* FAT : FAT16 support maximum 4GB file/vol size like WinXP or 7.
@ 2011-07-24 13:08 NamJae Jeon
2011-07-25 20:19 ` OGAWA Hirofumi
0 siblings, 1 reply; 3+ messages in thread
From: NamJae Jeon @ 2011-07-24 13:08 UTC (permalink / raw)
To: hirofumi; +Cc: linux-kernel
Hello Hirofumi
Win NT/XP/7 increased the maximum cluster size to 64KB, and file/vol
size increased 4GB also.
Although increasing , the file size of linux FAT is still limited at 2GB.
I found that it is limited by sb->s_maxbytes(0x7fffffff) when
partition is formatted by FAT16.
I think that sb->s_maxbytes in fill_super should be set to 0xffffffff
like Fat32.
I want to know your opinion.
Thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: FAT : FAT16 support maximum 4GB file/vol size like WinXP or 7.
2011-07-24 13:08 FAT : FAT16 support maximum 4GB file/vol size like WinXP or 7 NamJae Jeon
@ 2011-07-25 20:19 ` OGAWA Hirofumi
[not found] ` <CAKYAXd-KftOw-YMoA82-75Yp6FNYAXmna+5Fxe0JCMmUB3+-bg@mail.gmail.com>
0 siblings, 1 reply; 3+ messages in thread
From: OGAWA Hirofumi @ 2011-07-25 20:19 UTC (permalink / raw)
To: NamJae Jeon; +Cc: linux-kernel
NamJae Jeon <linkinjeon@gmail.com> writes:
> Hello Hirofumi
>
> Win NT/XP/7 increased the maximum cluster size to 64KB, and file/vol
> size increased 4GB also.
>
> Although increasing , the file size of linux FAT is still limited at 2GB.
>
> I found that it is limited by sb->s_maxbytes(0x7fffffff) when
> partition is formatted by FAT16.
Yes. Now, only FAT32 allows it.
> I think that sb->s_maxbytes in fill_super should be set to 0xffffffff
> like Fat32.
>
> I want to know your opinion.
In my knowledge, Windows was limiting it as 2GB intentionally for
compatibility reason.
If Windows changed mind, I think it's good that we allow it too for 64KB
cluster. BTW, you can select FAT16 with 64KB on Windows?
Thanks.
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: FAT : FAT16 support maximum 4GB file/vol size like WinXP or 7.
[not found] ` <CAKYAXd-KftOw-YMoA82-75Yp6FNYAXmna+5Fxe0JCMmUB3+-bg@mail.gmail.com>
@ 2011-07-25 22:32 ` NamJae Jeon
0 siblings, 0 replies; 3+ messages in thread
From: NamJae Jeon @ 2011-07-25 22:32 UTC (permalink / raw)
To: OGAWA Hirofumi; +Cc: linux-kernel
Hi.
And after modifing 0xffffffff, I confirm that it is working well such
as copying file of over 2GB size, etc..
Thanks
2011/7/26 NamJae Jeon <linkinjeon@gmail.com>:
> Hi.
>
> 2011/7/26 OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>:
>> NamJae Jeon <linkinjeon@gmail.com> writes:
>>
>>> Hello Hirofumi
>>>
>>> Win NT/XP/7 increased the maximum cluster size to 64KB, and file/vol
>>> size increased 4GB also.
>>>
>>> Although increasing , the file size of linux FAT is still limited at 2GB.
>>>
>>> I found that it is limited by sb->s_maxbytes(0x7fffffff) when
>>> partition is formatted by FAT16.
>>
>> Yes. Now, only FAT32 allows it.
>>
>>> I think that sb->s_maxbytes in fill_super should be set to 0xffffffff
>>> like Fat32.
>>>
>>> I want to know your opinion.
>>
>> In my knowledge, Windows was limiting it as 2GB intentionally for
>> compatibility reason.
>>
>> If Windows changed mind, I think it's good that we allow it too for 64KB
>> cluster. BTW, you can select FAT16 with 64KB on Windows?
>>
> Yes, I can select FAT16 with 64KB cluster size on Windows when
> formatting usb storage of 4GB size.
>
> Thanks
>> Thanks.
>> --
>> OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
>>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-07-24 13:08 FAT : FAT16 support maximum 4GB file/vol size like WinXP or 7 NamJae Jeon
2011-07-25 20:19 ` OGAWA Hirofumi
[not found] ` <CAKYAXd-KftOw-YMoA82-75Yp6FNYAXmna+5Fxe0JCMmUB3+-bg@mail.gmail.com>
2011-07-25 22:32 ` NamJae Jeon
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