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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
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