Re: Best way to duplicate HDs
> > 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.
>
Except that I've pointed out already that we're specifically NOT looking
at a live RAID solution. This is a backup drive that is suppose to be
synced every 12 hours or 24 hours.
The idea being that if there is a virus, a cracker, or hardware
malfunction, then the backup drives can be immediately pulled out and
inserted into a backup computer, and switch on to provide immediate
restoration of services (with data up to 12 hours old, but better than
having up-to-date information that may be corrupted or "cracked" versions
of programs).
Sincerely,
Jason
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