Re: RAIDframe parity rebuild

[mlelstv%serpens.de@localhost (Michael van Elst)]

ef%math.uni-bonn.de@localhost (Edgar =?iso-8859-1?B?RnXf?=) writes:

>> and by writing the full disk (or parity blocks) you may cause
>> additional errors.
>I don't get that.

You replace disk contents with something else.

Think about when you have to check parity. Usually that's after a crash
that might have damaged data. The same thing (e.g. memory corruption)
could hit you when you rewrite the parity, and from a few bad blocks you
quickly go to "whole parity information is bad" without even knowing
about it.

Verifying parity (and fixing up errors) is less risky.

-- 
-- 
                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."