Re: Which RAID Controllers to pick/avoid?

On Wed, Feb 2, 2011 at 11:15 PM, Greg Smith <greg(at)2ndquadrant(dot)com> wrote:
> Scott Marlowe wrote:
>
> On Wed, Feb 2, 2011 at 10:46 PM, Greg Smith <greg(at)2ndquadrant(dot)com> wrote:
>
>
> example.  Scott Marlowe was griping recently about a similar issue in some
> of the LSI models, too.  I suspect it's a problem impacting several of the
> larger RAID cards that use the big Intel IOP processors for their RAID
> computations, given that's the part with the heatsink on it.
>
>
> Specifically the LSI 8888 in a case that gave very low amounts of air
> flow over the RAID card. The case right above the card was quite hot,
> and the multilane cable was warm enough to almost burn my fingers whe
>
> Interesting...that shoots down my theory.  Now that I check, the LSI 8888
> uses their SAS1078 controller, which is based on a PowerPC 440
> processor--it's not one of the Intel IOP processors at all.  The 8308 Dan
> has as an option is using the very popular Intel IOP333 instead, which is
> also used in some Areca 1200 series cards (1220/1230/1260).
>
> The Adaptec 5405 and 5805 cards both use the Intel IOP348, as does the Areca
> 1680.  Areca puts a fan right on it; Adaptec does not.    I suspect the only
> reason the 5805 cards have gotten more reports of overheating than the 5405
> ones is just because having more drives typically connected increases their
> actual workload.  I don't think there's actually any difference between the
> cooling situation between the two otherwise.

The LSI 8888 has a fan right on it. But it was just moving 90C air
around in place.