the meaning of disk_io_percent in v2018 dataset

dose it mean "used percent of requested disk space"?
does it consider the "writes_bytes" and "reads_bytes"?
does it normalize to "the requested disk space of the container" or "the machine's disk space"?

Start by locating the v2018 dataset schema or metadata for disk_io_percent and compare its definition with writes_bytes, reads_bytes, and the container or machine disk fields named here. Done means establishing the metric's calculation and normalization scope, then recording that definition in the appropriate dataset documentation.

Written by the indexing model from the issue text.