Re: Best way to duplicate HDs

[Jeff Waugh <jdub@perkypants.org>]

<quote who="Jason Lim">

> For example, http://www.arcoide.com/ . To quote the function we're looking
> at " the DupliDisk2 automatically switches to the remaining drive and
> alerts the user that a drive has failed. Then, depending on the model, the
> user can hot-swap out the failed drive and re-mirror in the background.".
> So it "re-mirrors" in the background... how do they perform that
> reliabily?

That's just RAID 1, which has done it since the dawn of time [1]. You can
achieve the same thing with Linux software RAID; you just pull out one of
the drives and you have half a mirrored RAID set. It's pretty neat to watch
/proc/mdstat as your drives are resyncing, too. ;)

The advantage you get with this hardware is the hot-swap rack... and that's
about it.

- Jeff

[1] May not be chronologically correct.

-- 
       "A rest with a fermata is the moral opposite of the fast food        
           restaurant with express lane." - James Gleick, Faster