dosFs for Tornado 2.0
Release Notes and Supplement
2.0
Edition 1
™
Copyright 1984 – 1999 Wind River Systems, Inc.
ALL RIGHTS RESERVED. No part of this publication may be copied in any form, by photocopy,
microfilm, retrieval system, or by any other means now known or hereafter invented without the
prior written permission of Wind River Systems, Inc.
VxWorks, IxWorks, Wind River Systems, the Wind River Systems logo, wind, and Embedded Internet
are registered trademarks of Wind River Systems, Inc. Tornado, CrossWind, HTMLWorks, MotorWorks,
Personal JWorks, VxMP, VxSim, VxVMI, VxFusion, WindC++, WindConfig, Wind Foundation Classes,
WindNet, WindPower, WindSh, and WindView are trademarks of Wind River Systems, Inc.
All other trademarks used in this document are the property of their respective owners.
Corporate Headquarters
Wind River Systems, Inc.
500 Wind River Way
Alameda, CA 94501-1153
USA
toll free (
US): 800/545-WIND
telephone: 510/748-4100
facsimile: 510/749-2010
Europe
Wind River Systems, S.A.R.L.
19, Avenue de Norvège
Immeuble B4, Bâtiment 3
Z.A. de Courtaboeuf 1
91953 Les Ulis Cédex
FRANCE
telephone: 33-1-60-92-63-00
facsimile: 33-1-60-92-63-15
Japan
Wind River Systems K.K.
Ebisu Prime Square Tower 5th Fl.
1-1-39 Hiroo
Shibuya-ku
Tokyo 150-0012
JAPAN
telephone: 81-3-5778-6001
facsimile: 81-3-5778-6002
dosFs for Tornado 2.0 Release Notes and Supplement, 2.0
Edition 1
24 Nov 99
Part #: DOC-13246-ZD-00
CUSTOMER SUPPORT
Telephone E-mail Fax
Corporate: 800/872-4977 toll free, U.S. & Canada
510/748-4100 direct
support@wrs.com 510/749-2164
Europe: 33-1-69-07-78-78 support@wrsec.fr 33-1-69-07-08-26
Japan: 011-81-3-5467-5900 support@kk.wrs.com 011-81-3-5467-5877
If you purchased your Wind River Systems product from a distributor, please contact your
distributor to determine how to reach your technical support organization.
Please provide your license number when contacting Customer Support.
iii
Contents
1. Introduction ........................................................................................................ 1
2. Documentation ................................................................................................... 2
3. Summary of Changes ........................................................................................ 3
4. Backward Compatibility .................................................................................... 4
5. Installation .......................................................................................................... 5
6. Project Facility Components ............................................................................ 6
7. Supported Disk Formats ................................................................................... 8
The File Allocation Table (FAT) Format ........................... 9
Directory Format ................................................................. 9
8. The Disk Cache .................................................................................................. 10
9. Removable Disks ............................................................................................... 11
10. The CBIO Interface ............................................................................................ 12
11. Initializing a Volume .......................................................................................... 12
12. Disk Partition Manager ...................................................................................... 14
dosFs for Tornado 2.0 2.0
Release Notes and Supplement
iv
13. Formatting Volumes .......................................................................................... 24
14. Crash Recovery and Volume Consistency ...................................................... 24
15. Disk Space Allocation Policy ........................................................................... 25
16. PCMCIA Updates ............................................................................................... 27
17. Unsupported Code ............................................................................................ 27
18. Performance Issues .......................................................................................... 28
19. Known Problems ............................................................................................... 28
20. Fixed Problems .................................................................................................. 33
1
dosFs for Tornado 2.0
Release Notes and Supplement
1. Introduction
This component release of dosFs for Tornado 2.0 provides a new implementation
of the MS-DOS-compatible file system used with Tornado. This release includes
new file system features and discontinues others that are available with Tornado
2.0 and earlier versions of the VxWorks operating system.
The purpose of the dosFs file system remains essentially the same—to provide a
hierarchical arrangement of files and directories to a variety of media— however,
the way that the file system functions has changed because it relies on a new
internal implementation that is explained in this component release supplement.
This document provides information specific to the migration of dosFs 2.0 to your
development environment. It includes the following topics:
■
Documentation. A brief introduction to documentation important to dosFs 2.0.
■
Summary of Changes. New features, discontinued features, and other
modifications to the dosFs file system.
■
Backward Compatibility. The degreeto which dosFs 2.0 works compatibly with
initialization files of applications designed for previous versions of the dosFs
file system.
■
Installation. Release-specific information concerning installation of the
component.
■
dosFs 2.0 Project Facility Components. New Tornado 2.0 project facility
components ascociated with dosFs 2.0
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