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VMDB - LDM Documentation

Overview

The VMDB is 512 bytes long.

Layout

Offset Size Description
0x00 4 "VMDB" Magic number
0x04 4 Sequence Number of last VBLK
0x08 4 Size of VBLK
0x0C 4 Offset to first VBLK
0x10 2 Don't know (0x01)
0x12 2 Version Major
0x14 2 Version Minor
0x16 31 Disk Group Name (string, null padded)
0x35 64 Disk Group Id GUID (string, null padded)
0x75 8 Committed Sequence
0x7D 8 Pending Sequence
0x85 56 14 4-Byte Unknowns < 0x10
0xBD 4 Timestamp

VBLK Element Name Contents
Disk Group AddlestonesDg0  
Disk Disk1 Physical Disk 1 (hda)
  Partition   Disk1-01 Mirror 1/2
  Partition   Disk1-02 Stripe 1/2
  Partition   Disk1-03 Raid 1/3
Disk Disk2 Physical Disk 2 (hdb)
  Partition   Disk2-01 Spanned 1/2
  Partition   Disk2-02 Raid 2/3
Disk Disk3 Physical Disk 2 (hdc)
  Partition   Disk3-01 Raid 3/3
  Partition   Disk3-02 Mirror 2/2
  Partition   Disk3-03 Spanned 2/2
  Partition   Disk3-04 Stripe 2/2
Volume Volume1 Mirror
  Component   Volume1-01  
    Partition     Disk1-01 Mirror 1/2
  Component   Volume1-02  
    Partition     Disk3-02 Mirror 2/2
Volume Volume2 Stripe
  Component   Volume2-01  
    Partition     Disk1-02 Stripe 1/2
    Partition     Disk3-04 Stripe 2/2
Volume Volume3 Spanned
  Component   Volume3-01  
    Partition     Disk2-01 Stripe 1/2
    Partition     Disk3-03 Stripe 2/2
Volume Volume4 Raid
  Component   Volume4-01  
    Partition     Disk1-03 Raid 1/3
    Partition     Disk2-02 Raid 2/3
    Partition     Disk3-01 Raid 3/3
    A partition has two parents, its Disk and its Component.
    A component belongs to a volume.
    

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