Date: Sun, 7 Jan 2007 22:56:40 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: "Michael M. Press" <deathjestr@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: USB drive is a CDROM drive and is not writable Message-ID: <20070108045640.GB41724@dan.emsphone.com> In-Reply-To: <44b564930701071948n4defad59u142b8b6c3d4650f8@mail.gmail.com> References: <44b564930701071948n4defad59u142b8b6c3d4650f8@mail.gmail.com>
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In the last episode (Jan 07), Michael M. Press said: > I have a 2 gigabyte USB memory stick from made by PNY. When I plug it > in, I get the following: > > umass0: vendor 0x0930 USB Flash Memory, rev 2.00/2.00, addr 2 > da0 at umass-sim0 bus 0 target 0 lun 0 > da0: < USB Flash Memory 6.50> Removable Direct Access SCSI-0 device > da0: 40.000MB/s transfers > da0: 1901MB (3894975 512 byte sectors: 255H 63S/T 242C) > cd1 at umass-sim0 bus 0 target 0 lun 1 > cd1: < USB Flash Memory 6.50> Removable CD-ROM SCSI-0 device > cd1: 40.000MB/s transfers > cd1: Attempt to query device size failed: NOT READY, Medium not present > > I want to be able to mount the device read-write, so I use the > following command: > > mount -t cd9660 -o rw /dev/cd1 /media/flashdrv > > The command runs without spitting any errors at me, but it does a > read-only mount. I can see files on the drive, but (of course) I > can't change them. Does my problem have anything to do with the > device being detected as a CD-ROM drive? If that is what's wrong I > don't really know where to start looking to fix it. Any ideas? Very interesting! cd1 and da0 look like the same device, with cd1 just on LUN 1. I bet if you were to examine /dev/da0 you'd see the real writable FAT filesystem there. I wonder if it is doing fat->cd9660 filesystem emulation on the fly? -- Dan Nelson dnelson@allantgroup.com
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