>> A colleague of mine has an HP USB CD-Writer Plus, 8200 series, and we
>> attempted to get it to work under Linux, but to no avail. We tried it with
>What error message do you get? Does it fail immediately with an
>"/dev/scd0 has wrong major or minor number", or does mount fail
>to read data?
Yes, indeed. It fails right away with
"/dev/scd0 has wrong major or minor number"
>My HP USB CD-Writer Plus (model 8210e) at first had similar symptoms.
>Matt Dharm suggested to change the unusual_devices entry: change it
>into
>{ 0x03f0, 0x0207, 0x0001,
> "HP USB CD-Writer Plus", US_SC_8070, US_PR_CB, US_FL_SINGLE_LUN}
>which worked (for me). Also, make sure you have SCSI CDROM support compiled
>into the kernel. I loaded sr_mod, scsi_mod and cdrom (as well as the USB
>modules of course) and then it worked. Reading, that is. Haven't tried
>writing CD's yet.
I don't have SCSI CDROM compiled into the kernel, but tried to load it as
module. Does this really make a difference? If so, I can try to recompile
the kernel...
>Eventually you should get a message that says:
>scsi0 : SCSI emulation for USB Mass Storage devices
>scsi : 1 host.
>(as you did)
>detected scsi CD-ROM sr0 at ascsi0, channel 0, id 0, lun 0
>sr0: scsi3-mmc drive: 1x/163x xa/form2 caddy
>I'm not sure if the information in the last line is sufficiently accurate,
>but at least it reads data. You should find the sr0 device in /proc/devices.
>> usb-storage.c: *** thread awakened.
>> usb-storage.c: Command TEST_UNIT_READY (6 bytes)
>> usb-storage.c: 00 00 00 00 00 00 13 c0 e0 e1
>> usb_control/bulk_msg: timeout
>do you find TEST_UNIT_READY commands that do not timeout in your logfile?
No other TEST_UNIT_READY data in the logfile.
>Grit
Here is some more data:
Output of cat /proc/scsi/usb-storage/0 :
> cat scsi-id
Host scsi0: usb-storage
Vendor: Hewlett Packard
Product: HP Mesa
Serial Number: None
Protocol: 8070i
Transport: Control/Bulk
GUID: 03f002070000000000000000
Contents of /proc/bus/usb/dev:
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 0.00
S: Product=USB UHCI Root Hub
S: SerialNumber=fce0
C:* #Ifs= 1 Cfg#= 1 Atr=40 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= 8 Ivl=255ms
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1
P: Vendor=03f0 ProdID=0207 Rev= 0.01
S: Manufacturer=Hewlett Packard
S: Product=HP Mesa
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=ff Driver=usb-storage
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl= 5ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
Thanks,
Alain
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