Re: Wrong identification of a USB flash drive.
On Saturday 22 August 2009 16:58:57 Mark Neidorff wrote:
> On Saturday 22 August 2009 10:48 am, Ron Johnson wrote:
> > On 2009-08-22 09:16, Mark Neidorff wrote:
> > > This is in the category of P.A.T. (Petty Annoyances and Tedium) but I
> > > still would like to know why it is happening. That knowledge should
> > > tell me how to fix the problem.
> > >
> > > My system is Lenny 5.02, but the same problem exists on an old Fedora
> > > Core 3 system, so it is not a Debian problem, per se.
> > >
> > > I just bought a 3 pack of Sandisk Cruzers (4Gb). When I insert any of
> > > them into a USB port, the system recognizes it as a CD drive.
> >
> > By "the system", do you mean lines in dmesg, or the icon on your
> > desktop?
> >
> > > Working
> > > around this is easy, but what is causing the system to mis-identify the
> > > Cruzer? The only things on the cruzer are the files that automatically
> > > run under windows ("autorun.inf, LaunchU3.exe" which put a different
> > > way of unounting the device on the screen, and a System subdirectory
> > > and a Documents
> > > subdirectory).
>
> Both on the desktop and in dmesg. Here is the relavent info from dmesg:
>
> Vendor: SanDisk Model: SanDisk Cruzer Rev: 8.02
> Type: Direct-Access ANSI SCSI revision: 00
> SCSI device sdc: 7856127 512-byte hdwr sectors (4022 MB)
> sdc: Write Protect is off
> sdc: Mode Sense: 45 00 00 08
> sdc: assuming drive cache: write through
> SCSI device sdc: 7856127 512-byte hdwr sectors (4022 MB)
> sdc: Write Protect is off
> sdc: Mode Sense: 45 00 00 08
> sdc: assuming drive cache: write through
> sdc: sdc1
> Attached scsi removable disk sdc at scsi14, channel 0, id 0, lun 0
> Vendor: SanDisk Model: SanDisk Cruzer Rev: 8.02
> Type: CD-ROM ANSI SCSI revision: 00
> sr0: scsi3-mmc drive: 48x/48x tray
> Attached scsi CD-ROM sr0 at scsi14, channel 0, id 0, lun 1
> usb-storage: device scan complete
>
> Looks like it is mounted twice?
Another trail to follow,from one time I had a USB dongle to connect to the
internet. Its a long time ago, so pls check everything back before applying:
chmod a+w /dev/ttyUSB2
echo at+zcdrun=8 > /dev/ttyUSB2
Be sure to replace ttyUSB2 by your device.
To get back the CD part of the device, do the same, but replace 8 by 9
Thierry
Reply to: