Re: Supermicro SAS controller

[Camaleón <noelamac@gmail.com>]

On Tue, 08 May 2012 09:22:56 +0000, Ramon Hofer wrote:

> On Mon, 07 May 2012 14:35:31 +0000, Camaleón wrote:

(...)

>> Those "green" disks can be good for using them as stand-alone devices
>> for user backup/archiving but not for 24/365 nor a NAS nor something
>> that requires quick access and fast speeds such a raid.
> 
> I haven't thought about that. So the controller must be a bit more
> patient ;-)

"Must" is the key here. But don't expect such collaboration from mdraid 
nor the hardware controller :-)

> I will stay away from the green drives in future.

I try to keep away from any computer device that is tagged to be "eco-
friendly" (e.g., switches) because they usually cause more trouble than 
normal (watt-hungry) devices. 

And the same goes with computer "power-saving" options (hibernation and 
suspension), I never use that for servers... what the hell, when the 
computer is "on" I want it to be "on" not sleepy, I need a quick response 
to whatever event. When I don't use the computer I just power-off and no 
single watt is wasted.

>> For RAM you never-ever get enough :-)
>>  
>>> Ok, RAM is quite cheap and it shouldn't affect power consumption with
>>> in comparison to >20 hard disks.
>> 
>> Exactly, your system will be happier and you won't have to worry in
>> increasing it for a near future (~5 years). My motto is "always fill
>> your system with the maximum amount of RAM, as much as you can afford",
>> you won't regret.
> 
> Ok this sounds reasonable. But for 16 GB RAM I can get a 2 TB disk. So I
> will have to sleep in it :-)

I think 4 GB RAM modules can be still affordable (<150€ per module?), if 
so, you can add 2 modules of 4 GiB. to get 8 GB from start and afterwards 
-should you need it- you can add 2 modules more to get 16 GB (although 
the board allows up to 32 GB. of RAM by using 8 GB modules but that can 
be costly).

Greetings,

-- 
Camaleón