Re: [OT] Re: bug? VFAT copy problem

OGAWA Hirofumi
2006-11-23T11:38:54Z

DervishD <lkml@dervishd.net> writes:

> * Sergio Monteiro Basto <sergio@sergiomb.no-ip.org> dixit:
>> On Wed, 2006-11-22 at 15:53 +0100, DervishD wrote:
>> > * Sergio Monteiro Basto <sergio@sergiomb.no-ip.org> dixit:
>> > > Have vfat a limit of a file size when copy ?
>> >
>> > 2GB, if I recall correctly. FAT32 itself has a limit of 4GB-1 for
>> > file size, but Linux restricts it even more (don't ask me why).
>>
>> May I say that FAT32 have a bigger limit (at least on last Windows).
>
> I really don't know, but from microsoft technical information
> (the first or second hit when googling for "FAT32 size limit"), the
> limit they specify in FAT32 is 2^32-1.
>
> I may be wrong, but with 32 bits you cannot address more than
> 2^32 bytes, I don't know how can you create a bigger-than-4Gb file in
> a FAT32 filesystem without resorting to tricks like this:
>
> forum.doom9.org/archive/index.php/t-20689.html
>
> Looks like FAT-32 (don't ask me how because I don't know the
> internals) can store a file bigger than 4GB, but you cannot *save*
> it. So you won't be able to put the file you have back to any FAT32
> filesystem, I'm afraid.

Right. FAT's size field is 32bit, so *file* of FAT has limit of 4GB-1.
(Since directory doesn't have size, in theoretically it can exceed 4GB-1)

Hm.. Maybe MS added a new hack to FAT..?
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>