VERITAS File System 3.5 (HP OnlineJFS/JFS 3.5) Administrator's Guide (August 2003)

Appendix A
VERITAS File System Quick Reference
Mounting a File System
78
Mount Options
The mount command has numerous options to tailor a file system for various functions and environments.
Some specific_options are listed below.
• Security feature
If security is important, use blkclear to ensure that deleted files are completely erased before the space
is reused.
• Support for large files
If you specify the largefiles option, you can create files larger than two gigabytes on the file system.
• Support for cluster file systems
If you specify the cluster option, the file system is mounted in shared mode. Cluster file systems depend
on several other VERITAS products that must be correctly configured before a complete clustering
environment is enabled.
• News file systems
If you are using cnews, use delaylog (or tmplog), mincache=closesync because cnews does an fsync()
on each news file before marking it received. The fsync() is performed synchronously as required, but
other options are delayed.
• Temporary file systems
For a temporary file system such as /tmp, where performance is more important than data integrity, use
tmplog, mincache=tmpcache.
See “Choosing mount Command Options” on page 31 and the following manual pages for more information
about the mount command and its available options:
fstab (4)
fsckptadm (1M)
mount (1M)
mount_vxfs (1M)
Example To mount the file system /dev/vx/dsk/fsvol/vol1 on the /ext directory with read/write access
and delayed logging, enter:
# mount -F vxfs -o delaylog /dev/vx/dsk/fsvol/vol1 /ext
How to Edit the fstab File
You can edit the /etc/fstab file to automatically mount a file system at boot time. You must specify:
• the special block device name to mount
• the mount point
• the file system type (vxfs)
• the mount options
• the backup frequency
• which fsck pass looks at the file system
Each entry must be on a single line. See the fstab (4) manual page for more information about the
/etc/fstab file format.