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# The Software-RAID HOWTO

## Jakob Østergaard ( jakob@ostenfeld.dk)

v. 0.90.2 - Alpha, 27th february 1999

This HOWTO describes how to use Software RAID under Linux. You must be using the RAID patches available from ftp://ftp.fi.kernel.org/pub/linux/daemons/raid/alpha. The HOWTO can be found at http://ostenfeld.dk/~jakob/Software-RAID.HOWTO/.

## 1. Introduction

- 1.1 Disclaimer
- 1.2 Requirements

## 2. Why RAID ?

- 2.1 Technicalities
- 2.2 Terms
- 2.3 The RAID levels
- 2.4 Swapping on RAID

## 3. RAID setup

- 3.1 General setup
- 3.2 Linear mode
- 3.3 RAID-0
- 3.4 RAID-1
- 3.5 RAID-4
- 3.6 RAID-5
- 3.7 The Persistent Superblock
- 3.8 Chunk sizes
- 3.9 Options for mke2fs
- 3.10 Autodetection
- 3.11 Booting on RAID
- 3.12 Pitfalls

## 4. Credits

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