There's a special case when scrub rate is printed, the device sizes and
rate use different units. The size can be in terabytes while the rate
can be in hundreds of megabytes (contemporary 10-20T disks, 250MB/s).
The sizes use what is set on command line (or human readable by
default), while the rate is always human readable with exception to
the option --raw to provide a way to print the exact numbers without any
conversions.
This got broken in commit ec3c842859 ("btrfs-progs: scrub status:
with --si, show rate in metric units") that forced the command line mode
to the rate as well.
Instead of that we need to detect the SI/IEC mode and set it to the
human readable format of rate.
Signed-off-by: David Sterba <dsterba@suse.com>
7e0f506241