experiences with RAID 6

[Daniel Carrera]

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?

Cheers,
Daniel.
-- 
http://opendocumentfellowship.org

  "He he. Maybe the problem is with the left mouse button :)"
   -- Daniel on IRC after 5 hours trying to figure out
      why nothing worked on his thin client... (it was)