Re: RAID 5 Stripe question
- From: "Glenn LeCheminant" <the.only(delete)@gmail dot com>
- Date: Sun, 12 Jun 2005 12:18:53 -0700
http://www.pcguide.com/ref/hdd/perf/raid/levels/singleLevel5-c.html
http://www.pcguide.com/ref/hdd/perf/raid/concepts/gen_Parity.htm
--
Glenn LeCheminant
CCNA, MCSE 2000/2003 + Security
"mountaindog" <lhedrick@xxxxxxxxxxxxxxxx> wrote in message
news:O8XO4MpbFHA.2756@xxxxxxxxxxxxxxxxxxxxxxx
>I had to rebuild a lost drive on a RAID 5 system last week. After thinking
>about it I have a few questions. If there is a better place to post RAID
>questions please feel free to inform me of a better new group.
>
> My question has to do with what actually makes up a stripe. If we have a
> string like:
>
> ?abcdefghijklmnopqrstuvwxyz012345689????
>
> and we were to write each byte to each drive that would be a mirror so I
> understand that is not what makes up stripe data. So a stripe would seem
> to be blocks of characters, which would be written to different disks.
>
> Here is what I don?t understand. If one block is
>
> ?abcdef?
>
> and, it is placed on disk one and disk one is then lost, how does parity
> rebuild an entire block. I understand how parity can isolate single bit
> failures but I don?t understand how it can rebuild a disk, which held 5
> gig of data. Could someone provide an explanation or point me to a FAQ,
> readme, web site which would explain how this works.
>
> It makes me nervous when I don't understand how this stuff works. It is
> easy to make a serious mistake with RAID so the more we know the better.
>
>
>
.
- References:
- RAID 5 Stripe question
- From: mountaindog
- RAID 5 Stripe question
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