Re: deduplicating file systems: VDO with Debian?
On 2022-11-08, The Wanderer <wanderer@fastmail.fm> wrote:
>
> That more general sense of "backup" as in "something that you can fall
> back on" is no less legitimate than the technical sense given above, and
> it always rubs me the wrong way to see the unconditional "RAID is not a
> backup" trotted out blindly as if that technical sense were the only one
> that could possibly be considered applicable, and without any
> acknowledgment of the limited sense of "backup" which is being used in
> that statement.
>
Maybe it's a question of intent more than anything else. I thought RAID
was intended for a server scenario where if a disk fails, you're down
time is virtually null, whereas as a backup is intended to prevent data
loss. RAID isn't ideal for the latter because it doesn't ship the saved
data off-site from the original data (or maybe a RAID array is
conceivable over a network and a distance?).
Of course, I wouldn't know one way or another, but the complexity (and
substantial verbosity) of this thread seem to indicate that that all
these concepts cannot be expressed clearly and succinctly, from which I
draw my own conclusions.
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