[rescue] Sun 711

[George Adkins]

> Actually I've found that multichannel controllers in general use less of
> their maximum throughput per channel than do single channel controllers.
> I've tested MTI, Mylex, adaptec, DPT and other brands before and it has
> proved true for all of them. That may be just because a single 32/33 or
> 64/66 PCI slot doesnt provide for enough bandwidth to effecitvely utilize
> all the channels however.
>
The 3 channel UltraWide AMI that I have pretty much saturates a 32/33 PCI bus 
when it runs full out.  2 each 7200RPM/U160 drives per channel (6 total) 
pushes ~90-95 MB/Sec sustained at Raid 0. (4 meg caches on the drives IIRC 
and 32 Meg cache on the controller.)  And that's three 40MB/sec channels.



> On the PCI-X issue, that's great. Now are there high quality HBA's that
> support 64 bit 133mhz? I havent seen any yet, but if so than I'm all for
> them. I can't wait to get my hands on one to test if nothing else.
>
Compaq SmartArray 5312.  Dual channel, but the bus should support all the 
bandwidth that two of them can generate.

George