Re: Mounting USB drive

[mlelstv%serpens.de@localhost (Michael van Elst)]

netverbs%gmail.com@localhost (Ron Georgia) writes:

>When trying to mount I get the following:
>sudo mount  /dev/sd0a /mnt/sans/
>mount_ffs: /dev/sd0a on /mnt/sans: incorrect super block

>sudo mount -t msdos /dev/sd0a /mnt/sans/
>mount_msdos: /dev/sd0a on /mnt/sans: Invalid argument

That probably says that there is no formatted filesystem,
neither FFS (very likely) nor FAT (that would be common)
on partition 'a'.


>4 partitions:
>#        size    offset     fstype [fsize bsize cpg/sgs]
> a:  30720000         0     4.2BSD      0     0     0  # (Cyl.      0 -  14999)
> d:  30720000         0     unused      0     0        # (Cyl.      0 -  14999)

>Partition table:
>0: Primary DOS with 32 bit FAT - LBA (sysid 12)
>    start 2048, size 30922752 (15099 MB, Cyls 0-1924/249/53), Active
>1: <UNUSED>
>2: <UNUSED>
>3: <UNUSED>

That doesn't agree. While a FAT partition at block 2048 on a 16GB drive
isn't that common, it's probably correct.

A synthesized disklabel would match the MBR, so that one has probably
been written to the USB drive.

Can you try to erase the label with 'disklabel -D sd0' ?

-- 
-- 
                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."