Veritas File System 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

VERITAS File System Quick Reference
Veritas File System Quick Reference
Appendix A 173
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. The
default option is largefiles.
• 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.
• Using Storage Checkpoints
The ckpt=checkpoint_name option mounts a Storage Checkpoint of a mounted file system that was
previously created by the fsckptadm command.
• Using databases
If you are using databases with VxFS and if you have installed a license key for the VERITAS Quick
I/O for Databases feature, the mount command enables Quick I/O by default (the same as specifying the
qio option). The noqio option disables Quick I/O. If you do not have Quick I/O, mount ignores the qio
option. Alternatively, you can increase database performance using the mount option
convosync=direct, which utilizes direct I/O. See “Quick I/O Functionality and Performance” on
page 145 for more information.
• 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 28” and the following manual pages for more
information about the mount command and its available options:
• fstab(4)