Gerrit:
I also have an HP USB CD-Writer Plus, 8200 series (207 version) and am
getting
pretty much the same results as Alain. My questions to you are 1 - the unit you
had
mounted and reading was it a type 107 or 207? and 2 - do you remember what
kernel version you were testing with. My current results are with pre7-6.
Of interest is that the failure which while not absolutely identical is very
similar to what I see
using an Iomega usb-scsi Jaz bridge. I smells like shuttle is manufacturing
special
OEM versions of there bridge chips with customer (microsoft?) requested changes
in the usb interface. The HP which I opened up is definitely a shuttle usb - ide
ATAPI
single device which reports itself as "HP Mesa". While I haven't pried open the
Iomega unit I strongly suspect that it is a shuttle chip reporting itself as an
"Iomega
usb-scsi bridge"
Blisster
Gerrit Hiddink wrote:
> > 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?
>
> > the 2.3.99-pre7-9 kernel, and noticed that some *other* model of CD-Writer
> > Plus is supported (vendor=0x3f0, product=0x107, ). However, ours is
> > 0x3f0/0x107/1. So, we supposed that both drives were similar enough,
> > and just duplicated the relevant description line:
> >
> > { 0x03f0, 0x0207, 0x0001,
> > "HP USB CD-Writer Plus", US_SC_8070, US_PR_CB, 0},>
>
> > Alas, it didn't work either, the dmesg output is at the end of this mail.
> > The device did show up in /proc/scsi/usb-storage/0, but could not be
> > mounted. Any ideas?
>
> 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.
>
> 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?
>
> Grit
>
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