ioping
monitors disk I/O latency in real time, similar to how ping shows network
TLDR
Measure disk latency
$ ioping [path]
Run specific number of requests$ ioping -c [10] [path]
Measure with specific size$ ioping -s [1M] [path]
Measure disk seek rate$ ioping -R [/dev/sda]
Measure sequential speed$ ioping -RL [/dev/sda]
Use direct I/O$ ioping -D [path]
Quiet mode with statistics$ ioping -q -c [100] [path]
SYNOPSIS
ioping [options] path|device
DESCRIPTION
ioping monitors disk I/O latency in real time, similar to how ping shows network latency. Generates I/O patterns and measures response time. SSDs should show sub-millisecond latency; HDDs typically show a few milliseconds. High latency spikes may indicate problems.
PARAMETERS
-c count
Stop after count requests.-s size
Request size (default 4k).-R
Disk seek rate test.-L
Sequential operations (default random).-D
Use direct I/O (O_DIRECT).-W
Use writes (dangerous for devices).-C
Use cached I/O.-A
Use asynchronous I/O.-q
Quiet mode, show only summary.-w seconds
Stop after specified time.