Question about internal hard drives

[Bruno Wolff III]

On Thu, Nov 19, 2009 at 15:31:50 -0500,
  Kevin O'Neil <kevin at kevinslair.com> wrote:
> Greetings,
> I have a question. Is it better to have multiple hard drives or will
> just one be ok?
> 
> I have a box that can have up to 2T...should I use two 1T or 4 500Gb?
> 
> Pros, cons welcomed.

More spindles will speed things up if requests are spread over the disks.

More disks will generally decrease reliability (unless you use some for
redundancy) since there are more failure points.