AIX 5L Problem Determination - IBM Redbooks

Function JFS2 JFS
Compression No Yes
Default ownership at creation root.system sys.sys
SGID of default file mode SGID=off SGID=on
Quotas No Yes
Extended ACL Yes Yes
Note: The JFS2 file systems must have a JFS2 log device. By default, it is
named jfs2log.
7.4.9 The /proc file system
AIX 5L provides support of the /proc file system. This pseudo file system maps
processes and kernel data structures to corresponding files. The output of the
mount and df commands showing /proc is provided in the following examples:
# mount
node mounted mounted over vfs date options
-------- --------------- --------------- ------ ------------ ---------------
/dev/hd4 / jfs Sep 11 16:52 rw,log=/dev/hd8
/dev/hd2 /usr jfs Sep 11 16:52 rw,log=/dev/hd8
/dev/hd9var /var jfs Sep 11 16:52 rw,log=/dev/hd8
/dev/hd3 /tmp jfs Sep 11 16:52 rw,log=/dev/hd8
/dev/hd1 /home jfs Sep 11 16:53 rw,log=/dev/hd8
/proc /proc procfs Sep 11 16:53 rw
# df
Filesystem 512-blocks Free %Used Iused %Iused Mounted on
/dev/hd4 65536 27760 58% 2239 14% /
/dev/hd2 1507328 242872 84% 22437 12% /usr
/dev/hd9var 32768 16432 50% 448 11% /var
/dev/hd3 557056 538008 4% 103 1% /tmp
/dev/hd1 32768 31608 4% 47 2% /home
/proc - - - - - /proc
The entry in the /etc/vfs file appears as follows:
# lsvfs procfs
procfs 6 none none
Each process is assigned a directory entry in the /proc file system with a name
identical to its process ID. In this directory, several files and subdirectories are
created corresponding to internal process control data structures. Most of these
162 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques