Dell hardware raid 0 (sas5ir) or gmirror?

[Stefan Lambrev]

Andrew Pantyukhin wrote:
> On 1/15/07, Josef Karthauser <joe at tao.org.uk> wrote:
>> I'm purchasing a new server, and was wondering what anyone thought about
>> whether to pay extra for the SAS5IR card so I can RAID0 the two drives,
>> or whether to just rely on gmirror.  My worry about the former is that I
>> can't seem to find management tools for controlling the hardware
>> controller.  What if one of the drives fails?  How would I know?
>
> By all means I would go the gmirror way, and I always do
> even when a hardware raid controller is already present.
I really do not understand this. :)
When you say something like this it will be good to explain why you 
think so.
I have few servers with good hw raid controllers and I'm very happy with 
them, I also use
gmirror on my desktop pc, but it is not as good as hw raid on servers 
for sure.
Also it is harder to support it (during OS updates and etc).
Also it (gmirror) will put some load on the CPU and hw raid have it's 
own CPU/memory for this.
LSI have a nice tool to monitor/config RAID arrays that just works under 
fbsd in my case so I'm happy with it.
There are a lot of reasons to use hw raids on mission critical servers...
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-- 
Best Wishes,
Stefan Lambrev
ICQ# 24134177