[nmglug] raid 10 vs 5

[Andres Paglayan]

On Thu, 2009-09-10 at 09:13 -0600, Brendan wrote:

> On 09/09/2009 10:31 PM, Gary Sandine wrote:
> > I never looked into this -- is it possible
> > that hard drive manufacturers really have distinct manufacturing
> > processes for their enterprise or server class disks and for their
> > consumer class disks?  I'm not sure what the difference really is,
> > but the failure rates reported by Google and what I have seen in
> > practice (using consumer class disks in several 16 disk RAID arrays
> > for a few years) are pretty low.
> 
> The enterprise drives typically have higher tolerances for things like 
> cycle count, vibration, etc that they experience when they're packed in 
> together in large arrays.  Since Google is doing 2 disks per server 
> vibration may not be an issue for them.  Other suggestions:
> 
> 1. Buy a drive with a 5 year warranty.  You will use it, even with 
> enterprise grade drives.  Failure is inevitable.
> 

yep, that's the bottom line,
prepare for failure because it will happen,

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