* raid6
@ 2006-06-15 3:07 葛雄资
2006-06-15 3:40 ` raid6 Henrik Holst
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: 葛雄资 @ 2006-06-15 3:07 UTC (permalink / raw)
To: linux-raid
I am confronted with a big problem of the raid6 algorithm,
when recently I learn the raid6 code of linux 2.6 you have contributed
.
Unfortunately I can not understand the algorithm of P +Q parity in
this program . Is this some formula for this raid6 algorithm? I realy
respect your help,could you show me some details about this algorithm?
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: raid6
2006-06-15 3:07 raid6 葛雄资
@ 2006-06-15 3:40 ` Henrik Holst
2006-06-15 3:43 ` raid6 Neil Brown
2006-06-16 18:27 ` raid6 H. Peter Anvin
2 siblings, 0 replies; 4+ messages in thread
From: Henrik Holst @ 2006-06-15 3:40 UTC (permalink / raw)
To: 葛雄资; +Cc: linux-raid
xiongzige wrote:
>Unfortunately I can not understand the algorithm of P +Q parity in
>this program . Is this some formula for this raid6 algorithm? I realy
>respect your help,could you show me some details about this algorithm?
I saw a few links a while back in the list:
http://www.issociate.de/board/post/243808/RAID6_Query.html
Regards,
Henrik Holst
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: raid6
2006-06-15 3:07 raid6 葛雄资
2006-06-15 3:40 ` raid6 Henrik Holst
@ 2006-06-15 3:43 ` Neil Brown
2006-06-16 18:27 ` raid6 H. Peter Anvin
2 siblings, 0 replies; 4+ messages in thread
From: Neil Brown @ 2006-06-15 3:43 UTC (permalink / raw)
To: 葛雄资; +Cc: linux-raid
On Thursday June 15, xiongzige@gmail.com wrote:
> I am confronted with a big problem of the raid6 algorithm,
> when recently I learn the raid6 code of linux 2.6 you have contributed
> .
> Unfortunately I can not understand the algorithm of P +Q parity in
> this program . Is this some formula for this raid6 algorithm? I realy
> respect your help,could you show me some details about this algorithm?
See:
http://en.wikipedia.org/wiki/Redundant_array_of_independent_disks#RAID_6
and
http://kernel.org/pub/linux/kernel/people/hpa/raid6.pdf
NeilBrown
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: raid6
2006-06-15 3:07 raid6 葛雄资
2006-06-15 3:40 ` raid6 Henrik Holst
2006-06-15 3:43 ` raid6 Neil Brown
@ 2006-06-16 18:27 ` H. Peter Anvin
2 siblings, 0 replies; 4+ messages in thread
From: H. Peter Anvin @ 2006-06-16 18:27 UTC (permalink / raw)
To: linux-raid
Followup to: <1caa67950606142007p59c6b079xe2db9a7a94e506ef@mail.gmail.com>
By author: "=?GB2312?B?uPDQ29fK?=" <xiongzige@gmail.com>
In newsgroup: linux.dev.raid
>
> I am confronted with a big problem of the raid6 algorithm,
> when recently I learn the raid6 code of linux 2.6 you have contributed
> .
> Unfortunately I can not understand the algorithm of P +Q parity in
> this program . Is this some formula for this raid6 algorithm? I realy
> respect your help,could you show me some details about this algorithm?
http://www.kernel.org/pub/linux/kernel/people/hpa/raid6.pdf
-hpa
^ permalink raw reply [flat|nested] 4+ messages in thread
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2006-06-15 3:07 raid6 葛雄资
2006-06-15 3:40 ` raid6 Henrik Holst
2006-06-15 3:43 ` raid6 Neil Brown
2006-06-16 18:27 ` raid6 H. Peter Anvin
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