Hi Y'all;
Although it not clear to me what your present configuration is, it
appears that you are try to mount the 'pen drive' as a SCSI device
(da0), and that could be your problem.
from the manual:
*Table 3-1. Disk Device Codes*
Code Meaning
ad ATAPI (IDE) disk
da SCSI direct access disk
acd ATAPI (IDE) CDROM
cd SCSI CDROM
fd Floppy disk
You may want to check out the manual at
http://leaf.dragonflybsd.org/~justin/handbook/disk-organization.html
for additional information, and you will probably get better reponses if
you post your questions to users@crater.dragonflybsd.org instead of the
kernel forum;-).
Best regards,
Tiv