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8GB FAT32 filesystem that normally mounted as intended using usbmount. When I went to take it out to plug into a difference computer I did umount /dev/sda1 which is where it was.

Now it fails to automount either on boot or when I plug it in. When I run

sudo mount -t vfat -o rw /dev/sda1 /media/

it fails to mount with dmesg

[   15.204564] FAT-fs (sda1): bogus number of reserved sectors
[   15.214057] FAT-fs (sda1): Can't find a valid FAT filesystem

I presume I shouldn't have umounted then? How do I restore mounting (and automounting) of the drive? OS is Raspbian (Debian) on a RaspberryPi

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  • 2
    It's corrupted. Can't find a valid FAT filesystem
    – daisy
    Oct 22, 2012 at 8:04
  • So it was. How would that have happened? It was working fine when I removed it correctly from my W7 workstation? Oct 22, 2012 at 8:07
  • Have you tried running fsck on it? And does it work if you plug it into a Windows system?
    – ShankarG
    Oct 22, 2012 at 8:20

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