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# UMSDOS HOW-TO

## Jacques Gelinas, `jacques@solucorp.qc.ca`

v1.2, 2001-12-01

Umsdos is a linux file system. It provide an alternative to the EXT2 file-system. Its main goal is to achieve easier coexistence with Ms-DOS data by sharing the same partition. This document explain first how to use Umsdos in different configuration, and later explain its operation and try to provide some information letting you decide if it is a good choice for you (see UMSDOS-WHY-TO at the end).

## 1. Copyright and License

## 2. UMSDOS: Where is it ?

- 2.1 Copyright and License
- 2.2 History
- 2.3 Availability
- 2.4 Distribution supporting it
- 2.5 Home site
- 2.6 Technical documentation
- 2.7 Who wrote it

## 3. Umsdos as your root partition

- 3.1 The pseudo-root concept.
- 3.2 Things to know about the pseudo-root

## 4. Different topics about the operation of Umsdos

- 4.1 Mount option
- 4.2 How to set defaults for the root
- 4.3 To swap or not to swap

## 5. How to boot a Umsdos system

- 5.1 Loadlin
- 5.2 From a floppy
- 5.3 LILO
- 5.4 How to defragment a Umsdos partition
- 5.5 Advance tricks

## 6. Basic principle

- 6.1 Introduction
- 6.2 Umsdos can replace the Ms-DOS file-system.
- 6.3 Directory promotion
- 6.4 How to promote: `/sbin/umssync`
- 6.5 Using `/sbin/umssync` at boot time
- 6.6 How to UN-promote
- 6.7 What about files created during a DOS session ?

## 7. Installation/UN-installation and some tricks

- 7.1 The pseudo-root `/mnt/linux`
- 7.2 Preparing `/mnt/linux`
- 7.3 Making sure `/mnt/linux` is correctly setup
- 7.4 Oops releasing pseudo root ...
- 7.5 How to UN-install a Umsdos system
- 7.6 Moving a Umsdos system to another DOS drive
- 7.7 About installing 50 Umsdos systems.

## 8. Setting a Linux section in a DOS partition

## 9. UMSDOS-WHY-TO

- 9.1 The goal of Umsdos
- 9.2 Who needs it
- 9.3 Performance issue

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