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//usr/share/doc/dosfstools/README.dosfsck
dosfsck, version 1 ================== WARNING: This is ALPHA test software. Use at your own risk. dosfsck is the Linux equivalent of PC/MS-DOS' CHKDSK. It checks the consistency of PC/MS-DOS filesystems and optionally tries to repair them. The tests dosfsck performs are described in the man page. dosfsck needs header files from dosfs.9 (or later) to compile. Before using dosfsck to repair a filesystem that contains data of any value, you should verify that dosfsck is able to correct all reported errors. (Except fatal errors and those reported as unfixable, of course.) In order to do this, run it with the -V option, e.g. dosfsck -V /dev/sda1 (automatic check) or dosfsck -V -r /dev/sda1 (interactive check and repair) dosfsck will perform two passes: in the first pass, inconsistencies are detected and a list of changes to correct the problems is generated. In the second pass, those changes are applied whenever dosfsck reads data from disk. Hence no fixable errors should be reported in the second pass if the first pass was successful. Please notify the author if fixable errors are reported in the second pass. After verifying that dosfsck appears to be able to perform the desired operations, either confirm that you want the changes to be performed (if dosfsck was started with -r) or re-run dosfsck with the -a option (if it was started without -r). Please send bug reports, comments, flames, etc. to almesber@nessie.cs.id.ethz.ch or almesber@bernina.ethz.ch - Werner FAT32 and LFN support ===================== I've finally implemented some of the new features of MS-DOS filesystems: FAT32 and long filenames. FAT32 is automatically detected and of course the different FAT structure is handled. (Internally many changes were needed, so 32 bit variables for all cluster numbers and 64 bit vars for offsets inside the filesystem.) New checks for FAT32 are most notably on the backup boot sector and the new info sector. Also the possibility that the root directory resides in a cluster chain (instead of in a static area) on FAT32 is handled. dosfscheck also knows about VFAT long filenames now. It parses those names and uses them in listings etc. when available. There are also some checks on the (cruel) structure of how LFNs are stored and some attempts to fix problems. - Roman <roman@hodek.net> BTW, version 2 isn't ALPHA anymore :-)
