experiences with RAID 6
woyciesjes at sbcglobal.net
Wed Jun 14 19:51:53 UTC 2006
Daniel Carrera wrote:
> Kaiser, Hans wrote:
>> Hello Daniel,
>> RAID6 is a standard!
> RAID6 is a standard in the same way that the OpenDocument Architecture
> is a standard. Sure, it's clearly defined and documented, but it's not
> something that a lot of people do in real life. Most RAID systems are 0,
> 1 and 5 and it's a good idea to stick to those.
>> RAID 6 is a better solution as RAID 5 and RAID 1!
>> Both Systems can only live with 1 defect HDD.
> RAID1 can work with arbitrarily many defect hard disks. Because it's
> mirrored, if you have 10 disks, you can afford to have 9 of them go bad
> and still have the system work.
>> RAID 6 can work with 2 defect HDDs!
> Do you, in practice, know how to recover a RAID 6 system with two defect
> HDDs? RAID 6 is a very non-trivial setup. That's why it's not used much.
>> Therefore it is a good question, if someone has experiences in RAID 6
>> for HA systems
> I didn't say it was a bad question. I suggested that you stick to things
> that are common and well tested and asked if you had a compelling reason
> to not follow the most tested route.
> How many disks do you plan to have? What do you want to use this
> computer for?
Plus there's the fact that RAID 6 is inefficient with a small number of
drives. It's 's only good when you have something like 10 drives or more
you want to put in a RAID setup.
--- Dave Woyciesjes
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--- AIM - woyciesjes
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