[ros-kernel] AW: problem with fat32

[Hartmut B. <har...@te...>]

This problem comes from ROS. FAT32WriteCluster writes a cluster 
number to the fat. When the value is 0xffffffff (last cluster), the higher
4 bits are set. Win9x does ignore this bits.

- Hartmut

> -----Ursprungliche Nachricht-----
> Von:	Hartmut Birr [SMTP:har...@te...]
> Gesendet am:	Mittwoch, 3. Oktober 2001 19:05
> An:	'ros...@re...'
> Betreff:	[ros-kernel] problem with fat32
> 
> Hi,
> 
> for testing, I use an old PC with a FAT32 boot partition. 
> Sometimes I can't boot ROS on this PC or can't start one 
> of the applications. There occurs a page fault like this:
> 
> Page Fault Exception: 14(4)
> ...
> 
> Now I've found the problem. The page fault comes from 
> MiReadPage. MiReadPage read the page from a file, 
> but the read operation returns with status 0xc000000d 
> (STATUS_INVALID_PARAMETER). The problem is the 
> function GetNextCluster (in vfatfs). Some clusters in the fat 
> have set the highest 4 bits (0x00000ca0 -> 0xf0000ca0). 
> When vfatfs try to get the next cluster, there is a read over 
> the end of the partition. When I delete or overwrite this files 
> in Win9x, the 4 bits are not deleted. I can fix this problem 
> for ROS. But has anyone an idea, why Win9x does set the 
> highest 4 bits for some clusters ?
> 
> - Hartmut    

====================================================
= To remove yourself from this mailing list, go to =
= http://www.reactos.com/home/mailing.html         =
====================================================