On Sun, Feb 06, 2000 at 11:34:32PM +0000, Glenn McGrath wrote:
>
> > Second thought: It would be nice to have something like RAID-5 but with the
> > Hamming code instead of only parity. If that could be done with decent
> > performance, that would be interesting :) There probably already is
> > some semi-unofficial number assigned to that level.
> >
> > If you have some time, I would suggest improving on the existing code. There
> > still are /* FIXME */ places in the 0.90 code (they aren't critical, but they're
> > there). Especially 0.90 support in 2.3 needs help - talk to Ingo about that
> > (he's probably _very_ busy, so don't be surprised if he can't answer immediately)
> >
>
>
> Ive been wanting to implement a raid-6 mode for a while, not quite
> confident enough to take on the task.
>
> Jakob : How large a task do you think it would be to implement raid6 ?
I don't know. From what I could read, RAID-6 is RAID-5 with two parity blocks
per stripe instead of one. I'm not sure about this, but I would guess that
changing the existing RAID-5 code to RAID-6 behaviour would be quite doable.
But look at the code, I'm guessing here... I just don't know the RAID-5 code
well enough.
There are some other people here on the list who have better insight into these
matters :)
> >From www.whatis.com "RAID-6. This type is similar to RAID-5 but includes
> a second parity scheme that is distributed across different drives and
> thus offers extremely high fault- and drive-failure tolerance"
>
> By having two parity schemes and implementing a 2-dimensional parity it
> would enable ultimate versitility in redundancy vs efficiency. It could
> doing the normal hamming codes.
2 dimensional ? If it's RAID-5 of RAID-5 arrays, you can do it already.
--
................................................................
: [EMAIL PROTECTED] : And I see the elder races, :
:.........................: putrid forms of man :
: Jakob Østergaard : See him rise and claim the earth, :
: OZ9ABN : his downfall is at hand. :
:.........................:............{Konkhra}...............:
