> >I assume you mean software RAID5, right? I've got a RAID50 array: 2
8-port
> >3ware cards in hw raid5, then those two devices combined software
raid0. I
> >didn't bother to make the log on a separate device, but I could, if
need be.
>
> That is silly. Just make a big raid0 of it. If for some reason one of
the
> 3ware cards takes a dump you WILL LOSE ALL YOUR DATA.
(snip)
> Which is exactly the reason to avoid the above mentioned configuration.
If
> one card dies you have just lost all your data.
Personally, I'd bet on a drive or two going out before the controller.
I haven't had any sort of drive controller (IDE/SCSI/RAID) go out in
nearly a decade, but I've had plenty of drives go South on me.
> Which was exactly what happend. They raid
> controller (Ami megaraid) got upset after one disk died and they lost
there
> complete Mysql Database.
Since this isn't the place, I won't point out the obvious flaws in
their backup/recovery scheme. My experience with the MegaRAIDs has been
that the cards do work fine, provided that you do everything exactly the
way the card expects - which is sometimes complicated, sometimes
difficult, and usually counter-intuitive. ; )
steve
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