[ale] Quiet spinning drives?

[Alex Carver]

Anyone have a suggestion for a quiet spinning drive?  I've got a few
that need to be replaced but due to a variety of factors an SSD may not
be the best option.  I could potentially be swayed.

The machine is one of my home servers.  It's always running but the disk
I/O isn't huge.  It's not a fast machine so I don't need an ultra fast
drive.  I'll have to add a SATA PCI card to it to support new drives anyway.

I was thinking one of the WD Blue 5400 RPM drives as they seem to be
fairly quiet from reviews.  I also considered using a smaller 2.5" drive
instead of the 3.5" drive.

Capacity doesn't need to be huge, 500GB-1TB is more than sufficient for
this machine (it currently has two 8 GB drives).  It's primary functions
are data collection (writing sensor data to various databases, currenly
using only 1 GB) and log storage from various devices (logs are rotated
so they don't consume large amounts of storage, about 100 MB).
Secondary function is serving that data either via web page or direct
database access.  The web pages use only about 1 GB as well.