removable usb media don't present devices to mount

Rem P Roberti remegius at comcast.net
Thu Oct 20 13:29:54 PDT 2005


Ryan Zeigler wrote:

>I'm using FreeBSD 6.0-rc1, and I'm having trouble with removable usb memory 
>drives.  I plug the device in, and get this from dmesg:
>
>umass0: LEXAR MEDIA JUMPDRIVE2, rev 2.00/1.25, addr 2
>
>There is no mention at all of /dev/da0, which is, as I understand it, the 
>device that is traditionally presented to mount.  usbdevs sees the device, 
>and gives this output.
>
>port 8 addr 2: high speed, power 70 mA, config 1, JUMPDRIVE2(0xa300), LEXAR 
>MEDIA(0x05dc), rev 1.25
>
>This occurs both with GENERIC kernels, and a custom kernel that I configured.  
>The custom configuration is listed here:
>http://www.dickinson.edu/~zeiglerr/STRMKERNEL
>
>Other things of interest.  At random intervals, unplugging the device and 
>replugging it gives me this out of dmesg:
>
>umass0: LEXAR MEDIA JUMPDRIVE2, rev 2.00/1.25, addr 2
>da0 at umass-sim0 bus 0 target 0 lun 0
>da0: <Generic STORAGE DEVICE 1.25> Removable Direct Access SCSI-0 device
>da0: 40.000MB/s transfers
>da0: 250MB (512000 512 byte sectors: 64H 32S/T 250C)
>(da0:umass-sim0:0:0:0): Synchronize cache failed, status == 0x10, scsi status 
>== 0x0
>
>However, the mount command hangs in this case (I left it, and came back an 
>hour later and it hadn't mounted).
>
>The USB drive works, as it is autodetected and mounted by Mac's and various 
>other USB memory drives are not properly recognized either.
>
>On a whim, I booted into a FreeSBIE live CD that I have, and it was 
>automounted and functioned correctly.
>
>One last little bit of interest, booting hangs immediately before attempting 
>to mount / if I boot with the device plugged in.  Booting continues normally 
>when I unplug the device.  I am not sure if this is significant.
>
>I would appreciate any help that could be offered.  Thanks.
>
>  
>
How are you mounting the drive?  Here is what works for me: 
mount_msdosfs /dev/da0s1 /mnt

Rem


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