What does "XXX GB free on most full server" mean in fdb cli status output?

Hi there,

I am quite new to Foundationdb.

In the fdb status [Operating space] section, i could get the SS and Log Serer space usage respectively.
And i want to know what “XXX GB free on most full server” mean.

Frome the source code,
foundationdb/StatusCommand.actor.cpp at ea986c64d0072af18041f9bf297e41961fed9119 · apple/foundationdb · GitHub,

it should mean the least available space.

So i just wonder why it’s not called something like “on the fullest server” since the superlative form is fullest?