From 9c754053b07a724bdd98d039f34899d6a49115b7 Mon Sep 17 00:00:00 2001 From: bigbiff bigbiff Date: Wed, 9 Jan 2013 09:09:08 -0500 Subject: Add libtar to TWRP instead of using busybox tar Add proper mkdosfs tool Add fuse to TWRP Add experimental exfat-fuse to TWRP Convert all system() functions to use new Exec_Cmd function --- dosfstools/doc/README.mkdosfs | 50 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 dosfstools/doc/README.mkdosfs (limited to 'dosfstools/doc/README.mkdosfs') diff --git a/dosfstools/doc/README.mkdosfs b/dosfstools/doc/README.mkdosfs new file mode 100644 index 000000000..ae93ada4e --- /dev/null +++ b/dosfstools/doc/README.mkdosfs @@ -0,0 +1,50 @@ +mkdosfs - Make DOS file system utilty. + + +I wrote this, partially to complement the dosfsck utility written by Werner +Almesberger (who graciously gave me some pointers when I asked for some +advice about writing this code), and also to avoid me having to boot DOS +just to create data partitions (I use Linux to back up DOS :-) ). + +The code is really derived from Remy Card's mke2fs utility - I used this as a +framework, although all of the file system specific stuff was removed and the +DOS stuff inserted. I believe originally mke2fs was based on Linus' mkfs +code, hence the acknowledgements in the source code. + +Neither Remy nor Linus have had any involvement with mkdosfs, so if there are +any bugs they're almost certainly "all my own work". + +The code has been available for ftp since 1st September 1993, and I have yet +to receive any bug reports from users. I don't know of any bugs, but if you +do find a bug or have any constructive comments, please mail me! + +The only bug I found with version 0.1 was an obscure fault that could lead +to an invalid (for MS-DOS, not Linux's dos fs) number of sectors used in the +file allocation table(s). + + +Dave Hudson +dave@humbug.demon.co.uk + + +FAT32 support +============= + +mkdosfs now can also create filesystems in the new FAT32 format. To do +this, give mkdosfs a "-F 32" option. FAT32 isn't selected +automatically (yet), even if very large clusters are needed with +FAT16. With FAT32 you have two additional options, -R to select the +number of reserved sectors (usually 32), and -b to select the location +of the backup boot sector (default 6). Of course such a backup is +created, as well as the new info sector. On FAT32, the root directory +is always created as a cluster chain. Sorry, there's no switch to +generate an old static root dir. + +One bigger bug fix besides FAT32 was to reject filesystems that need a +16 bit FAT to fit all possible clusters, but the bigger FAT needs some +more sectors, so the total number of clusters drop below the border +where MS-DOS expects a 12 bit FAT. So such filesystems would be FAT16, +but interpreted as FAT32 by DOS. The fix is to reduce filesystem size +a bit. + +- Roman -- cgit v1.2.3