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mkntfs: set the physical drive and the extended boot signature to 0x80 

in the Extended BPB which are needed to boot from disk
edge.strict_endians
szaka 2006-03-14 21:20:20 +00:00
parent 7685cb47e5
commit 43f2ab6ec3
3 changed files with 8 additions and 11 deletions
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2
ChangeLog
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@ -5,6 +5,8 @@ xx/xx/2006 - 1.13.1-WIP
- Fix build with --disable-gnome-vfs --enable-fuse-module. (Gentoo) - Fix build with --disable-gnome-vfs --enable-fuse-module. (Gentoo)
- ntfscluster: identify files even if their clusters aren't set - ntfscluster: identify files even if their clusters aren't set
in $Bitmap (useful to find potentially corrupted files). (Szaka) in $Bitmap (useful to find potentially corrupted files). (Szaka)
- mkntfs: set the physical drive and the extended boot signature to
0x80 in the Extended BPB which are needed to boot from disk. (Szaka)
27/02/2006 - 1.13.0 - Lots and lots and lots of fixes and enhancements. 27/02/2006 - 1.13.0 - Lots and lots and lots of fixes and enhancements.

11
include/ntfs/layout.h
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@ -70,13 +70,10 @@ typedef struct {
u8 jump[3]; /* Irrelevant (jump to boot up code).*/ u8 jump[3]; /* Irrelevant (jump to boot up code).*/
u64 oem_id; /* Magic "NTFS ". */ u64 oem_id; /* Magic "NTFS ". */
/*0x0b*/BIOS_PARAMETER_BLOCK bpb; /* See BIOS_PARAMETER_BLOCK. */ /*0x0b*/BIOS_PARAMETER_BLOCK bpb; /* See BIOS_PARAMETER_BLOCK. */
u8 unused[4]; /* zero, NTFS diskedit.exe states that u8 physical_drive; /* 0x00 floppy, 0x80 hard disk */
this is actually: u8 current_head; /* zero */
u8 physical_drive; // 0x80 u8 extended_boot_signature; /* 0x80 */
u8 current_head; // zero u8 reserved2; /* zero */
u8 extended_boot_signature; // 0x80
u8 unused; // zero
*/
/*0x28*/s64 number_of_sectors; /* Number of sectors in volume. Gives /*0x28*/s64 number_of_sectors; /* Number of sectors in volume. Gives
maximum volume size of 2^63 sectors. maximum volume size of 2^63 sectors.
Assuming standard sector size of 512 Assuming standard sector size of 512

6
ntfsprogs/mkntfs.c
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@ -4617,10 +4617,8 @@ static BOOL mkntfs_create_root_structures(void)
bs->bpb.hidden_sectors = cpu_to_le32(opts.part_start_sect); bs->bpb.hidden_sectors = cpu_to_le32(opts.part_start_sect);
ntfs_log_debug("hidden sectors = %llu (0x%llx)\n", opts.part_start_sect, ntfs_log_debug("hidden sectors = %llu (0x%llx)\n", opts.part_start_sect,
opts.part_start_sect); opts.part_start_sect);
/* bs->physical_drive = 0x80; /* boot from hard disk */
* If there are problems go back to bs->unused[0-3] and set them. See bs->extended_boot_signature = 0x80; /* everybody sets this, so we do */
* ../include/layout.h for details.
*/
bs->number_of_sectors = cpu_to_sle64(opts.num_sectors); bs->number_of_sectors = cpu_to_sle64(opts.num_sectors);
bs->mft_lcn = cpu_to_sle64(g_mft_lcn); bs->mft_lcn = cpu_to_sle64(g_mft_lcn);
bs->mftmirr_lcn = cpu_to_sle64(g_mftmirr_lcn); bs->mftmirr_lcn = cpu_to_sle64(g_mftmirr_lcn);