tags 567337 + patch thanks whoops, i back my earlier remark -- i could succeed only because i had an ~/.mtoolsrc on the i386 box that contained:
mtools_skip_check=1 silly of me to have forgotten that. Removing that config file showed the error as usual. Here's the actual fix (many thanks to Matthew James Goins for helping figure this out): The problem is that the number of reserved sectors was changed in 3.0.8 to align the FATs with a 4096-byte boundary, but the boot sector was not updated to reflect the change. The attached patch resolves the issue as far as i can tell, by updating the boot sector's record of the number of reserved sectors. Note that according to wikipedia, > Reserved sector count. The number of sectors before the first FAT in > the file system image. Should be 1 for FAT12/FAT16. Usually 32 for > FAT32. http://en.wikipedia.org/wiki/File_Allocation_Table#Boot_Sector This suggests that the actual FAT relocation for alignment purposes might not be acceptable with some implementations of FAT16 or FAT12. The attached patch does not fix this (potential) problem -- it just documents the relocation properly in the boot sector. I can NMU this if you like. The patch is also available via git (against the upstream branch) at git://lair.fifthhorseman.net/~dkg/dosfstools Thanks for dosfstools. I hope this analysis and patch are useful. Regards, --dkg
--- dosfstools-3.0.8.orig/src/mkdosfs.c
+++ dosfstools-3.0.8/src/mkdosfs.c
@@ -1059,6 +1059,7 @@
/* Adjust the reserved number of sectors for alignment */
reserved_sectors = align_object(reserved_sectors, bs.cluster_size);
+ bs.reserved = CT_LE_W(reserved_sectors);
/* Adjust the number of root directory entries to help enforce alignment */
if (align_structures) {
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