Simple external RAID backup?

["Scott R. Ehrlich" <user=81@nabble.blu.org>]

 I'm looking for a cheap external raid solution for a CentOS 5 box. 

My plan would be a device, such as possibly the 
http://www.cooldrives.com/qubayalretru.html

and load it with four drives.   Since the device itself likely does not 
support RAID 5, I'd anticipate the four drives could simply appear as four 
individual volumes, and I'd use the CentOS 5 tools to create a software 
RAID 5. 

Any known problems/limitations with this idea? 

What other, similar devices, possibly more reliable, are available? 

Portability would be really nice.   If the PC it is connected to goes 
down, I could simply build up another box and connect this device to the 
new system. 

The goal is to have it act as hard drive storage for backups of mounted 
CIFS volumes.   Not currently mission-critical data, but it would be very 
nice to have a low-costRAID 5 backup setup to start with. 

Thanks. 

Scott 

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