Roland Smith <rsm...@xs4all.nl> wrote: > On Thu, Apr 09, 2009 at 12:47:23PM -0700, per...@pluto.rain.com wrote: > > It's an SD card, not a "drive", so I had not expected it to be > > partitioned; but yes, it is: > > > > $ ls -l /dev/da0* > > crw-r----- 1 root operator 0, 244 Feb 14 15:09 /dev/da0 > > crw-r----- 1 root operator 0, 245 Feb 14 15:09 /dev/da0s1 > > That would suggest that there is a filesystem on there, doesn't it?
It would certainly suggest there is a DOS "partition" table aka BSD "slice" table. I don't think it says anything about what the slice contains, however. > > $ dd if=/dev/da0 of=~/sd bs=1b > > > > That's been running for something like 45 minutes now, and based > > on the size of the output file it has read about a tenth of the > > card. > > Reading one byte at a time is bound to be slow. "dd bs=1b" is one block (512 bytes), not one byte. At least it seems to be working. I *would* anticipate problems if trying to read a umass device in units not a multiple of its native blocksize. > It could be that this USB chipset needs some "quirks" to work > correctly. like "Don't attempt to read more than 32768 bytes at a time" -- subsequent testing shows it to be OK up to bs=64b, but bs=126b fails -- or is there maybe a way to set that sort of limit in mtools? _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"