Re: Really need RESYNC at the time of RAID1&5 creation?

["Corey McGuire" <coreyfro@coreyfro.com>]

Just my 2 cents but were it not for the initial resync last week, I may
have never known that my RAID was shafted.

sure, once it synced, it took two hours, but that is a price I am willing
to pay...

*********** REPLY SEPARATOR  ***********

On 7/1/2003 at 12:03 AM Lars Marowsky-Bree wrote:

>On 2003-06-30T14:34:51,
>   bmoon <bo@anthologysolutions.com> said:
>
>> Hi Neil & Raiders,
>> 
>> I am not quite sure if we really need to resync the array at the time of
>> RAID 1 or RAID 5 array creation. I tried and tested without RESYNC by
>> modifying "case1" and "case2" from MDADM source below, I could not
notice
>> any problems or issues.
>
>It's necessary to ensure consistency of the RAID, so that later, you can
>detect whether the RAID has scrambled some of your disk.
>
>Otherwise, you'd never know whether it wouldn't still be an artifact
>leftover from the creation of the array.
>
>Another option would be a bitmap of used chunks so you could tell one
>from the other, but that wouldn't make as much sense on a heavily used
>array. So just initialize it once.
>
>
>Sincerely,
>    Lars Marowsky-Brée <lmb@suse.de>
>
>-- 
>SuSE Labs - Research & Development, SuSE Linux AG
>  
>"If anything can go wrong, it will." "Chance favors the prepared (mind)."
>  -- Capt. Edward A. Murphy            -- Louis Pasteur
>-
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coreyfro@coreyfro.com
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