[CentOS] LVM: PV on 2 external USB drives

Mon Apr 23 07:21:45 UTC 2012
Mihamina Rakotomandimby <mihamina at rktmb.org>

Hi all,

I have a box, until warranty (I may not open it) and 2 external USB hard 
drives.

My perfect solution is to open the box, plug the drives on the SATA 
slots, and use them.

Unfortunately, I'll have to fall back to the cheap solution: I would 
like to use each external drive as physical volume (PV) and then "join" 
them as a VG in order to use a LVM composed by internal drives and the 
externals.

This is not for a "very secure" storage, just for a low reliability 
quantity temporary one: I just need it to work for 3-4 weeks with 
potential power cycles.

How to get the USB external drives to be detected in always the same 
order, so that they always get the same "name"? /dev/sdX fixed to them?
That way, the LVM wont be messed...

Thank you.

-- 
RMA.