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Microsoft EFI FAT32 File System Specification

Updated: Dec 6, 2000

The FAT (File Allocation Table) file system has its origins in the late 1970s and early 1980s and was the file system supported by the Microsoft MS-DOS operating system. It was originally developed as a simple file system suitable for floppy disk drives less than 500K in size. Over time it has been enhanced to support larger and larger media. Currently there are three FAT file system types: FAT12, FAT16 and FAT32. The basic difference in these FAT sub types, and the reason for the names, is the size, in bits, of the entries in the actual FAT structure on the disk. There are 12 bits in a FAT12 FAT entry, 16 bits in a FAT16 FAT entry and 32 bits in a FAT32 FAT entry.

The Microsoft Extensible Firmware Initiative FAT32 File System Specification, rev. 1.03, Dec 6, 2000, is available as an Office Word document (268 KB).

Note: The download license agreement permits you to use the Microsoft EFI FAT32 File System Specification only in connection with a firmware implementation of the Extensible Firmware Initiative Specification, v. 1.0. If you plan to implement the FAT32 File System specification for other purposes, you must obtain an additional license from Microsoft. For example, you must obtain an additional license in order to create a file system for reading or reading and writing FAT32 in digital cameras recording to flash media, in computer operating systems reading and writing internal/external hard disks or flash media, or in set-top boxes reading FAT-formatted media. To obtain this additional license, see the Microsoft Intellectual Property Licensing page.

Please read the license agreement before continuing.


   MICROSOFT EFI FAT32 FILE SYSTEM SPECIFICATION
   LICENSE AGREEMENT

Microsoft Extensible Firmware Initiative FAT32 File System Specification

IMPORTANT-READ CAREFULLY: This Microsoft Agreement (“Agreement”) is a legal agreement between you (either an individual or a single entity) and Microsoft Corporation (“Microsoft”) for the version of the Microsoft specification identified above which you are about to download (“Specification”). BY DOWNLOADING, COPYING OR OTHERWISE USING THE SPECIFICATION, YOU AGREE TO BE BOUND BY THE TERMS OF THIS AGREEMENT. IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, DO NOT DOWNLOAD, COPY, OR USE THE SPECIFICATION.

The Specification is owned by Microsoft or its suppliers and is protected by copyright laws and international copyright treaties, as well as other intellectual property laws and treaties.

1. LIMITED LICENSE AND COVENANT NOT TO SUE.

(a) Provided that you comply with all terms and conditions of this Agreement and subject to the limitations in Sections 1(c) - (f) below, Microsoft grants to you the following non-exclusive, worldwide, royalty-free, non-transferable, non-sublicenseable license under any copyrights owned or licensable by Microsoft without payment of consideration to unaffiliated third parties, to reproduce the Specification solely for the purposes of creating portions of products which comply with the Specification in unmodified form.

(b) Provided that you comply with all terms and conditions of this Agreement and subject to the limitations in Sections 1(c) - (f) below, Microsoft grants to you the following non-exclusive, worldwide, royalty-free, non-transferable, non-sublicenseable, reciprocal limited covenant not to sue under its Necessary Claims solely to make, have made, use, import, and directly and indirectly, offer to sell, sell and otherwise distribute and dispose of portions of products which comply with the Specification in unmodified form.
For purposes of sections (a) and (b) above, the Specification is “unmodified” if there are no changes, additions or extensions to the Specification, and “Necessary Claims” means claims of a patent or patent application which are (1) owned or licenseable by Microsoft without payment of consideration to an unaffiliated third party; and (2) have an effective filing date on or before December 31, 2010, that must be infringed in order to make a portion(s) of a product that complies with the Specification. Necessary Claims does not include claims relating to semiconductor manufacturing technology or microprocessor circuits or claims not required to be infringed in complying with the Specification (even if in the same patent as Necessary Claims).

(c) The foregoing covenant not to sue shall not extend to any part or function of a product which (i) is not required to comply with the Specification in unmodified form, or (ii) to which there was a commercially reasonable alternative to infringing a Necessary Claim.

(d) Each of the license and the covenant not to sue described above shall be unavailable to you and shall terminate immediately if you or any of your Affiliates (collectively “Covenantee Party”) “Initiates” any action for patent infringement against: (x) Microsoft or any of its Affiliates (collectively “Granting Party”), (y) any customers or distributors of the Granting Party, or other recipients of a covenant not to sue with respect to the Specification from the Granting Party (“Covenantees”); or (z) any customers or distributors of Covenantees (all parties identified in (y) and (z) collectively referred to as “Customers”), which action is based on a conformant implementation of the Specification. As used herein, “Affiliate” means any entity which directly or indirectly controls, is controlled by, or is under common control with a party; and control shall mean the power, whether direct or indirect, to direct or cause the direction of the management or policies of any entity whether through the ownership of voting securities, by contract or otherwise. “Initiates” means that a Covenantee Party is the first (as between the Granting Party and the Covenantee Party) to file or institute any legal or administrative claim or action for patent infringement against the Granting Party or any of the Customers. “Initiates” includes any situation in which a Covenantee Party files or initiates a legal or administrative claim or action for patent infringement solely as a counterclaim or equivalent in response to a Granting Party first filing or instituting a legal or administrative patent infringement claim against such Covenantee Party.

(e) Each of the license and the covenant not to sue described above shall be conditioned on and limited to the sale, distribution, or other disposition of such compliant portions of products that are usable only by the firmware during the boot process and shall not extend to any purpose other than: (A) to create portions of an operating system (i) only as necessary to adapt such operating system so that it can directly interact with a firmware implementation of: Intel’s Extensible Firmware Initiative (EFI) Specification v. 1.0 and later, and the Unified Extensible Firmware Interface (UEFI) Forum’s UEFI Specifications v.2.0 and later  (together the “UEFI Specifications”); (ii) only as necessary to emulate an implementation of the UEFI Specifications; and (B) to create firmware, applications, utilities and/or drivers that will be used and/or licensed for only the following purposes: (i) to install, repair and maintain hardware, firmware and portions of operating system software which are utilized in the boot process; (ii) to provide to an operating system runtime services that are specified in the UEFI Specifications; (iii) to diagnose and correct failures in the hardware, firmware or operating system software; (iv) to query for identification of a computer system (whether by serial numbers, asset tags, user or otherwise); (v) to perform inventory of a computer system; and (vi) to manufacture, install and setup any hardware, firmware or operating system software.

(f) Microsoft reserves all other rights it may have in the Specification and any intellectual property therein. The furnishing of this document does not give you any license or covenant not to sue with respect to any other Microsoft patents, trademarks, copyrights or other intellectual property rights.

2. ADDITIONAL LIMITATIONS AND OBLIGATIONS.
(a)The foregoing license and covenant not to sue is applicable only to the version of the Specification which you are about to download. It does not apply to any additional versions of or extensions to the Specification.
(b)Without prejudice to any other rights, Microsoft may terminate this Agreement if you fail to comply with the terms and conditions of this Agreement. In such event you must destroy all copies of the Specification.

3. INTELLECTUAL PROPERTY RIGHTS. All ownership, title and intellectual property rights in and to the Specification are owned by Microsoft or its suppliers.

4. U.S. GOVERNMENT RIGHTS. Any Specification provided to the U.S. Government pursuant to solicitations issued on or after December 1, 1995 is provided with the commercial rights and restrictions described elsewhere herein. Any Specification provided to the U.S. Government pursuant to solicitations issued prior to December 1, 1995 is provided with RESTRICTED RIGHTS as provided for in FAR, 48 CFR 52.227-14 (JUNE 1987) or DFAR, 48 CFR 252.227-7013 (OCT 1988), as applicable.

5. EXPORT RESTRICTIONS. Export of the Specification, any part thereof, or any process or service that is the direct product of the Specification (the foregoing collectively referred to as the “Restricted Components”) from the United States is regulated by the Export Administration Regulations (EAR, 15 CFR 730-744) of the U.S. Commerce Department, Bureau of Export Administration (“BXA”). You agree to comply with the EAR in the export or re-export of the Restricted Components (i) to any country to which the U.S. has embargoed or restricted the export of goods or services, which currently include, but are not necessarily limited to Cuba, Iran, Iraq, Libya, North Korea, Sudan, Syria and the Federal Republic of Yugoslavia (including Serbia, but not Montenegro), or to any national of any such country, wherever located, who intends to transmit or transport the Restricted Components back to such country; (ii) to any person or entity who you know or have reason to know will utilize the Restricted Components in the design, development or production of nuclear, chemical or biological weapons; or (iii) to any person or entity who has been prohibited from participating in U.S. export transactions by any federal agency of the U.S. government. You warrant and represent that neither the BXA nor any other U.S. federal agency has suspended, revoked or denied your export privileges. For additional information see http://www.microsoft.com/exporting.

6. DISCLAIMER OF WARRANTIES. To the maximum extent permitted by applicable law, Microsoft and its suppliers provide the Specification (and all intellectual property therein) and any (if any) support services related to the Specification (“Support Services”) AS IS AND WITH ALL FAULTS, and hereby disclaim all warranties and conditions, either express, implied or statutory, including, but not limited to, any (if any) implied warranties or conditions of merchantability, of fitness for a particular purpose, of lack of viruses, of accuracy or completeness of responses, of results, and of lack of negligence or lack of workmanlike effort, all with regard to the Specification, any intellectual property therein and the provision of or failure to provide Support Services. ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT, QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT, WITH REGARD TO THE SPECIFICATION AND ANY INTELLECTUAL PROPERTY THEREIN. THE ENTIRE RISK AS TO THE QUALITY OF OR ARISING OUT OF USE OR PERFORMANCE OF THE SPECIFICATION, ANY INTELLECTUAL PROPERTY THEREIN, AND SUPPORT SERVICES, IF ANY, REMAINS WITH YOU.

7. EXCLUSION OF INCIDENTAL, CONSEQUENTIAL AND CERTAIN OTHER DAMAGES. To the maximum extent permitted by applicable law, in no event shall Microsoft or its suppliers be liable for any special, incidental, indirect, or consequential damages whatsoever (including, but not limited to, damages for loss of profits or confidential or other information, for business interruption, for personal injury, for loss of privacy, for failure to meet any duty including of good faith or of reasonable care, for negligence, and for any other pecuniary or other loss whatsoever) arising out of or in any way related to the use of or inability to use the SPECIFICATION, ANY INTELLECTUAL PROPERTY THEREIN, the provision of or failure to provide Support Services, or otherwise under or in connection with any provision of this AGREEMENT, even in the event of the fault, tort (including negligence), strict liability, breach of contract or breach of warranty of Microsoft or any supplier, and even if Microsoft or any supplier has been advised of the possibility of such damages.

8. LIMITATION OF LIABILITY AND REMEDIES. Notwithstanding any damages that you might incur for any reason whatsoever (including, without limitation, all damages referenced above and all direct or general damages), the entire liability of Microsoft and any of its suppliers under any provision of this Agreement and your exclusive remedy for all of the foregoing shall be limited to the greater of the amount actually paid by you for the Specification or U.S.$5.00. The foregoing limitations, exclusions and disclaimers shall apply to the maximum extent permitted by applicable law, even if any remedy fails its essential purpose.

9. APPLICABLE LAW. If you acquired this Specification in the United States, this Agreement is governed by the laws of the State of Washington. If you acquired this Specification in Canada, unless expressly prohibited by local law, this Agreement is governed by the laws in force in the Province of Ontario, Canada; and, in respect of any dispute which may arise hereunder, you consent to the jurisdiction of the federal and provincial courts sitting in Toronto, Ontario. If this Specification was acquired outside the United States, then local law may apply.

10.QUESTIONS. Should you have any questions concerning this Agreement, or if you desire to contact Microsoft for any reason, please contact the Microsoft subsidiary serving your country, or write: Microsoft Sales Information Center/One Microsoft Way/Redmond, WA 98052-6399.

11.ENTIRE AGREEMENT. This Agreement is the entire agreement between you and Microsoft relating to the Specification and the Support Services (if any) and they supersede all prior or contemporaneous oral or written communications, proposals and representations with respect to the Specification or any other subject matter covered by this Agreement. To the extent the terms of any Microsoft policies or programs for Support Services conflict with the terms of this Agreement, the terms of this Agreement shall control.

Si vous avez acquis votre produit Microsoft au CANADA, la garantie limitée suivante vous concerne :

RENONCIATION AUX GARANTIES. Dans toute la mesure permise par la législation en vigueur, Microsoft et ses fournisseurs fournissent la Specification (et à toute propriété intellectuelle dans celle-ci) et tous (selon le cas) les services d’assistance liés à la Specification (“Services d’assistance”) TELS QUELS ET AVEC TOUS LEURS DÉFAUTS, et par les présentes excluent toute garantie ou condition, expresse ou implicite, légale ou conventionnelle, écrite ou verbale, y compris, mais sans limitation, toute (selon le cas) garantie ou condition implicite ou légale de qualité marchande, de conformité à un usage particulier, d’absence de virus, d’exactitude et d’intégralité des réponses, de résultats, d’efforts techniques et professionnels et d’absence de négligence, le tout relativement à la Specification, à toute propriété intellectuelle dans celle-ci et à la prestation ou à la non-prestation des Services d’assistance. DE PLUS, IL N’Y A AUCUNE GARANTIE ET CONDITION DE TITRE, DE JOUISSANCE PAISIBLE, DE POSSESSION PAISIBLE, DE SIMILARITÉ À LA DESCRIPTION ET D’ABSENCE DE CONTREFAÇON RELATIVEMENT À LA SPÉCIFICATION ET À TOUTE PROPRIÉTÉ INTELLECTUELLE DANS CELLE-CI. VOUS SUPPORTEZ TOUS LES RISQUES DÉCOULANT DE L’UTILISATION ET DE LA PERFORMANCE DE LA SPÉCIFICATION ET DE TOUTE PROPRIÉTÉ INTELLECTUELLE DANS CELLE-CI ET CEUX DÉCOULANT DES SERVICES D’ASSISTANCE (S’IL Y A LIEU).

EXCLUSION DES DOMMAGES INDIRECTS, ACCESSOIRES ET AUTRES. Dans toute la mesure permise par la législation en vigueur, Microsoft et ses fournisseurs ne sont en aucun cas responsables de tout dommage spécial, indirect, accessoire, moral ou exemplaire quel qu’il soit (y compris, mais sans limitation, les dommages entraînés par la perte de bénéfices ou la perte d’information confidentielle ou autre, l’interruption des affaires, les préjudices corporels, la perte de confidentialité, le défaut de remplir toute obligation y compris les obligations de bonne foi et de diligence raisonnable, la négligence et toute autre perte pécuniaire ou autre perte de quelque nature que ce soit) découlant de, ou de toute autre manière lié à, l’utilisation ou l’impossibilité d’utiliser la Spécification, toute propriété intellectuelle dans celle-ci, la prestation ou la non-prestation des Services d’assistance ou autrement en vertu de ou relativement à toute disposition de cette convention, que ce soit en cas de faute, de délit (y compris la négligence), de responsabilité stricte, de manquement à un contrat ou de manquement à une garantie de Microsoft ou de l’un de ses fournisseurs, et ce, même si Microsoft ou l’un de ses fournisseurs a été avisé de la possibilité de tels dommages.

LIMITATION DE RESPONSABILITÉ ET RECOURS. Malgré tout dommage que vous pourriez encourir pour quelque raison que ce soit (y compris, mais sans limitation, tous les dommages mentionnés ci-dessus et tous les dommages directs et généraux), la seule responsabilité de Microsoft et de ses fournisseurs en vertu de toute disposition de cette convention et votre unique recours en regard de tout ce qui précède sont limités au plus élevé des montants suivants: soit (a) le montant que vous avez payé pour la Spécification, soit (b) un montant équivalant à cinq dollars U.S. (5,00 $ U.S.). Les limitations, exclusions et renonciations ci-dessus s’appliquent dans toute la mesure permise par la législation en vigueur, et ce même si leur application a pour effet de priver un recours de son essence.

DROITS LIMITÉS DU GOUVERNEMENT AMÉRICAIN
Tout Produit Logiciel fourni au gouvernement américain conformément à des demandes émises le ou après le 1er décembre 1995 est offert avec les restrictions et droits commerciaux décrits ailleurs dans la présente convention. Tout Produit Logiciel fourni au gouvernement américain conformément à des demandes émises avant le 1er décembre 1995 est offert avec des DROITS LIMITÉS tels que prévus dans le FAR, 48CFR 52.227-14 (juin 1987) ou dans le FAR, 48CFR 252.227-7013 (octobre 1988), tels qu’applicables.
Sauf lorsqu’expressément prohibé par la législation locale, la présente convention est régie par les lois en vigueur dans la province d’Ontario, Canada. Pour tout différend qui pourrait découler des présentes, vous acceptez la compétence des tribunaux fédéraux et provinciaux siégeant à Toronto, Ontario.

Si vous avez des questions concernant cette convention ou si vous désirez communiquer avec Microsoft pour quelque raison que ce soit, veuillez contacter la succursale Microsoft desservant votre pays, ou écrire à: Microsoft Sales Information Center, One Microsoft Way, Redmond, Washington 98052-6399.


   

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