[OpenIndiana-discuss] Opinions on LSI RAID vs. ZFS

[Saso Kiselkov]

On 10/8/13 3:29 PM, Edward Ned Harvey (openindiana) wrote:
>> From: Peter Tribble [mailto:peter.tribble at gmail.com]
>>
>> This is where I get a little confused. Why an extra HBA at all - what's
>> wrong with using the SAS ports on the system board?
> 
> My usual reason for using an HBA is for hot plug, and red blinking lights on failed drives.  If you have degraded redundancy, the last thing you want is to accidentally remove the wrong drive.
> 
> I find, with the motherboard built-in sas controller, you usually need to power off in order to swap a drive, and you need to "devfsadm -Cv" after coming up, in order to make the new drive available.

What kind of a messed up SAS controller would that be? I've yet to see
this happen to me with any on-board SAS controller (in fact, all
on-board SAS controllers that I've encountered so far were LSI chips,
just placed on the motherboard instead on a plug-in board).

Cheers,
-- 
Saso