Home - LDM Documentation

Overview

All old PCs relied on a simple partioning scheme for disks. Four primary partitions, or three and and extended partition. Windows 2000 departed from this model when it introduced LDM. The Logical Disk Manager (LDM) is a database showing in detail which partitions are in use by which filesystems. The new system has no real limits.

Windows Dynamic Disks

read partition read privhead locate db (size & off) compare privhead & mirror use tocs to locate vmdb, etc

partitions stored in database at end of disk

Layout

    physical disk
    partition table
      privhead

    partition

    ldm database
      tocblock
      tocblock
      vmdb
      vblk
      klog
      klog
      privhead
      tocblock
      tocblock
      privhead
    

    LDM database same on each disk
    

    Mirrors, Stripes, Spanned, Raid, superimposed upon
    the LDM
    

    Automatic naming of components, partitions, disks, etc
    e.g. Disk6-01