(Answer) (Category) SCO(Caldera) UnixWare 7/OpenUNIX 8 FAQ : (Category) General Information :
What's an inode?
An inode is a data structure that contains information about a file. An inode is similar to a card in the card-catalog of a library. But instead of keeping track of the Title, Author and Dewey Decimal System number, inodes keep track of:

     * mode                       -  d,l,c,b  (Directory, Link, Device Files)
     * link count                 -  the number of hard links to the file
     * owner                      -
     * group                      -
     * size in bytes              -
     * time stamps                -  mtime, ctime, atime
     * data block addresses       -  Pointers to the real data


   You can see how an inodes points to a file in a filesystem, just as a
   Table of Contents entry points to a chapter in a book, or a cardfile
   from a card-catalog points to the area of the Library by Dewey number.

      * Each filesystem has one set of inodes like there is one
        card-catalog in each libaray.
* Inodes are referred to by numbers starting from 2.
* There has been historically a limit of 64K inodes per filesystem, and we had to watch out that we didn't create too many files. Not anymore.
* You have unlimited inodes on vxfs filesystems.
* Each file has an inode assigned to it when it is created.


<mschalit@pacbell.net>
gerberb@zenez.com

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