USB can't mount msdosfs drive

[Tijl Coosemans]

On 2013-06-05 18:33, Joseph Mays wrote:
> Joseph Mays:
>> Tried several iterations, though it’s clearly a fat32 formatted USB
>> drive. Shown below are the results of fdisk and the mount_msdosfs
>> command.
>> 
>> 
>> root at warehouse:/root # fdisk /dev/da2
>> ******* Working on device /dev/da2 *******
>> parameters extracted from in-core disklabel are:
>> cylinders=1897 heads=255 sectors/track=63 (16065 blks/cyl)
>> 
>> Figures below won't work with BIOS for partitions not in cyl 1
>> parameters to be used for BIOS calculations are:
>> cylinders=1897 heads=255 sectors/track=63 (16065 blks/cyl)
>> 
>> Media sector size is 512
>> Warning: BIOS sector numbering starts with sector 1
>> Information from DOS bootblock is:
>> The data for partition 1 is:
>> sysid 12 (0x0c),(DOS or Windows 95 with 32 bit FAT (LBA))
>>     start 8064, size 30473088 (14879 Meg), flag 80 (active)
>>         beg: cyl 1/ head 0/ sector 1;
>>         end: cyl 706/ head 115/ sector 52
>> The data for partition 2 is:
>> <UNUSED>
>> The data for partition 3 is:
>> <UNUSED>
>> The data for partition 4 is:
>> <UNUSED>
>> 
>> root at warehouse:/root # mount_msdosfs /dev/da2s1 /usb2
>> mount_msdosfs: /dev/da2s1: Invalid argument
>
> One item of note – I did not notice this before, the but following
> messages are appearing in dmesg whenever I try to mount this device.
> Note that I have another msdosfs usb stick mounted in usb0, that
> mount worked fine first try.
> 
> WARNING: mount of da2s1 denied due to unsupported optional features

That's odd, because that warning comes from ext2fs not msdosfs. Do you
use ext2fs anywhere?
What version of FreeBSD is this? And is this just a standard installation
or do you compile your own kernel?

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