Hi:
If I comprehend the question, you're not sure how to tell what file system the SD card is formatted for?
And further, how to format a partition as FAT16?
On WINDOWS, go to "MY COMPUTER" and right-click on the SD card drive. Select "properties" and it will show you (see below).
If using Linux, which I think you are, you can use 'fdisk' to show you how each partition is formatted. See the last line below.
toshl755d $ sudo fdisk -l /dev/sdc
Disk /dev/sdc: 7.4 GiB, 7948206080 bytes, 15523840 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
Disklabel type: dos
Disk identifier: 0x00000000
?
Device? ? ?Boot Start? ? ? End? Sectors? Size Id Type
/dev/sdc1? ? ? ? 8192 15523839 15515648? 7.4G? b W95 FAT32
As far as formatting under Linux, you can run (sudo or as root) GPARTED or as stated above, mkfs.vfat but be aware that mkfs.vfat allows you to specify the type of FAT used to format the partition with the '-F' option:?
? mkfs.fat 3.0.28 (2015-05-16)
? No device specified!?
? Usage: mkfs.fat [-a][-A][-c][-C][-v][-I][-l bad-block-file][-b backup-boot-sector]
? ? ? ? ?[-m boot-msg-file][-n volume-name][-i volume-id]
? ? ? ? ?[-s sectors-per-cluster][-S logical-sector-size][-f number-of-FATs]
? ? ? ? ?[-h hidden-sectors][-F fat-size][-r root-dir-entries][-R reserved-sectors]
? ? ? ? ?[-M FAT-media-byte][-D drive_number]
? ? ? ? ?[--invariant]
? ? ? ? ?[--help]
? ? ? ? ?/dev/name [blocks]
From the mkfs.vfat man file:
? -F FAT-SIZE
? ? ? ? ? ? ? Specifies the type of file allocation tables used (12, 16 or 32 bit).? If nothing is?
? ? ? ? ? specified, mkfs.fat will? automatically select between 12, 16 and 32 bit, whatever?
fits better for the filesystem size.
? ?
Hope that helps.
Happy New Year!
Peace and blessings,
JQ
