Too much time wasted installing fedora on raid1

Avi Kivity avi at argo.co.il
Sat Dec 24 16:26:06 UTC 2005


Paul P Komkoff Jr wrote:

>Replying to David Woodhouse:
>  
>
>>RAID is just a hack which hides the redundancy from the file system; the
>>kind of thing we always used to have to do for DOS compatibility so that
>>we could provide an INT 13h handler and have it 'just work'. It's much
>>the same reasoning which led to the built-in 'translation layers' on
>>cheap CF cards and USB sticks which so often eat your data and which
>>have a tendency to use up their limited lifetime in copying obsolete
>>sectors belonging to deleted files around on the underlying medium.
>>
>>We don't _need_ that kind of layering in Linux. Have a library of
>>functions which can be used for such redundancy, by all means -- but
>>don't just make RAID pretend to be a 'standard' block device and prevent
>>all possibility of sharing knowledge between the file system and the
>>layer providing the redundancy. That's just insane.
>>    
>>
>
>Well, everything you said habove is correct. But I've yet seen any
>"redundant block device filesystem" project anywhere.
>  
>
Sun zfs, Isilon OneFS, possibly others.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.




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