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Groups > linux.debian.user > #178593
| From | David Christensen <dpchrist@holgerdanske.com> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | MBR partitioning, and content after partition table but before first partition |
| Date | 2017-03-09 06:50 +0100 |
| Message-ID | <tiZ7z-Bz-3@gated-at.bofh.it> (permalink) |
| References | <tiAVz-JT-5@gated-at.bofh.it> <tiHDI-5Js-17@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 03/08/2017 03:02 AM, Thomas Schmitt wrote: > David Christensen wrote: >> AFAIK when using MBR partitioning, the partition table (blocks 0-62) > > The MBR partition table resides in the first 512-bytes block. > It may be extended by a chain of partitions starting at the Extended > Partition of the MBR partition table. > The EBRs of the logical partitions are stored at the start of those > partitions. I.e. scattered over the storage medium. Okay. Examining a Windows XP disk, the first partition (C:\) starts at block 63 (track 1): $ cat windows-xp-parted-u-s-p.out Model: ATA WDC WD800JB-00FM (scsi) Disk /dev/sdb: 156301488s Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 63s 156296384s 156296322s primary ntfs boot $ cat windows-xp-parted-u-chs-p.out Model: ATA WDC WD800JB-00FM (scsi) Disk /dev/sdb: 9729,80,62 Sector size (logical/physical): 512B/512B BIOS cylinder,head,sector geometry: 9729,255,63. Each cylinder is 8225kB. Partition Table: msdos Number Start End Type File system Flags 1 0,1,0 9728,254,62 primary ntfs boot Blocks 1-62 should probably be zeros, but it appears Norton Ghost 2003 marked this drive: $ dd if=windows-xp-blocks-0-62.img 2>/dev/null | hexdump -C | tail -n 12 000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00000200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00007c00 12 91 f2 60 90 a0 2f 19 01 00 00 00 85 00 67 68 |...`../.......gh| 00007c10 46 44 23 cc 22 52 1d ac 22 52 32 4e 6f 72 74 6f |FD#."R.."R2Norto| 00007c20 6e 20 47 68 6f 73 74 20 32 30 30 33 00 00 00 00 |n Ghost 2003....| 00007c30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00007c90 00 00 00 00 00 00 00 04 00 94 2d d0 80 00 00 00 |..........-.....| 00007ca0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00007e00 Examining a Jesse system drive, the first partition starts at block 2048 (1 MB = 2**20 bytes): 2017-03-08 21:30:04 root@jesse ~ # parted /dev/sda u s p Model: ATA SAMSUNG SSD UM41 (scsi) Disk /dev/sda: 31277232s Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 2048s 976895s 974848s primary ext4 boot 2 976896s 1953791s 976896s primary 3 1953792s 28125183s 26171392s primary There is content in the first 101 blocks (1 MBR plus 100 other): 2017-03-08 21:30:06 root@jesse ~ # dd if=/dev/sda count=2048 2>/dev/null | hexdump -C | tail 0000c990 b0 b3 2c fa a4 38 f1 f8 77 f0 2d dd c2 4a a4 a9 |..,..8..w.-..J..| 0000c9a0 cd 43 15 5a b7 43 1e 6b 8b 01 ad 6f a0 b9 63 fd |.C.Z.C.k...o..c.| 0000c9b0 b8 59 4d 69 f4 33 d4 f4 0a c1 d0 61 df 84 a9 74 |.YMi.3.....a...t| 0000c9c0 64 44 ae 2d de bc c5 de 73 90 d8 94 ef b2 5a 7c |dD.-....s.....Z|| 0000c9d0 fe 4c ee d8 a0 d7 ce ae 28 72 cc 5b 7e 05 23 ee |.L......(r.[~.#.| 0000c9e0 39 d0 44 7a 1c 0a 10 ab e4 f6 3b 6f 43 d1 e6 92 |9.Dz......;oC...| 0000c9f0 11 0b 3f ec c4 cf b1 ab 81 b9 5b 77 d8 be 90 c6 |..?.......[w....| 0000ca00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00100000 What is in blocks 1-101? David
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Some help with dd backing up into an iso GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-07 01:20 +0100
Re: Some help with dd backing up into an iso Michael Lange <klappnase@freenet.de> - 2017-03-07 02:10 +0100
Re: Some help with dd backing up into an iso David Christensen <dpchrist@holgerdanske.com> - 2017-03-07 06:10 +0100
Re: Some help with dd backing up into an iso David Christensen <dpchrist@holgerdanske.com> - 2017-03-07 07:00 +0100
Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 09:00 +0100
Re: Some help with dd backing up into an iso GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-07 18:30 +0100
Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 20:20 +0100
Re: Some help with dd backing up into an iso GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-08 05:00 +0100
Re: Some help with dd backing up into an iso David Christensen <dpchrist@holgerdanske.com> - 2017-03-08 07:00 +0100
Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-08 12:10 +0100
MBR partitioning, and content after partition table but before first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-09 06:50 +0100
Re: MBR partitioning, and content after partition table but before first partition Felix Miata <mrmazda@earthlink.net> - 2017-03-09 08:00 +0100
Re: MBR partitioning, and content after partition table but before first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-10 06:10 +0100
Re: MBR partitioning, and content after partition table but before first partition Jonathan Dowland <jmtd@debian.org> - 2017-03-10 10:00 +0100
Re: MBR partitioning, and content after partition table but before first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-11 07:10 +0100
Re: MBR partitioning, and content after partition table but before first partition Jonathan Dowland <jmtd@debian.org> - 2017-03-13 10:10 +0100
Re: MBR partitioning, and content after partition table but before first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-14 04:40 +0100
Re: MBR partitioning, and content after partition table but before first partition David <bouncingcats@gmail.com> - 2017-03-14 11:40 +0100
Re: MBR partitioning, and content after partition table but before first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-15 03:50 +0100
Re: MBR partitioning, and content after partition table but before first partition The Wanderer <wanderer@fastmail.fm> - 2017-03-14 13:00 +0100
Re: MBR partitioning, and content after partition table but before first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-15 04:10 +0100
Re: MBR partitioning, and content after partition table but before first partition Andy Smith <andy@strugglers.net> - 2017-03-15 04:40 +0100
Re: MBR partitioning, and content after partition table but before first partition Jonathan Dowland <jmtd@debian.org> - 2017-03-15 13:00 +0100
Re: MBR partitioning, and content after partition table but before first partition "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-09 08:30 +0100
Re: MBR partitioning, and content after partition table but before first partition Jonathan Dowland <jmtd@debian.org> - 2017-03-09 15:40 +0100
Re: Some help with dd backing up into an iso Teemu Likonen <tlikonen@iki.fi> - 2017-03-07 09:30 +0100
Re: Some help with dd backing up into an iso <tomas@tuxteam.de> - 2017-03-07 09:40 +0100
Re: Some help with dd backing up into an iso Teemu Likonen <tlikonen@iki.fi> - 2017-03-07 10:00 +0100
Re: Some help with dd backing up into an iso <tomas@tuxteam.de> - 2017-03-07 10:10 +0100
Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-07 16:20 +0100
Re: Some help with dd backing up into an iso Jonathan Dowland <jmtd@debian.org> - 2017-03-07 11:10 +0100
Re: Some help with dd backing up into an iso David Christensen <dpchrist@holgerdanske.com> - 2017-03-08 06:00 +0100
Re: Some help with dd backing up into an iso Mark Fletcher <mark27q1@gmail.com> - 2017-03-07 12:10 +0100
Re: Some help with dd backing up into an iso Eduardo M KALINOWSKI <eduardo@kalinowski.com.br> - 2017-03-07 14:50 +0100
Re: Some help with dd backing up into an iso Elimar Riesebieter <riesebie@lxtec.de> - 2017-03-07 15:20 +0100
Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-07 16:20 +0100
Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 18:10 +0100
Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-07 19:00 +0100
Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 20:30 +0100
Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-07 21:30 +0100
Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 22:10 +0100
Re: Some help with dd backing up into an iso GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-08 18:30 +0100
Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-08 19:20 +0100
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