Re: RAID

[lordSauron <lordsauronthegreat@gmail.com>]

On 11/10/05, Bernd Petrovitsch <bernd@firmix.at> wrote:
> On Thu, 2005-11-10 at 11:30 -0800, lordSauron wrote:
> [...]
> > So in more clear and less confused words, does RAID 1 really share the
> > advantages in speed of RAID 0?  I'm just a little skeptical, and I'd

> No, RAID0 (Striping) can write in parallel half of the data on each disk
> where as the read must get all the correct blocks.
> On RAID1 (mirroring), you write the the data compoletely on each disk
> and read from only one of both.

So with RAID 1 I'll get write-speeds like I only have one drive with
no RAID, but with RAID 0 I'll get write speeds like I have umm... RAID
0...  but the read speeds are (effectively) the same, correct?

> The performance is usually irrelevant for the decision of RAID1 vs
> RAID0.

True...  makes me wonder about the frequency of drive faliures.  Those
who have experience: how often does that happen?  I've never had a
drive fail in my life, but I'm your normal desktop user so my PC is
off for about 8-16 hours a day.

Dang it, fate would have it that I should leave now, but I shall
return (sometime later today, if fate does not conspire against me...)

Thanks for all your great help and I hope that I'll someday be able to
repay you all in kind...

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