Linux in a Nutshell, 6th 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 16,384.