HP JFS 3.3 and HP OnLineJFS 3.3 VERITAS File System 3.3 System Administrator's Guide

60 Chapter2
Disk Layout
The VxFS Version 2 Disk Layout
Figure 2-6 Fileset Header File
The fileset header for a given fileset includes information such as:
• the fileset index (1 for the attribute fileset and 999 for the primary
fileset)
• the fileset name
• the inode numbers of the fileset’s inode list file and its replica
• the total number of allocated inodes
• the maximum number of inodes allowed in the fileset
• the inode list extent size (in blocks)
• the inode number of the file containing the inode allocation units for
the fileset
• the inode number of the fileset’s link count table (attribute fileset
only)
• the inode number of the fileset’s quotas file (primary fileset only)
Inodes
An inode is a data structure that contains information about a file. The
VxFS inode size is 256 bytes. Each inode stores information about a
particular file such as:
• file length
• link count
• owner and group IDs
• access privileges
Attribute Fileset Header Entry
Primary Fileset Header Entry
. . .