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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$Id: vmdb.html,v 1.1 2001/05/30 20:25:10 flatcap Exp $