Linux in a Nutshell, Fourth Edition

Name

elvtune

Synopsis

                  elvtune [options] devices
               

System administration command. Set the latency in the elevator algorithm used to schedule I/O activities for the specified block devices. If no options are given, print the current settings for devices.

Options

-b N

Set the maximum coalescing factor allowed on writes when reads are pending to N.

-h

Print help message, then exit.

-r N

Set the maximum read latency (basically, the number of sectors to read before writes are allowed) to N. The default is 8192.

-v

Print version number, then exit.

-w N

Set the maximum write latency (sectors to write before allowing a read) to N. The default is 16384.