lvmsadc

Run the collector (legacy LVM1 systems only)

$ lvmsadc

$ dmstats report [/dev/mapper/device]

lvmsadc

lvmsadc was the LVM system activity data collector for gathering I/O statistics on logical volumes. It collected raw performance data that could be analyzed with the companion tool lvmsar.
This command is not supported under LVM2. Modern LVM2 installations should use dmstats instead, which provides more comprehensive device-mapper statistics including histogram data and region-based measurements.

Deprecated: This command only works on legacy LVM1 systems. For LVM2, use dmstats to collect and report I/O statistics on device-mapper devices.

lvmsar(8), dmstats(8), iostat(1), lvm(8)