IRQ6 for the floppy driver
SCSI device sda: 117266689 512-byte hdwr sectors (60041 MB)
sda: assuming drive cache: write through
sda:SCSI error : <1 0 0 0> return code = 0x6000000
end_request: I/O error, dev sda, sector 117266688
Buffer I/O error on device sda, logical block 117266688
udf: registering filesystem
UDF-fs DEBUG fs/udf/lowlevel.c:57:udf_get_last_session: XA disk: no, vol_desc_start=0
UDF-fs DEBUG fs/udf/super.c:1552:udf_fill_super: Multi-session=0
UDF-fs DEBUG fs/udf/super.c:540:udf_vrs: Starting at sector 16 (2048 byte sectors)
end_request: I/O error, dev sr0, sector 64
UDF-fs DEBUG fs/udf/super.c:1288:udf_check_valid: Failed to read byte 32768. Assuming open disc. Skipping validity check
end_request: I/O error, dev sr0, sector 697176
end_request: I/O error, dev sr0, sector 696152
end_request: I/O error, dev sr0, sector 695928
end_request: I/O error, dev sr0, sector 697168
end_request: I/O error, dev sr0, sector 696144
end_request: I/O error, dev sr0, sector 695920
end_request: I/O error, dev sr0, sector 696576
end_request: I/O error, dev sr0, sector 695552
end_request: I/O error, dev sr0, sector 695328
end_request: I/O error, dev sr0, sector 696568
end_request: I/O error, dev sr0, sector 695544
end_request: I/O error, dev sr0, sector 695320
end_request: I/O error, dev sr0, sector 572044
end_request: I/O error, dev sr0, sector 571020
end_request: I/O error, dev sr0, sector 570796
end_request: I/O error, dev sr0, sector 572036
end_request: I/O error, dev sr0, sector 571012
end_request: I/O error, dev sr0, sector 570788
end_request: I/O error, dev sr0, sector 571444
end_request: I/O error, dev sr0, sector 570420
end_request: I/O error, dev sr0, sector 570196
end_request: I/O error, dev sr0, sector 571436
end_request: I/O error, dev sr0, sector 570412
end_request: I/O error, dev sr0, sector 570188
end_request: I/O error, dev sr0, sector 1248
end_request: I/O error, dev sr0, sector 1024
UDF-fs DEBUG fs/udf/misc.c:225:udf_read_tagged: block=256, location=256: read failed
UDF-fs DEBUG fs/udf/super.c:1342:udf_load_partition: No Anchor block found
UDF-fs: No partition found (1)
end_request: I/O error, dev sr0, sector 64
isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
SCSI error : <1 0 0 0> return code = 0x6000000
end_request: I/O error, dev sda, sector 117266688
Buffer I/O error on device sda, logical block 117266688
sda1 sda2
Attached scsi disk sda at scsi1, channel 0, id 0, lun 0
USB Mass Storage device found at 4
usb 4-1.3: new low speed USB device using address 4
input: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000:07:00.2-1.3
usb 4-1.3: USB disconnect, address 4
inserting floppy driver for 2.6.5-1.358
floppy0: Unable to grab IRQ6 for the floppy driver
usb 4-1.4: new low speed USB device using address 5
input: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000:07:00.2-1.4
spurious 8259A interrupt: IRQ7.
IN=eth0 OUT= MAC=00:00:39:81:d0:e3:00:e0:18:da:58:0b:08:00 SRC=192.168.0.2 DST=192.168.0.6 LEN=48 TOS=0x00 PREC=0x00 TTL=128 ID=26360 DF PROTO=TCP SPT=2327 DPT=80 WINDOW=16384 RES=0x00 SYN URGP=0
IN=eth0 OUT= MAC=00:00:39:81:d0:e3:00:e0:18:da:58:0b:08:00 SRC=192.168.0.2 DST=192.168.0.6 LEN=48 TOS=0x00 PREC=0x00 TTL=128 ID=26426 DF PROTO=TCP SPT=2327 DPT=80 WINDOW=16384 RES=0x00 SYN URGP=0
IN=eth0 OUT= MAC=00:00:39:81:d0:e3:00:e0:18:da:58:0b:08:00 SRC=192.168.0.2 DST=192.168.0.6 LEN=48 TOS=0x00 PREC=0x00 TTL=128 ID=26579 DF PROTO=TCP SPT=2327 DPT=80 WINDOW=16384 RES=0x00 SYN URGP=0
end_request: I/O error, dev sr0, sector 64
isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
Buffer I/O error on device sr0, logical block 2
Buffer I/O error on device sr0, logical block 3
Buffer I/O error on device sr0, logical block 4
Buffer I/O error on device sr0, logical block 5
Buffer I/O error on device sr0, logical block 6
Buffer I/O error on device sr0, logical block 7
Buffer I/O error on device sr0, logical block 8
Buffer I/O error on device sr0, logical block 9
Buffer I/O error on device sr0, logical block 10
Buffer I/O error on device sr0, logical block 11
Buffer I/O error on device sr0, logical block 12
Buffer I/O error on device sr0, logical block 13
Buffer I/O error on device sr0, logical block 14
Buffer I/O error on device sr0, logical block 15
Buffer I/O error on device sr0, logical block 16
Buffer I/O error on device sr0, logical block 17
Buffer I/O error on device sr0, logical block 18
Buffer I/O error on device sr0, logical block 19
Buffer I/O error on device sr0, logical block 20
Buffer I/O error on device sr0, logical block 21
Buffer I/O error on device sr0, logical block 22
Buffer I/O error on device sr0, logical block 23
Buffer I/O error on device sr0, logical block 24
Buffer I/O error on device sr0, logical block 25
Buffer I/O error on device sr0, logical block 26
Buffer I/O error on device sr0, logical block 27
Buffer I/O error on device sr0, logical block 28
Buffer I/O error on device sr0, logical block 29
Buffer I/O error on device sr0, logical block 30
Buffer I/O error on device sr0, logical block 31
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 64
Buffer I/O error on device sr0, logical block 16
Buffer I/O error on device sr0, logical block 17
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
Buffer I/O error on device sr0, logical block 2
Buffer I/O error on device sr0, logical block 3
Buffer I/O error on device sr0, logical block 4
Buffer I/O error on device sr0, logical block 5
Buffer I/O error on device sr0, logical block 6
Buffer I/O error on device sr0, logical block 7
Buffer I/O error on device sr0, logical block 8
Buffer I/O error on device sr0, logical block 9
Buffer I/O error on device sr0, logical block 10
Buffer I/O error on device sr0, logical block 11
Buffer I/O error on device sr0, logical block 12
Buffer I/O error on device sr0, logical block 13
Buffer I/O error on device sr0, logical block 14
Buffer I/O error on device sr0, logical block 15
Buffer I/O error on device sr0, logical block 16
Buffer I/O error on device sr0, logical block 17
Buffer I/O error on device sr0, logical block 18
Buffer I/O error on device sr0, logical block 19
Buffer I/O error on device sr0, logical block 20
Buffer I/O error on device sr0, logical block 21
Buffer I/O error on device sr0, logical block 22
Buffer I/O error on device sr0, logical block 23
Buffer I/O error on device sr0, logical block 24
Buffer I/O error on device sr0, logical block 25
Buffer I/O error on device sr0, logical block 26
Buffer I/O error on device sr0, logical block 27
Buffer I/O error on device sr0, logical block 28
Buffer I/O error on device sr0, logical block 29
Buffer I/O error on device sr0, logical block 30
Buffer I/O error on device sr0, logical block 31
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 64
Buffer I/O error on device sr0, logical block 16
Buffer I/O error on device sr0, logical block 17
end_request: I/O error, dev sr0, sector 0
FAT: unable to read boot sector
end_request: I/O error, dev sr0, sector 64
isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
end_request: I/O error, dev sr0, sector 0
FAT: unable to read boot sector
UDF-fs DEBUG fs/udf/lowlevel.c:57:udf_get_last_session: XA disk: no, vol_desc_start=0
UDF-fs DEBUG fs/udf/super.c:1552:udf_fill_super: Multi-session=0
UDF-fs DEBUG fs/udf/super.c:540:udf_vrs: Starting at sector 16 (2048 byte sectors)
end_request: I/O error, dev sr0, sector 64
UDF-fs DEBUG fs/udf/super.c:1288:udf_check_valid: Failed to read byte 32768. Assuming open disc. Skipping validity check
end_request: I/O error, dev sr0, sector 697176
end_request: I/O error, dev sr0, sector 696152
end_request: I/O error, dev sr0, sector 695928
end_request: I/O error, dev sr0, sector 697168
end_request: I/O error, dev sr0, sector 696144
end_request: I/O error, dev sr0, sector 695920
end_request: I/O error, dev sr0, sector 696576
end_request: I/O error, dev sr0, sector 695552
end_request: I/O error, dev sr0, sector 695328
end_request: I/O error, dev sr0, sector 696568
end_request: I/O error, dev sr0, sector 695544
end_request: I/O error, dev sr0, sector 695320
end_request: I/O error, dev sr0, sector 572044
end_request: I/O error, dev sr0, sector 571020
end_request: I/O error, dev sr0, sector 570796
end_request: I/O error, dev sr0, sector 572036
end_request: I/O error, dev sr0, sector 571012
end_request: I/O error, dev sr0, sector 570788
end_request: I/O error, dev sr0, sector 571444
end_request: I/O error, dev sr0, sector 570420
end_request: I/O error, dev sr0, sector 570196
end_request: I/O error, dev sr0, sector 571436
end_request: I/O error, dev sr0, sector 570412
end_request: I/O error, dev sr0, sector 570188
end_request: I/O error, dev sr0, sector 1248
end_request: I/O error, dev sr0, sector 1024
UDF-fs DEBUG fs/udf/misc.c:225:udf_read_tagged: block=256, location=256: read failed
UDF-fs DEBUG fs/udf/super.c:1342:udf_load_partition: No Anchor block found
UDF-fs: No partition found (1)
end_request: I/O error, dev sr0, sector 64
isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
end_request: I/O error, dev sr0, sector 0
FAT: unable to read boot sector
UDF-fs DEBUG fs/udf/lowlevel.c:57:udf_get_last_session: XA disk: no, vol_desc_start=0
UDF-fs DEBUG fs/udf/super.c:1552:udf_fill_super: Multi-session=0
UDF-fs DEBUG fs/udf/super.c:540:udf_vrs: Starting at sector 16 (2048 byte sectors)
end_request: I/O error, dev sr0, sector 64
UDF-fs DEBUG fs/udf/super.c:1288:udf_check_valid: Failed to read byte 32768. Assuming open disc. Skipping validity check
end_request: I/O error, dev sr0, sector 697176
end_request: I/O error, dev sr0, sector 696152
end_request: I/O error, dev sr0, sector 695928
end_request: I/O error, dev sr0, sector 697168
end_request: I/O error, dev sr0, sector 696144
end_request: I/O error, dev sr0, sector 695920
end_request: I/O error, dev sr0, sector 696576
end_request: I/O error, dev sr0, sector 695552
end_request: I/O error, dev sr0, sector 695328
end_request: I/O error, dev sr0, sector 696568
end_request: I/O error, dev sr0, sector 695544
end_request: I/O error, dev sr0, sector 695320
end_request: I/O error, dev sr0, sector 572044
end_request: I/O error, dev sr0, sector 571020
end_request: I/O error, dev sr0, sector 570796
end_request: I/O error, dev sr0, sector 572036
end_request: I/O error, dev sr0, sector 571012
end_request: I/O error, dev sr0, sector 570788
end_request: I/O error, dev sr0, sector 571444
end_request: I/O error, dev sr0, sector 570420
end_request: I/O error, dev sr0, sector 570196
end_request: I/O error, dev sr0, sector 571436
end_request: I/O error, dev sr0, sector 570412
end_request: I/O error, dev sr0, sector 570188
end_request: I/O error, dev sr0, sector 1248
end_request: I/O error, dev sr0, sector 1024
UDF-fs DEBUG fs/udf/misc.c:225:udf_read_tagged: block=256, location=256: read failed
UDF-fs DEBUG fs/udf/super.c:1342:udf_load_partition: No Anchor block found
UDF-fs: No partition found (1)
end_request: I/O error, dev sr0, sector 64
isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16


thanks

sda is for hard disks not CDROM drives. sd really means SCSI disk but usb uses SCSI emulation. The /dev/cdrom1 is probably a link to the actual DVD device ID. To verify type in a console window:
ls -l /dev/cdrom1. From the output of dmesg it looks like the DVD drive is /dev/sr0.

What type of disk are you trying to mount. dmesg shows a bunch of errors. The errors reference UDF which is a DirectCD or InCD formated CD.

I also see a sda error. I do not have any first had experience with this type of device so not sure on the cure.

You can try mounting the drive manaully to see what happens
mount -t iso9660 /dev/sr0 /mnt/cdrom1

firstly thanks for your help as you made me think a bit... the dvd writer had an audio cd which i was trying to mount.... which is not possible.... furthremore, even if the dvd seems to be the sr0 device.... there is no such device on my /dev..... however i read some threads that people have moutned a dvd under sr0. so it appears to be in my case that the correct device is the cdwriter one.... and there is no problem mounting it with a data cd..... in read only mode though.... so how am i supposed to burn cds and dvds? well thats another thread-story. for music "mounting" here is a thread that i found useful to solve the problem....
http://www.fedoraforum.org/forum/showthread.php?t=23287

thanks again...