RAID question

[Mark Haney]

John Nichel wrote:
> Correct me if I'm wrong, but if I have three 250Gb SATA drives in Raid
> 5, when I do a df -h, should I be seeing this...
> 
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sda5             914G  1.3G  867G   1% /
> /dev/sda1              99M   12M   83M  13% /boot
> none                 1014M     0 1014M   0% /dev/shm
> /dev/sda2             2.0G   36M  1.9G   2% /tmp
> 
> If my understanding is correct, I should just be seeing one ~250Gb
> partition?
> 
> TIA
> 

Well you shouldn't be seeing one ~250GB drive if you have 3 250GB drives
in a RAID 5 configuration.  You _should_ see on drive with about ~500GB
on it as 1/3 of the total drive space is used for parity across all 3
drives.

So what I'm saying is, I don't have a clue why you're showing ~900GB
when even with those 3 drives striped you should only see ~750GB.



-- 
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Mark Haney
Sr. Systems Administrator
ERC Broadband
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