The Quick I/O feature can be enabled/disabled when the filesystem is being mounted. It can also be enabled or disabled online on a filesystem, which was mounted with the
Quick I/O feature, without unmounting thefile system.

The mount command has the following option to disable QuickI/O:

noqio - Disables theVERITAS Quick I/O for Databases option for the given file system. If noqio isspecified, mount disables Quick I/O even if the license is installed.

Thefollowing command can be used to disable Quick I/O when mounting a filesystem:

# mount -F vxfs -o noqio

Forexample:

# mount -F vxfs -o noqio/dev/vx/dsk/testdg/testvol1/testvol1

Note:
If the Quick I/O feature islicensed and installed, Quick I/O is enabled by default when a file system ismounted. So, if there is a need for Quick I/O to be disabled, use the abovemount option ' -o noqio ' duringmount.


To disable the Quick I/O feature for an already mounted filesystem with the Quick I/O feature enabled, remount the VxFS file system usingthe '-o noqio' mount option:

# mount -F vxfs-o remount,noqio

Forexample, to remount the file system mounted with Quick I/O option at/testvol1,  now with Quick I/O disabled,type:

# mount -F vxfs -o remount,noqio/dev/vx/dsk/testdg/testvol1 /testvol1