graph activity on physical devices like /dev/sda

[arthurzenika]

It would be nice for speedometer to graph activity on physical devices sur as /dev/sda (or iscsi devices as I'm trying to do).

Maybe use some information stored in /sys/block/ ? or in /sys/block/*/stat (inspired from the munin plugin diskstats cf https://github.com/munin-monitoring/munin/blob/master/plugins/node.d.linux/diskstats.in#L366 )

[eMPee584]

This should be an easy catch as well ... https://www.kernel.org/doc/Documentation/block/stat.txt