From the sysinternals website that is somewhat involved with microsoft:
"Neither UNTFS.DLL nor UFAT.DLL call file system drivers to take any part in a format or chkdsk operation - they directly read and write raw clusters on the drive."
Imre
-----Original Message----- From: Thomas Weidenmueller [mailto:w3seek@reactos.com] Sent: Monday, September 4, 2006 03:42 PM To: 'ReactOS Development List' Subject: Re: [ros-dev] Command line
The big benefit of using this library is that it let's you write code to manipulate the FAT file system that works on FAT12, FAT16, FAT32 without knowing the exact FAT file system this is going to run on. The same code works for FAT12, FAT16, FAT32 without having code that looks like:
In ROS each FS driver has to implement the defrag APIs. An application can defrag any FS by using the 3 publicly documented IOCTLs. UFAT/UNTFS/Uxxx... is not used for fs defragmentation.
Anyway this could be used as the basis for ufat.dll. The utilities that already use this library could then also be put in here. And the rest can then be easily written.
As mentioned above, defragmentation is done by the fs drivers in kernel mode.
What would then be needed is the actual functions that make up the interface to ufat.dll.
We can design the interfaces to ufat, untfs, ... as we wish. These interfaces are not documented publicly as there is no standard. each FS should come with it's own utilities. Chkdsk can only be used with the file systems that come with windows/reactos, other FS need to provide their own tools.
- Thomas
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