searching raid 6 card working with fedora 23

[Gordon Messmer]

On 02/02/2016 08:43 AM, thibaut noah wrote:
> It's not an enterprise environnement, i will just store movies, tons 
> of it.
> Even for personnal datas like photos and stuff, never saw a simple 
> user using ecc ram, especially in the windows world of gaming.

Well, yes, but if a bit flips when you're playing a game, it'll probably 
produce an odd pixel.  At worst, the game might crash.  The effect is 
likely to be transient.

If bits flip in your storage array, the effect will probably be permanent.

> It would be safer, but not worth the money.

It's your data.  It just seems odd to me.  I always use ECC where it's 
available.  Crucial offers DIMMs for my system at $25-30 for 4GB, 
non-ECC.  ECC is $35.  A difference of $5-10 per DIMM seems pretty small 
when you compare it to the HBA and disks you're putting in the system.

> Driver compatibility issues, i'm currently running 4.2.5 and i already 
> returned 3 cards who didn't have a compatible driver (tried for one 
> week to run the last one with the help of highpoint support but i 
> returned it after, didn't want to take the chance to loose my money 
> since the allowed delay to return an item is not that long).

https://ata.wiki.kernel.org/index.php/Hardware,_driver_status
https://ata.wiki.kernel.org/index.php/SATA_hardware_features

The developers comment on various chipsets, and recommended avoiding 
Marvell.  In the past, I've found some consumer grade add-in cards by 
selecting a chipset and searching for that, rather than more generic terms.

> I want to run 6drives (3To each) in raid 6.
> What do you mean by hotplug backplane? I googled it but it is not very 
> clear to me.

I think I'm talking about the cases you mentioned in an earlier email.  
A lot of HBAs have a single cable connection, such as a mini-SAS 
connection, that connects to a board (a backplane) that sits at the back 
of the drive bays, on which the power and data connections for the 
drives are mounted.

> Because i do, if i understand what i read correctly hardware raid is 
> limited by the card components when my zfs raid will be limited by my 
> cpu and ram.

Well, ZFS will be subject to any limitations that exist in the card 
components as well, in addition to CPU and RAM limitations.  I'm not 
really sure what you mean, here.