A liitle Problem writing to an external DVD drive

wearetheborg · 12-03-2004, 06:13 PM

I got an internal dvd drive, put it in an external USB enclosure, SUSE 9.1 pro recognised it, reads fine, but when I try to write it using k3b I get the error:
unable to open64("/dev/sr0",O_RDONLY): Permission denied

I also have an inbuilt cdrw which works fine, here are the permissions:
brw------- 1 root disk 11, 0 2004-04-06 06:27 sr0 (dvd drive)
brw------- 1 wearetheborg disk 22, 0 2004-04-06 06:27 hdc

I tried opening the permission(chmod 666 sr0) but then k3b gives another error :
/dev/sr0: unable to proceed with recording: unable to unmount

any help?

Oh, and how do I know if I have a USB2.0 port or USB 1.1? I assumed it woulb be USB 2.0, but now I'm not sure.

wearetheborg · 12-03-2004, 06:18 PM

I did chown to me, but then I got:
/media/usb-storage-DEF108A58F41:0:0:0 is not in the fstab (and you are n
ot root)
:-( /dev/sr0: unable to proceed with recording: unable to unmount

Electro · 12-03-2004, 11:23 PM

Type "cat /proc/bus/usb/devices". If SPD is greater than 12 than its USB 2.0. This is the same as using /sbin/lsusb.

Make sure you are not running k3b while you are in the DVD or CD-ROM directory. Make sure /dev/sda is also set at 666. Also make sure you part of the disk, cdrom or whatever group that it says.

Using USB for a DVD-RW drive is just asking for trouble. I suggest internal DVD-RW drives because they have a lot lower latency than USB and Firewire.

wearetheborg · 12-04-2004, 12:11 AM

Anything I should add to fstab?

Its a notebook, hence the external drive.

wearetheborg · 12-04-2004, 03:17 AM

lsusb gave me:
linux:/etc/rc.d # lsusb
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 006: ID 04b4:6830 Cypress Semiconductor Corp.
Bus 002 Device 003: ID 045e:007d Microsoft Corp.
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000

the Cypress one is the external drive. Is it USB 2.0?

erick.guedes · 06-12-2008, 11:50 AM

error when i try to burn a DVD on a external DVD writer on usb:
Erro que aparecia quando tentava gravar um dvd no meu gravador de dvd externo pela usb.

:-( unable to open64("/dev/sr0",O_RDONLY): Permission denied

i solved doing this:
Eu resolvi fazendo isso:

bluewings:/home/eguedes# cat /proc/bus/usb/devices

T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 8
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.24-1-486 ehci_hcd
S: Product=EHCI Host Controller
S: SerialNumber=0000:00:0b.1
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms

T: Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=04b4 ProdID=6830 Rev= 0.01
S: Manufacturer=Cypress Semiconductor
S: Product=USB2.0 Storage Device
S: SerialNumber=DEF107679C83
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 8
B: Alloc= 11/900 us ( 1%), #Int= 1, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.24-1-486 ohci_hcd
S: Product=OHCI Host Controller
S: SerialNumber=0000:00:0b.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms

T: Bus=01 Lev=01 Prnt=01 Port=05 Cnt=01 Dev#= 2 Spd=1.5 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=05e3 ProdID=1205 Rev= 1.00
S: Product=USB Mouse
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=10ms

Code:

*Como vocês podem ver onde esta sublinhado meu controlador usb é 2.0 (OHCI Host Controller ... Spd=12) 
e meu drive de DVD externo usb é 2.0 ( USB2.0 Storage Device ) 
e foi reconhecido como tal ( Spd=480 )

*How you can see (where is underlined) my usb conroller is 2.0 (OHCI Host Controller ... Spd=12) 
and my DVD external usb is 2.0 ( USB2.0 Storage Device ) 
and was recognized like that ( Spd=480 )

bluewings:/home/eguedes# ls -la /dev/sr*
lrwxrwxrwx 1 root root 4 Jun 12 11:03 /dev/sr0 -> scd0
bluewings:/home/eguedes# ls -la /dev/cdrom*
lrwxrwxrwx 1 root root 3 Jun 12 10:58 /dev/cdrom -> hda
lrwxrwxrwx 1 root root 4 Jun 12 11:03 /dev/cdrom1 -> scd0
lrwxrwxrwx 1 root root 4 Jun 12 11:03 /dev/cdrom2 -> scd0
bluewings:/home/eguedes# ls -la /dev/scd0
brw-rw---- 1 root cdrom 11, 0 Jun 12 11:03 /dev/scd0

Code:

Vendo as permissões do equipamento
watching the permissions of the equipment

bluewings:/home/eguedes# chmod 666 /dev/scd0

Code:

Alterando a permissão / changing the permissions

bluewings:/home/eguedes# ls -la /dev/scd0
brw-rw-rw- 1 root cdrom 11, 0 Jun 12 11:03 /dev/scd0

Code:

a nova permissão / the new permission

apos isso gravou normal / after that burns ok.