ufs storage blocks
The rest of the space allocated to the filesystem
is occupied by storage blocks, also called data blocks.
The size of these storage blocks is determined at the time
a filesystem is created
and can be 2048, 4096, or 8192 bytes.
Because of these large block sizes and the potential for
waste with small files,
also has a subdivision of a block called a ``fragment''.
When a filesystem is created,
the fragment size must match or be smaller than
the block size:
you can set it to 512, 1024, 2048, or 4096 bytes.
Fragments of 1024 bytes are the most commonly employed.
For a regular file, the storage blocks
contain the contents of the file.
For a directory, the storage blocks contain
entries that give the inode number and the filename.
filenames can be up to 255 bytes long.
Each entry represents
a file or subdirectory that is a member of the directory.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004