Monitor for disk IO
The diskgraph tool will graph disk IO under linux, in a terminal.
Examples:
$ ./diskgraph /dev/nvme0n1
$ ./diskgraph /dev/sda
You can also leave out the dev prefix and do:
$ ./diskgraph sda
Periodically (500ms intervals) it will read the statistics from /sys/block/DEVICE/stat and see how many sectors are read and written since last sample.
These are converted to bandwidth, by dividing by time.
It also shows (in orange) the number of operations that are in-flight at the moment the sample was taken.
Press ESCAPE or Q to exit diskgraph.
- Shows garbage on terminals that do not support 24 bit colour.
- Does not work on older linux kernels.
- Missing manual page.
- Assumes 512 byte sectors.
- Uses a lot of bandwidth when used over network, due to frequent screen-redraws. To mitigate: use small term size.
diskgraph is (c)2021 by Bram Stolk and licensed under the MIT license. Thank you to PQCraft for improving resize functionality and other changes.