Re: [PATCH] try to avoid false positives on FAT filesystem

[phcoder <phcoder@gmail.com>]

Currently GRUB tries first the filesystem which was loaded at last. If 
you do
rmmod ext2
insmod ext2
then ext2 will be probed first. If we want reliable ordering we need 
priority field.
Thanks
Vladimir 'phcoder' Serbinenko

Felix Zielcke wrote:
> Am Freitag, den 06.02.2009, 07:07 +0100 schrieb phcoder:
>> If I understood you correctly you propose to use partition table 
>> information to determine filesystem. I'm personally against it. First of 
>> all it isn't portable - it probably wouldn't work on GPT. Second if you 
>> just do mkfs.* <device> the partition type isn't changed. Linux ignores 
>> partition type and so if your patch is applied there will be many bug 
>> reports like "hey, *FS isn't detected". Finally sometimes you 
>> intentionally change partition type in the technics like partition 
>> hiding. IMO the correct solution to this problem is to make sure that 
>> fat and ntfs are probed at last. Should we add a priority field for this?
> No I don't want to check the partition type.
> FAT partitions normally have the string FAT12/FAT16/FAT32 at the
> beginning of 512 bytes of the partition. But these DELL FAT partions
> have there the string .AT16 so it would be a solution for the Debian bug
> report we got.
> But yes the best would be to probe for FAT at last but I don't know how
> to change the order, in fs.lst FAT is listed after ext2 but it seems
> that FAT is checked before ext2.
>