Alan B. Pearce wrote:

>>> yes it is quite easily done in the Disk Manager. Instead of a raid type
>>> arrangement ...
>> 
>> Sounds good - but it would mean that swapping out parts of the 'array'
>> as required became hard to very very hard 

I think it's impossible, basically. AFAIK you need a backup of the whole
set, and rebuild from scratch. I wouldn't recommend this.

> Yes, handy for knocking up a larger drive from 'bits' you have handy, but
> having a raid array of identical drives is much nicer from the failure
> point of view - replace failed drive & rebuild array, where the other
> requires full backup to have been done before failure, and then do a
> full restore.

How and whether this works depends on the RAID type. The other problem with
RAID arrays is that the controllers are not compatible in the sense that
you could swap your controller for another brand/model and expect to have
access to your data. If you want hardware RAID, you need to have backup
controllers. And better buy a brand where you can assume that you can get
one in the (unlikely but possible) case that your backup controller turns
out to be defective after your main controller broke...

Gerhard

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