Chapter 20 GEOM: Modular Disk Transformation Framework

Table of Contents
20.1 Synopsis
20.2 GEOM Introduction
20.3 RAID0 - Striping
20.4 RAID1 - Mirroring
20.5 RAID3 - Byte-level Striping with Dedicated Parity
20.6 GEOM Gate Network Devices
20.7 Labeling Disk Devices
20.8 UFS Journaling Through GEOM
Written by Tom Rhodes.

20.1 Synopsis

This chapter covers the use of disks under the GEOM framework in FreeBSD. This includes the major RAID control utilities which use the framework for configuration. This chapter will not go into in depth discussion on how GEOM handles or controls I/O, the underlying subsystem, or code. This information is provided through the geom(4) manual page and its various SEE ALSO references. This chapter is also not a definitive guide to RAID configurations. Only GEOM-supported RAID classifications will be discussed.

After reading this chapter, you will know:

Before reading this chapter, you should: