RAIDframe: stripe unit per reconstruction unit

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

The man page says:

The stripe units per parity unit and stripe units per reconstruction unit
are normally each set to 1.  While certain values above 1 are permitted,
a discussion of valid values and the consequences of using anything other
than 1 are outside the scope of this document.

I noticed that reconstruction seems to read/write in units of one stripe unit,
which in my case (being 4k) seems rather inefficient. Is it possible to
accelerate recontruction by using a figure larger than 1 here?