Fred K Ollinger on Sat, 1 Jun 2002 12:33:29 -0400


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RE: [PLUG] Linux Raid


> Raid 1 (mirroring) as you said, can increase read speed, but, it doesn't
> speed up writing, as, it has to write the same data to 2 independent disks
> at the same time.  It does, however, add redundency (so, you have 2 disks
> with the same data on them, one fails, you still have a full copy of your
> data -- granted you have to do some restoring, but, you don't lose any
> data -- this is what is important to some people).  Then there are the

Keep in mind that this is hardware failure protection only. If your
software corrupts a file, then raid 1 will happily corrupt the copy
on the other disk.

Keep a backup system in place, and don't rely on raid to back things up.
Raid will just help keep your server up. Nobody suggested otherwise, I
just thought it would be nice to reinforce the fact that raid isn't a
replacement for frequent backups.

Good day,

Fred


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