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kos
Asked: 2015-02-23 08:12:41 +0800 CST

Why doesn't this custom created usb drive image mount?

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I'm trying to mount a custom usb drive image created with fdisk. This is how I created the image:

  1. Created a file of the exact same size of an old usb drive image used as a model: dd if=/dev/zero of=image.img count=30712320 (size: 15724707840 B, 15.7 GB)
  2. Created the partition table: in fdisk: o
  3. Created the partition: in fdisk: n, p, 1, enter, enter
  4. Toggled the partition type to W95 FAT 32 (LBA): in fdisk: t, c
  5. Set the boot flag to on: in fdisk: a, 1
  6. Wrote the changes to the image: in fdisk: w

Output of fdisk -l image.img:

Disk image.img: 15.7 GB, 15724707840 bytes
193 heads, 9 sectors/track, 17681 cylinders, total 30712320 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: 0xc8fac3e1

    Device Boot      Start         End      Blocks   Id  System
image.img1   *        2048    30712319    15355136    c  W95 FAT32 (LBA)

Everything seems ok, but the problem is I'm not able to mount the image:

1) sudo mount image.img /media/image:

mount: you must specify the filesystem type

2) sudo mount -t vfat image.img /media/image:

mount: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error
In some cases useful info is found in syslog - try dmesg | tail  or so

3) sudo mount -o offset=1048576 image.img /media/image (1048576=starting sector number*sector size):

mount: you must specify the filesystem type

4) sudo mount -t vfat -o offset=1048576 image.img /media/image (1048576=starting sector number*sector size):

mount: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error
In some cases useful info is found in syslog - try dmesg | tail  or so

Why does this happen?

fdisk

0 Answers