[CentOS] performance lost in using a software raid array with only 1 disk

Jerry Geis wrote:
> Is there any performance lost in using a software raid array
> with only 1 disk?
> 
> I was wanting to use the mdadm monitoring tools to monitor the
> machines single disk drive for failures and such. Is there any
> performance hit for such a setup?

I assume you are talking about RAID1 arrays. No, you won't. Rather, you 
will get a performance loss if you carve up your disk into more than one 
partition.

> 
> Some machines have RAID some machines dont (for me) and
> I was thinking about a common setup.
> 
> Also then if I want in the future I can actually just add the second
> disk and now I have RAID.

I don't think you can actually build an array with missing disks.