Live file system

from Wikipedia, the free encyclopedia

The Live File System (LFS, German and Live File System ) is a by Microsoft for the operating systems Windows Vista and Windows 7 designed file system that the Universal Disk Format implemented (UDF) versions 2.1 to 5.2. It is the preset file system for writing CDs or DVDs in all Windows versions from Vista onwards, but the classic ISO 9660 can still be selected before starting the writing process.

technology

Like the underlying UDF standard, LFS is intended for writable optical data carriers. In contrast to ISO 9660, data is not first compiled and then written, but the data can be transferred incrementally to the medium. It is similar to the ISO 9660 multisession CDs in this regard, but avoids some of the limitations.

Due to the similarity of the internal structure to the Unix file system and the referencing of the data blocks with inodes , the operating system can also write media that can only be written once (e.g. CD-R , DVD-R ) such as a multi-write medium (e.g. USB Stick ), but this reduces the available capacity as the original block cannot be overwritten. For a changed data block only the referencing has to be adapted. Files can only be completely erased or overwritten using rewritable data carriers (e.g. CD-RW , DVD-RW ).

As with the ISO-9660 format, the media cannot be read if the write process is not complete. This can happen especially if the medium is to be ejected too early.

The data carrier can only be read on other computers after the session has been closed ( finalizing ).

compatibility

According to Microsoft, the live file system is only compatible with Microsoft Windows XP and later versions of the Microsoft Windows operating system . Other operating systems are not supported. Due to the incompatibility with older Windows versions, Microsoft offers a decision guide for its use.

LFS does not implement the access control lists provided for in the UDF standard and an implementation is also not planned.

See also

Web links

Individual evidence

  1. ↑ Format a CD or DVD. In: Windows Vista Help & How-to. Microsoft Corporation, accessed May 4, 2010 .
  2. ^ Greg Shultz: Take advantage of Vista's Live File System optical disc format. (No longer available online.) In: Window on Windows. September 20, 2007, archived from the original on October 9, 2007 ; accessed on May 4, 2010 (English). Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  @1@ 2Template: Webachiv / IABot / blogs.techrepublic.com.com
  3. ↑ An optical disc appears to be blank after you format the disc by using the Live File System component on a Windows Vista-based computer. In: Microsoft Support. Microsoft Corporation, May 15, 2008, accessed May 4, 2010 .
  4. ↑ Which CD or DVD format should I use? In: Windows Vista Help & How-to. Microsoft Corporation, accessed April 10, 2010 .
  5. ↑ Will Vista honor ACL's in UDF file system? In: Windows Vista Help & How-to. Microsoft Corporation, accessed April 10, 2010 .