Re: Supermicro SAS controller

[Ramon Hofer <ramonhofer@bluewin.ch>]

On Tue, 08 May 2012 15:27:26 +0000, Camaleón wrote:

> 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.

This may be true for business but at home I like to have silent and 
energy efficient devices. They don't have to be as responsive as 
professional equipment I think.


>>> 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).

This sounds good.
And I can leave the existent RAM and I have 12 GB after adding 2x 4 GB :-)


Best regards
Ramon