Technical

PRIVHEAD - Technical

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Introduction

The Private Header (PRIVHEAD) structure is 512 bytes long and there are three copies on each physical disk. The first is located just after the partition table. The second is near the end of the LDM database. The third makes up the last 512 bytes of the physical disk.

Layout

Offset Size Description
0x00 8 "PRIVHEAD" Magic number
0x08 4
Don't know (looks sequential)
0x0C 2 Major Version Number (Always 0x02)
0x0E 2 Minor Version Number (Always 0x0B)
0x10 8 Timestamp (of what?)
0x18 8 Number?
0x20 8 Size?
0x28 8 Size?
0x30 64 Disk Id GUID (string, null padded)
0x70 64 Host Id GUID (string, null padded)
0xB0 64 Disk Group Id GUID (string, null padded)
0xF0 32 Disk Group Name (string, null padded)
0x110 2 Unknown
0x112 9 Zeros
0x11B 8 Logical Disk Start (a)
0x123 8 Logical Disk Size (a)
0x12B 8 Configuration Start (a)
0x133 8 Configuration Size (a)
0x13B 8 Number of TOCs
0x143 8 TOC Size
0x14B 4 Number of Configs
0x14F 4 Number of Logs
0x153 8 Size of Config
0x15B 8 Size of Log
0x163 4 Disk Signature (or zero)
0x167 16 Disk Set GUID (hex)
0x177 16 Disk Set GUID (hex) (duplicate?)

Notes

(a) Offsets and sizes are in sectors.

N.B. The final two GUIDs may be missing from the first PRIVHEAD.


Copyright © 2002, $Date: 2002/06/20 13:49:38 $ O L H C