October 2000
Intermediate to advanced
704 pages
18h 44m
English
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14.2. UFS On-Disk Format
The on-disk format of the UFS file system has largely remained unchanged with the introduction of new features, maintaining forward compatibility across all releases. This allows Solaris to be upgraded without the need to back up and restore file systems.
14.2.1. UFS Inodes
Information about which data blocks relate to each file are stored in a special file index node: the inode. The inode contains all of the information about the file, except for the file name, which is stored in the directory. Inode information includes:
File type (regular, special, fifo, link, etc.)
Owner of file (uid)
Group of file (gid)
File size
Attributes (read, execute, modify)
Timestamps (last modified, etc.)
Number of references to the file (links) ...
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