VERITAS File System 4.1 Administrator's Guide

VxFS Performance: Creating, Mounting, and Tuning File Systems
Choosing mount Command Options
Chapter 242
logiosize
The logiosize=size option is provided to enhance the performance of storage devices that
employ a read-modify-write feature. If you specify logiosize when you mount a file system,
VxFS writes the intent log in at least size bytes to obtain the maximum performance from
such devices. The values for size can be 1024, 2048, or 4096.