Re: OT: harddrive addition for RAID

[Richard <richard.bown@blueyonder.co.uk>]

On Mon, 17 Oct 2011 17:12:00 +0000 (UTC)
Camaleón <noelamac@gmail.com> wrote:

> On Mon, 17 Oct 2011 17:39:34 +0100, Richard wrote:
> 
> > I'm thinking about adding another 500 GB HD to use RAID. 
> 
> Hardware RAID or software RAID? If the latter, what kind of RAID, "md" or 
> "dm?" And what kind of raid level: 0, 1, 1+0...? ;-P
> 
> > 2 questions:-
> > 
> > 1. does the HD need to be exactly the same as the one its being paired
> > with ?
> 
> Not necessarily, but you will lose the remainder difference space between 
> the smallest and the bigger of the disks. If you were referring to the 
> brand/model/serial number of the disks some people think is better they 
> exactly match (me) others think the opposite.
>  
> > 2. how easy is it to change from a non RAID config to a RAID config. ie.
> >  can I just  put in the second HD and run something to automagically
> >     change the config to RAID ?
> 
> I don't think so... manual reconfiguration is required which usually 
> involves more than one command.
> 
> Greetings,
> 

Thanks Camaleon
The reason I ask about matching the HDs is that I have a Hitachi 500 GB drive, I can add
another 500 GB HD for GBP 32, but if it requires an exact match a Hitachi 500 GB HD will cost
around GBP 50.
As for question 2 , I had a feeling that it would have to be a manual process :(, 

Comments appreciated


-- 
Best wishes / 73
Richard Bown

e-mail: richard@g8jvm.com   or   richard.bown@blueyonder.co.uk

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