[CentOS] Re: settings up cheap a NAS / SAN server, is it possible?

Scott Silva ssilva at sgvwater.com
Wed Jul 2 22:49:38 UTC 2008


<snip>
> 
>         Even if it's fake RAID5(RAID software)?
>         Didn't know that.
> 
>     Raid 5 need a minimum of 3 drives. The only way to get 2 drives in
>     software raid is to create the array with the "missing" statement.
>     With only 2 drives, you have a stripe with a failed parity.
> 
>     So 2 drives is already missing one, and the next failure is doom.
>     Raid 1 (mirror) is fine with 2 drives.
> 
> 
> Then I will have to backup  ASAP and re install the Array in Raid1, 
> thank you scott.
> But the odd thing its that I've never had any errors regarding RAID or 
> even HDs.
> Will recheck my config.
> 
> 

Make sure that it is raid 5 before you mess with it. I find it hard to believe 
that it let you set it up with only 2 drives.
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