Originally published: 2006-04-26 10:01:43
Last updated: 2006-04-26 10:01:43
Author: Stephen Chappell

Disk Abstraction Layer 3 provides a more useful framework for secondary memory and provides an abstract interface for implementing a generic file system. It renumbers the blocks on the hard drive to start at block 1 so that block 0 can be considered a NULL reference. At a lower level, block 0 would be seen to be where the OS can keep a seed for its random number generator (interface provided).