raid 6
On 1/24/2013 7:37 AM, Wenshan Ren wrote:
Rudi Ahlers writes:
On Thu, Jan 24, 2013 at 7:59 AM, Ren Wen shan renws1990@gmail.com wrote:
Hello everyone,
I am new to this group so please forgive me if this question has been already asked.
With four identical hard drives, I want to setup RAID 5 + 1 hot spare by a fresh CentOS (6.3) installation.
I have read this article (
http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-raid-config.html ) and watched this video (http://www.youtube.com/watch?v=qm3MkuTfDLw), now I have the basic ideas.
However, due to my limited experience and knowledge on this area, I am still confused.
To make things easier, I only need a swap and a `/' partition.
Could you give me any hint on this? What should I read to get the basic knowledge? How can I setup a simple RAID 5 + hot spare?
Regards,
- Meatball
Since you're new to this list, and this topic, I'm going to spare you the headache. Don't use RAID5 Even with a hot-spare, if you use large drives chances are you'll loose everything if one of the drive fail and you need to rebuild the whole set.
Rather use RAID 10. The newer CentOS installation disks has an option to setup RAID10, alternatively.
There are numerous tutorials out there on how todo it, but this one seems quite easy to follow: http://www.youtube.com/watch?v=zlOK1voR2nA
Hi Rudi,
Thanks a lot for your reply, the video is very helpful.
I read this discussion on serverfault.com http://serverfault.com/questions/106131/raid-5-with-hot-spare-or-raid-10-wit...
but still quite confused as some people think RAID-10 is way safer while some people wrote: " I'd have to disagree with CHopper3. Since there are only 4 drives in this situation your failure capabilities are the same (2 drives) with either scenario, except with raid 10 if you happen to lose the wrong 2 drives then you'll have a real problem. Also there is definitely an added benefit of having a global spare for your other RAIDs as well. "
My new question is: As RAID 10 requires at least 4 hard drives (not very sure about this information), with only 4 hard disks, is RAID-10 without hot spare a better solution than RAID-5 + 1 hot spare? Why or why not?
-- Wenshan Ren Email: renws1990@gmail.com Blog: wenshanren.org Douban: www.douban.com/people/renws _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos