Question about FAT16

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January 13th, 2008, 06:24 AM

tootypegs

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Question about FAT16

Hi, im new to this forum, but hopefully this is the right place to come to. I have a question regards to directory entries on a FAT 16 file system but before i as, am i in the right place ?

January 13th, 2008, 07:13 AM

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Sure, ask away. The FAT filesystem was developed by Microsoft for MS-DOS and is the primary file system for Windows systems up to and including Windows Me. It will fit in with this forum.

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January 13th, 2008, 08:54 PM

sbenj69

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So what is your question on FAT 16? Dare I ask

FAT 16 was phased out with Windows 95 OSR2, making way for FAT 32 which support for FAT 32 was included in Windows 98, Me, 2000, and XP. Windows 98 included a tool to upgrade FAT 16 to FAT 32. I am not sure with Vista, as I haven't really delved into it that much.

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Last edited by sbenj69 : January 13th, 2008 at 09:02 PM.

January 14th, 2008, 01:05 PM

tootypegs

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basically im trying to parse a FAT 16 image file in c++. Ive got it all sorted to the point of dreaded Long file names!!!

i am aware that LFN's preceed the SFN in the directory structures but is there a way of telling how many are used to describe an LFN. For example if i have "my very very long file name" in the first LFN directory entry is there a byte that say like this file name covers 3 LFN entrys then the short file name will follow. I thought the first byte was a flag for this but im not sure?

i hope ive explained myself well enough

thanks

January 14th, 2008, 02:47 PM

sbenj69

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>THIS< may help. Specifically in this article, this line:

Quote:

Whenever you create a file with a long file name, The OS creates a conventional 8.3 name for the file and one or more secondary folder entries for the file, one for each 13 characters in the long file name. Each secondary folder entry stores a corresponding part of the long file name in Unicode.

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