Re: Fwd: Installing Linux directly onto RAID6 Array...........

[Brad Campbell <brad@fnarfbargle.com>]

On 24/05/15 20:41, Wols Lists wrote:

> aiui raid won't help you at all here, will it?

Of course it will.

> Firstly, if you get write failures, the hard drive should swap the
> block, or the write layer should swap it. Nothing to do with raid
> whatsoever.

Yep..

> And if you get read errors, well, aiui, raid won't help here either -
> especially with mirrored raid, you just get a read failure. Raid does
> NOT give you error recovery unless the drive physically fails, and if
> it's a bad block it gets fixed at the disk or disk driver level - well
> below the raid driver.

Nope. If you get a read failure it will try and pull from another 
mirror, and *that* will succeed. Drives don't return dud* data. They 
either succeed or fail.

* Of course I've heard anecdotes from people about that happening, but 
it's not supposed to happen under *any* circumstances.

-- 
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