3

I have a USB drive which I format with

sudo mkfs.vfat -I /dev/sdb1

When I then look at the size of the USB drive with df -h, it reports its size to be 64 MB, though it should be 8 GB. What am I doing wrong?

fdisk -l /dev/sdb1 gives

Disk /dev/sdb1: 67 MB, 67108864 bytes
241 heads, 62 sectors/track, 8 cylinders, total 131072 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

     Device Boot      Start         End      Blocks   Id  System
  • 1
    It looks like this USB drive has several partitions. What's the output of fdisk -l /dev/sdb? – Gilles Jul 27 '14 at 20:02
  • Edited the question. – pfnuesel Jul 27 '14 at 21:17
  • Not fdisk -l /dev/sdb1 (which lists the partitions inside the partition sdb1). Run fdisk -l /dev/sdb. – Gilles Jul 27 '14 at 21:21
6

It should be mkfs.vfat -I /dev/sdb. sdb1 indicates you probably have more than one partition, and you're just formatting the first one, which happens to be 64MiB.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.