1dm-delay 2======== 3 4Device-Mapper's "delay" target delays reads and/or writes 5and maps them to different devices. 6 7Parameters: 8 <device> <offset> <delay> [<write_device> <write_offset> <write_delay>] 9 10With separate write parameters, the first set is only used for reads. 11Delays are specified in milliseconds. 12 13Example scripts 14=============== 15[[ 16#!/bin/sh 17# Create device delaying rw operation for 500ms 18echo "0 `blockdev --getsize $1` delay $1 0 500" | dmsetup create delayed 19]] 20 21[[ 22#!/bin/sh 23# Create device delaying only write operation for 500ms and 24# splitting reads and writes to different devices $1 $2 25echo "0 `blockdev --getsize $1` delay $1 0 0 $2 0 500" | dmsetup create delayed 26]] 27