Re: availability of SATA vendors

Arjen,

As usual, your articles are excellent!

Your results show again that the 3Ware 9550SX is really poor at random I/O
with RAID5 and all of the Arecas are really good. 3Ware/AMCC have designed
the 96xx to do much better for RAID5, but I've not seen results - can you
get a card and test it?

We now run the 3Ware controllers in RAID10 with 8 disks each and they have
been excellent. Here (on your site) are results that bear this out:
http://tweakers.net/reviews/639/9

- Luke

On 11/22/06 11:07 AM, "Arjen van der Meijden" <acmmailing(at)tweakers(dot)net>
wrote:

> Jeff,
>
> You can find some (Dutch) results here on our website:
> http://tweakers.net/reviews/647/5
>
> You'll find the AMCC/3ware 9550SX-12 with up to 12 disks, Areca 1280 and
> 1160 with up to 14 disks and a Promise and LSI sata-raid controller with
> each up to 8 disks. Btw, that Dell Perc5 (sas) is afaik not the same
> card as the LSI MegaRAID SATA 300-8X, but I have no idea whether they
> share the same controllerchip.
> In most of the graphs you also see a Areca 1160 with 1GB in stead of its
> default 256MB. Hover over the labels to see only that specific line,
> that makes the graphs quite readable.
>
> You'll also see a Dell Perc5/e in the results, but that was done using
> Fujitsu SAS 15k rpm drives, not the WD Raptor 10k rpm's
>
> If you dive deeper in our (still Dutch) "benchmark database" you may
> find some results of several disk-configurations on several controllers
> in various storage related tests, like here:
> http://tweakers.net/benchdb/test/193
>
> If you want to filter some results, look for "Resultaatfilter &
> tabelgenerator" and press on the "Toon filteropties"-tekst. I think
> you'll be able to understand the selection-overview there, even if you
> don't understand Dutch ;)
> "Filter resultaten" below means the same as in English (filter [the]
> results)
>
> Best regards,
>
> Arjen
>
> On 22-11-2006 17:36 Jeff Frost wrote:
>> On Wed, 22 Nov 2006, Bucky Jordan wrote:
>>
>>> Dells (at least the 1950 and 2950) come with the Perc5, which is
>>> basically just the LSI MegaRAID. The units I have come with a 256MB BBU,
>>> I'm not sure if it's upgradeable, but it looks like a standard DIMM in
>>> there...
>>>
>>> I posted some dd and bonnie++ benchmarks of a 6-disk setup a while back
>>> on a 2950, so you might search the archive for those numbers if you're
>>> interested- you should be able to get the same or better from a
>>> similarly equipped LSI setup. I don't recall if I posted pgbench
>>> numbers, but I can if that's of interest.
>>
>> I could only find the 6 disk RAID5 numbers in the archives that were run
>> with bonnie++1.03. Have you run the RAID10 tests since? Did you settle
>> on 6 disk RAID5 or 2xRAID1 + 4XRAID10?
>>
>