[tech] morwong's disks

[Paul Marinceu]

On Wed, 2003-08-13 at 22:03, James Andrewartha wrote:
> Morwong now has 5x 9gig and 1x4 gig disks. Currently, 2 9s and one are in
> use, with /home wholly using one of the 9s. This means we have 4x 9gig
> disks available for /home. There are several options:
> 
> o Software RAID 5 across all 4 disks. Gives 27gig usable space, some
>   redundancy, some CPU hit.
> 
> o Two RAID 1 sets containing 2 disks each, added to the one domain. Gives
>   18gig usable space, good redundancy, little CPU usage (comparatively).
> 
> o Two RAID 0 sets containing 2 disks each, added to the one domain. Gives
>   36gig usable space, no redundancy, good performance, little CPU usage.
> 
> There are two other options similar to the last one, namely one RAID 0 set
> containing 4 disks (higher throughput, but it'll block more since AdvFS
> only sees the one logical device), or just 4 disks in the domain (lower
> throughput, more spindles).
> 
> So, what do we want to do?

Well, I'm not much of a raid guru here, but:

I say, let's go for all out RAID-0 w/ all 4 disks.
(if people think advfs sucks, then make it 2 disks each)

What's the use of _some_ redundancy if it's too damn slow to be useable
reasonably.

(bleh, this post should be in tech)
-- 
 Paul Marinceu
 http://elixxir.ucc.asn.au