In article ,
Will wrote:

I've seen various consumer SATA RAID arrays record write throughputs around
30 to 60 MB/second, which implies that the individual drives rarely deliver
more than 15 MB / second, and that would be for contiguous data.

I suppose if you're uninterested in the facts it implies that. A trivial
test will determine that for contiguous data even the cheapest modern
SATA drives write at about three to four times the rate you quote.

Look elsewhere for the explanation for poor long write performance with
SATA RAID arrays. It's not the write rate of the underlying drives
that's the problem.

--
Thor Lancelot Simon

"The inconsistency is startling, though admittedly, if consistency is to
be abandoned or transcended, there is no problem." - Noam Chomsky