[TriLUG] Setting Up RAID-5

[Lee Fickenscher]

On Dec 8, 2006, at 12:08 PM, Brian Henning wrote:

> Christopher L Merrill wrote:
>> Brian Henning wrote:
>>> Lee Fickenscher wrote:
>>>> If uptime and performance aren't really a concern, why even  
>>>> bother with raid?
>>>
>>> Two reasons:
>>> 1) Throughput, particularly on read.  Striping across several  
>>> disks means I can move more than one drive's max data rate at  
>>> once (right?).
>> Uhhhmmm...isn't that "performance"?
>
> I'd say it is; I never said performance wasn't a concern.  In fact,  
> I said throughput was my #1 concern, followed by data safety, and  
> that only uptime wasn't so much a concern.  (I did say /write/  
> performance wasn't as much of a concern, which may be where Mr.  
> Fickenscher misinterpreted me).
>
ACK! Forgot to add this to my last message:

If read performance is a concern, instead of getting more disks for a  
RAID, you could also use that money towards better disks, such as  
raptors. I seem to recall tests where a single raptor outperformed a  
2 disk raid 1.