Difference between revisions of "Xv Fat Discussion"

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Table Of Contents
 
 
 
== xvFat Discussion ==
 
== xvFat Discussion ==
 
=== General Introduction ===
 
=== General Introduction ===
 +
 
This is a memorandum page for the discussion about the xvFAT File System which enables the stable operation of the removable mass media on USB.  Because of the interoperability with the PC, FAT will be an useful file system. However the Linux implementation of the file system is not taking account of the stable operation of the system when it is used for the removable media.  In the worst case, Linux system would be panicked when it is removed inadequately.
 
This is a memorandum page for the discussion about the xvFAT File System which enables the stable operation of the removable mass media on USB.  Because of the interoperability with the PC, FAT will be an useful file system. However the Linux implementation of the file system is not taking account of the stable operation of the system when it is used for the removable media.  In the worst case, Linux system would be panicked when it is removed inadequately.
  
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Here, you may find the introduction of the XvFat.
 
Here, you may find the introduction of the XvFat.
- English : [[Media:20050325-xvfat-intro-en.pdf]]
+
* English : [[Media:20050325-xvfat-intro-en.pdf]]
  - Thanks to Mr. Asai's (IBM) cooperation in translating it into English.
+
** Thanks to Mr. Asai's (IBM) cooperation in translating it into English.
- Japanese : [[Media:20050325-xvfat-intro-jpn.pdf]]
+
* Japanese : [[Media:20050325-xvfat-intro-jpn.pdf]]
 +
 
 
== Mailing List ==
 
== Mailing List ==
- A mailing list is prepared for this discussion.
+
* A mailing list is prepared for this discussion.
  - '''Note:''' Messages in Japanese is allowed however for the convenience of non Japanese speakers, please add slight summary of the message in English.  
+
** '''Note:''' Messages in Japanese is allowed however for the convenience of non Japanese speakers, please add slight summary of the message in English.  
- Please register '''sig_xvfat@tree.celinuxforum.org''' ;)
+
* Please register '''sig_xvfat@tree.celinuxforum.org''' ;)
  - Registration Site [http://tree.celinuxforum.org/mailman/listinfo/sig_xvfat http://tree.celinuxforum.org/mailman/listinfo/sig_xvfat]
+
** Registration Site [http://tree.celinuxforum.org/mailman/listinfo/sig_xvfat http://tree.celinuxforum.org/mailman/listinfo/sig_xvfat]
  - '''Non CE Linux Forum Members are also welcomed'''
+
** '''Non CE Linux Forum Members are also welcomed'''
  
 
== Sony Hosted Technical Meeting in Yokohama (20 May 2005) ==
 
== Sony Hosted Technical Meeting in Yokohama (20 May 2005) ==
 
=== Why FAT? ===
 
=== Why FAT? ===
- FAT can be used for both CE products and PC commonly, which may prevent the user confusion.
+
* FAT can be used for both CE products and PC commonly, which may prevent the user confusion.
  
 
=== Problem of the FAT for Removable Media ===
 
=== Problem of the FAT for Removable Media ===
- We knew that in such condition that when the user plug off the device while OS is writing the data to the media, in the worst case the OS fall to "Panic".  It will never be allowed by the users.
+
* We knew that in such condition that when the user plug off the device while OS is writing the data to the media, in the worst case the OS fall to "Panic".  It will never be allowed by the users.
- Our users may allow the data is not saved when the media is removed while data writing.
+
* Our users may allow the data is not saved when the media is removed while data writing.
  - But we have to be careful that those requirements may be vary to the products.
+
** But we have to be careful that those requirements may be vary to the products.
  
 
=== Presentation Material ===
 
=== Presentation Material ===
- By Machida san of Sony is here.  
+
* By Machida san of Sony is here.  
  - The material is here :
+
** The material is here :
  - [[Media:20050520-xvfat-discussion-1.pdf]] (Japanese)
+
*** [[Media:20050520-xvfat-discussion-1.pdf]] (Japanese)
  - [[Media:20050520-xvfat-discussion-en.pdf]] (English)
+
*** [[Media:20050520-xvfat-discussion-en.pdf]] (English)
- At the [[International Technical Jamboree]] on 14th June, 2005
+
** At the [[International Technical Jamboree]] on 14th June, 2005
  - [[Media:20050614-celf-xvfs.pdf]]
+
*** [[Media:20050614-celf-xvfs.pdf]]
  
 
=== To do items ===
 
=== To do items ===
- Sony is going to isolate the improvement and split it into the elements for the acceptation to the master kernel.
+
* Sony is going to isolate the improvement and split it into the elements for the acceptation to the master kernel.
  
 
== The Fire Leaped to ... ==
 
== The Fire Leaped to ... ==
 
=== Please pay attention to ===
 
=== Please pay attention to ===
- http://www.linuxdevices.com/news/NS9955450995.html
+
 
- http://hardware.slashdot.org/article.pl?sid=05/06/07/0314221&from=rss
+
* http://www.linuxdevices.com/news/NS9955450995.html
  - Slash Dot...
+
* http://hardware.slashdot.org/article.pl?sid=05/06/07/0314221&from=rss
 +
** Slash Dot...
  
 
== Patch for 2.4.20 for your reference ==
 
== Patch for 2.4.20 for your reference ==
 
[[Media:20050715-xvfat-2.4.20.patch]]
 
[[Media:20050715-xvfat-2.4.20.patch]]

Revision as of 03:48, 6 March 2007

xvFat Discussion

General Introduction

This is a memorandum page for the discussion about the xvFAT File System which enables the stable operation of the removable mass media on USB. Because of the interoperability with the PC, FAT will be an useful file system. However the Linux implementation of the file system is not taking account of the stable operation of the system when it is used for the removable media. In the worst case, Linux system would be panicked when it is removed inadequately.

On 25th May 2005, Sony have called for the private technical discussion on this technology. Sony showed their improvement of the FAT file system to make it "Panic Free" in most case of the user operation of removing media.

Notice to non Japanese speakers : We sincerely apologize to whom may not to be convenient in making conversation in Japanese. This session may include many discussion in Japanese.

Here, you may find the introduction of the XvFat.

Mailing List

  • A mailing list is prepared for this discussion.
    • Note: Messages in Japanese is allowed however for the convenience of non Japanese speakers, please add slight summary of the message in English.
  • Please register sig_xvfat@tree.celinuxforum.org ;)

Sony Hosted Technical Meeting in Yokohama (20 May 2005)

Why FAT?

  • FAT can be used for both CE products and PC commonly, which may prevent the user confusion.

Problem of the FAT for Removable Media

  • We knew that in such condition that when the user plug off the device while OS is writing the data to the media, in the worst case the OS fall to "Panic". It will never be allowed by the users.
  • Our users may allow the data is not saved when the media is removed while data writing.
    • But we have to be careful that those requirements may be vary to the products.

Presentation Material

To do items

  • Sony is going to isolate the improvement and split it into the elements for the acceptation to the master kernel.

The Fire Leaped to ...

Please pay attention to

Patch for 2.4.20 for your reference

Media:20050715-xvfat-2.4.20.patch