Single drive versus RAID1

[Justin Zygmont]

I also use a software RAID-1 with IDE drives.  I have each drive on a 
seperate controller running rh9.  I noticed that It does run things just 
slightly faster than just using a single drive.


On Mon, 20 Oct 2003, Madison Kelly wrote:

> RAID 1 will somewhat (slightly) slow write times but this can be largly 
> compensated for by putting each drive on seperate controllers. Read 
> times can be as much as (theoretically) doubled because reads can happen 
> from either drive. Extra cost in the second drive may or may not be an 
> issue. Slight increase in CPU usage if you don't use a dedicated RAID 
> controller.
> 
> All in all, I don't build a server without at least RAID 1. It is a very 
> inexpensive way to maintain up-time in the case of a dive failure but 
> you are right, it certainly IS NOT a replacement to tape backups.
> 
> If you would like, I have the text from a talk on RAID (and IDE/SCSI) 
> that I gave to TLUG some time ago that covers a lot of the pros and cons 
> to various RAID levels.
> 
> Madison
> 
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