The s5 superblock
Much of the information about the filesystem
is stored in the superblock, including:
-
filesystem size and status
-
label (filesystem name)
-
size in logical blocks
-
read-only flag
-
superblock modified flag
-
date and time of last update
-
inodes
-
total number of inodes allocated
-
number of free inodes
-
array of 100 free inode numbers
-
an index into the array of free inode numbers
-
storage blocks
-
total number of free blocks
-
array of 50 free block numbers
-
an index into the array of free block numbers
NOTE:
The superblock does not maintain
complete lists of free inodes and free blocks,
but only enough to meet
current demands as the filesystem is used.
At almost any time, unless the filesystem is
close to running out of inodes and storage blocks, there
are sure to be more free inodes and free blocks
than are listed in the superblock.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004