in-situ conversion to FT disk config?

Ben Scott dragonhawk at gmail.com
Tue Nov 15 12:58:01 EST 2005


On 11/14/05, John Abreau <jabr at blu.org> wrote:
> After that, well, RAID protects you from a hardware failure; it's not a
> replacement for backups.

  This cannot be over-emphasized.  I've repeatedly had the argument
with clients/bosses/etc. about "Why do we need backups?  We've got
redundant disks, right?"  Sure, and the system will happily mirror the
virus/worm/hacker, or the accidental delete, or the mis-typed data
entry, or the database corruption, or whatever.  Worse still is when
you don't notice that right away -- it's four weeks later when someone
goes, "Hey, I just opened up the inventory history file, and it's full
of garbage!"

  Then there was that time a customer bought a substandard, no-name
"RAID" card, and when a disk died, it mirrored the infinite supply of
zeros from the dead disk to the good one...

  Make regular, rotated, off-line backups, or assume you will lose the data.

-- Ben "Only back up the data you want to keep" Scott



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