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Operating Systems
Linux
C++ Code to Access Linux Hard Disk Sectors (with a LoopBack Virtual Hard Disk)
Post 302491460 by Corona688 on Thursday 27th of January 2011 01:38:15 PM
01-27-2011
Quote:
Hi Corona688,
Thank you very very much for the immense support you've given me throughout this thread. I've learned a lot from you since I started this thread
. I understand what I should do and how I should proceed. Thanks you very much sir.
I've tried the HexDump Command you gave me on my Virtual MS-DOS(FAT-16) Floppy Drive & as follows :
Thank you very very much for the immense support you've given me throughout this thread. I've learned a lot from you since I started this thread
. I understand what I should do and how I should proceed. Thanks you very much sir.I've tried the HexDump Command you gave me on my Virtual MS-DOS(FAT-16) Floppy Drive & as follows :
Code:
00000000 eb 3c 90 6d 6b 64 6f 73 66 73 00 00 02 01 01 00 |.<.mkdosfs......|
00000010 02 e0 00 40 0b f0 09 00 12 00 02 00 00 00 00 00 |...@............|
00000020 00 00 00 00 00 00 29 26 7a d7 50 20 20 20 20 20 |......)&z.P |
00000030 20 20 20 20 20 20 46 41 54 31 32 20 20 20 0e 1f | FAT12 ..|
00000040 be 5b 7c ac 22 c0 74 0b 56 b4 0e bb 07 00 cd 10 |.[|.".t.V.......|
00000050 5e eb f0 32 e4 cd 16 cd 19 eb fe 54 68 69 73 20 |^..2.......This |
00000060 69 73 20 6e 6f 74 20 61 20 62 6f 6f 74 61 62 6c |is not a bootabl|
00000070 65 20 64 69 73 6b 2e 20 20 50 6c 65 61 73 65 20 |e disk. Please |
00000080 69 6e 73 65 72 74 20 61 20 62 6f 6f 74 61 62 6c |insert a bootabl|
00000090 65 20 66 6c 6f 70 70 79 20 61 6e 64 0d 0a 70 72 |e floppy and..pr|You don't need to use the loop device for anything but mounting the partition (something you intend to avoid doing anyway). As far as mkfs.msdos, read(), and write() are concerned they act the same.
Last edited by Corona688; 01-27-2011 at 02:44 PM..
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LEARN ABOUT DEBIAN
disktype
DISKTYPE(1) BSD General Commands Manual DISKTYPE(1) NAME
disktype -- disk format detector SYNOPSIS
disktype file... DESCRIPTION
The purpose of disktype is to detect the content format of a disk or disk image. It knows about common file systems, partition tables, and boot codes. USAGE
disktype can be run with any number of regular files or device special files as arguments. They will be analyzed in the order given, and the results printed to standard output. There are no switches in this version. Note that running disktype on device files like your hard disk will likely require root rights. See the online documentation at <http://disktype.sourceforge.net/doc/> for some example command lines. RECOGNIZED FORMATS
The following formats are recognized by this version of disktype. File systems: FAT12/FAT16/FAT32, NTFS, HPFS, MFS, HFS, HFS Plus, ISO9660, ext2/ext3, Minix, ReiserFS, Reiser4, Linux romfs, Linux cramfs, Linux squashfs, UFS (some variations), SysV FS (some variations), JFS, XFS, Amiga FS/FFS, BeOS BFS, QNX4 FS, UDF, 3DO CD-ROM file system, Veritas VxFS, Xbox DVD file system. Partitioning: DOS/PC style, Apple, Amiga "Rigid Disk", ATARI ST (AHDI3), BSD disklabel, Linux RAID physical disks, Linux LVM1 physical volumes, Linux LVM2 physical volumes, Solaris x86 disklabel (vtoc), Solaris SPARC disklabel. Other structures: Debian split floppy header, Linux swap. Disk images: Raw CD image (.bin), Virtual PC hard disk image, Apple UDIF disk image (limited). Boot codes: LILO, GRUB, SYSLINUX, ISOLINUX, Linux kernel, FreeBSD loader, Sega Dreamcast (?). Compression formats: gzip, compress, bzip2. Archive formats: tar, cpio, bar, dump/restore. Compressed files (gzip, compress, bzip2 formats) will also have their contents analyzed using transparent decompression. The appropriate com- pression program must be installed on the system, i.e. gzip(1) for the gzip and compress formats, bzip2(1) for the bzip2 format. Disk images in general will also have their contents analyzed using the proper mapping, with the exception of the Apple UDIF format. See the online documentation at <http://disktype.sourceforge.net/doc/> for more details on the supported formats and their quirks. HOMEPAGE
http://disktype.sourceforge.net/ AUTHOR
Christoph Pfisterer <chrisp@users.sourceforge.net> SEE ALSO
file(1), gpart(8) Feb 21, 2005