Changes between Version 6 and Version 7 of TBR/UserManual/RTEMS_File_System


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Timestamp:
Feb 23, 2010, 7:36:18 AM (10 years ago)
Author:
ChrisJohns
Comment:

/* =Groups */

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  • TBR/UserManual/RTEMS_File_System

    v6 v7  
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    2323</blockquote>
    24 == Groups===
     24== Groups ==
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    2626A group is broken up into the block allocation bitmap the inode allocation bitmap, the inodes, and the data blocks.
     
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    4141The block bitmap contains a single bit for every block in a group. The default format is to allocate the size of a group based on the number of bits that fit into a single block. For example a block of 1024 bytes has 8,192 bits therefore a group can have 8192 blocks including the block bitmap block. The inode bitmap has a bit for ever inode in the group. An inode is the information about a node on the disk. A node is the data that links the elements of the disk together to create directories, files, and nodes as well as hold times and flags. The number of inodes in a group is a format configuration parameter. The default is use 1% of the disk's blocks for inode data. Again with a 1024 byte block size there are 18 inodes per block and 1448 inodes per group. Inodes do not span block boundaries.
    42 
    43  ==Inodes====
     42== Inodes ==
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