ISO file to sd card: Disk /dev/sdb doesn't contain a valid partition table

[local10 <local10@tutanota.com>]

Hi,

Am having issues trasfering iso file to an sd card using dd:

# dd if=/tmp/winfile.iso of=/dev/sdb bs=1M conv=fsync

dd completes successfully without any issues but when I try to mount the sd card I can't (wrong fs type, bad option, bad superblock on /dev/sdb1) and fdisk says "Disk /dev/sdb doesn't contain a valid partition table". That's kind of strange as I can mount and read /tmp/winfile.iso and it seems to be in good order.

Any ideas? Thanks


# fdisk -l /dev/sdb
...
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table