No offense to that review, but it was really wasn't that good, and drew bad conclusions from the data. I posted it originaly and immediately regretted it.
See http://www.tweakers.net/reviews/557/18
Amazingly the controller with 1Gig cache manages a write throughput of 750MB/sec on a single drive.
quote: "Floating high above the crowd, the ARC-1120 has a perfect view on the struggles of the other adapters. "
It's because the adapter has 1Gig of RAM, nothing to do with the RAID architecture, it's clearly caching the entire dataset. The drive can't physicaly run that fast. These guys really don't know what they are doing.
Perhaps you didn't read the whole page. It says right at the beginning:
"Because of its simplicity and short test duration, the ATTO Disk Benchmark is used a lot for comparing the 'peformance' of hard disks. The tool measures the sequential transfer rate of a partition using a test length of 32MB at most. Because of this small dataset, ATTO is unsuitable for measuring media transfer rates of intelligent RAID-adapters which are equipped with cache memory. The smart RAID adapters will serve the requested data directly from their cache, as a result of which the results have no relationship to the media transfer rates of these cards. For this reason ATTO is an ideal tool to test the cache transfer rates of intelligent RAID-adapters."
Therefore, the results on this page are valid - they're supposed to show the cache/transfer speed, the dataset is 32MB(!) and should fit in the caches of all cards.
See also: http://www20.tomshardware.com/storage/20041227/areca-raid6-06.html
I trust toms hardware a little more to set up a good review to be honest.
I don't, for many (historical) reasons.
The 3ware trounces the Areca in all IO/sec test.
Maybe, but with no mention of stripe size and other configuration details, this is somewhat suspicious. I'll be able to offer benchmarks for the 8506-8 vs. the 1120 shortly (1-2 weeks), if you're interested (pg_bench, for example, to be a bit more on-topic).
Regards, Marinos
---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
