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50 lines
2.1 KiB
Text
50 lines
2.1 KiB
Text
mkdosfs - Make DOS file system utilty.
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I wrote this, partially to complement the dosfsck utility written by Werner
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Almesberger (who graciously gave me some pointers when I asked for some
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advice about writing this code), and also to avoid me having to boot DOS
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just to create data partitions (I use Linux to back up DOS :-) ).
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The code is really derived from Remy Card's mke2fs utility - I used this as a
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framework, although all of the file system specific stuff was removed and the
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DOS stuff inserted. I believe originally mke2fs was based on Linus' mkfs
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code, hence the acknowledgements in the source code.
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Neither Remy nor Linus have had any involvement with mkdosfs, so if there are
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any bugs they're almost certainly "all my own work".
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The code has been available for ftp since 1st September 1993, and I have yet
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to receive any bug reports from users. I don't know of any bugs, but if you
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do find a bug or have any constructive comments, please mail me!
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The only bug I found with version 0.1 was an obscure fault that could lead
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to an invalid (for MS-DOS, not Linux's dos fs) number of sectors used in the
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file allocation table(s).
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Dave Hudson
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dave@humbug.demon.co.uk
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FAT32 support
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=============
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mkdosfs now can also create filesystems in the new FAT32 format. To do
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this, give mkdosfs a "-F 32" option. FAT32 isn't selected
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automatically (yet), even if very large clusters are needed with
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FAT16. With FAT32 you have two additional options, -R to select the
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number of reserved sectors (usually 32), and -b to select the location
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of the backup boot sector (default 6). Of course such a backup is
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created, as well as the new info sector. On FAT32, the root directory
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is always created as a cluster chain. Sorry, there's no switch to
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generate an old static root dir.
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One bigger bug fix besides FAT32 was to reject filesystems that need a
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16 bit FAT to fit all possible clusters, but the bigger FAT needs some
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more sectors, so the total number of clusters drop below the border
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where MS-DOS expects a 12 bit FAT. So such filesystems would be FAT16,
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but interpreted as FAT32 by DOS. The fix is to reduce filesystem size
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a bit.
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- Roman <Roman.Hodek@informatik.uni-erlangen.de>
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