VERITAS File SystemÖ 3.5 (HP OnlineJFS/JFS3.5) AdministratorÆs Guide (December 2002)

Chapter 2
VxFS Performance: Creating, Mounting, and Tuning File Systems
Choosing mount Command Options
24
qlog
The qlog option can be used in conjunction with the name of a QuickLog device. For example, to set the
QuickLog device vxlog1 to log the file system, use qlog=vxlog1. If qlog= is specified with no QuickLog
device, the QuickLog driver chooses an appropriate log device automatically. For more information, see
“VERITAS QuickLog” on page 87.
Mounting a File System with Large Files
If a mount succeeds and nolargefiles is specified, the file system cannot contain or create any large files. If
a mount succeeds and largefiles is specified, the file system may contain and create large files.
The mount command fails if the specified largefiles|nolargefiles option does not match the on-disk flag.
The mount command defaults to match the current setting of the on-disk flag if specified without the
largefiles or nolargefiles option, so it’s best not to specify either option. After a file system is mounted, you can
use the fsadm utility to change the large files option.
Managing a File System with Large Files
You can determine the current status of the largefiles flag using the fsadm command:
# mkfs -F vxfs -m special_device
# fsadm -F vxfs mount_point | special_device
You can switch capabilities on a mounted file system using the fsadm command:
# fsadm -F vxfs -o [no]largefiles mount_point
You can also switch capabilities on an unmounted file system:
# fsadm -F vxfs -o [no]largefiles special_device
You cannot change a file system to nolargefiles if it holds large files.
See the mount_vxfs (1M), fsadm_vxfs (1M), and mkfs_vxfs (1M) manual pages.