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With the 4 or 8 port models, the difference between Intel and Areca are minimal if you decide for a raid5. If you go for the 12+ port model, the difference in cache memory becomes a major advantage for Areca. Given your options, Intel seems like the best BFTB (Bang-for-the-buck).
Raid 5 has basically closed the gap to make it more attractive than it has been in the past
For sequential reads/writes (which is what video is all about), I'm not sure that will ever be the case. Have you seen recent benchmarks comparing RAID 3 and RAID 5 on the same card?
No, I have not seen recent benchmarks comparing RAID 3 and RAID 5 on the same card. I looked at many posts, and thought both would be relatively equal. I will research some more, if anyone has data, please share.
Harm, I chose to not go with the Areca 1880ix-12 (which I understand can have memory expanded) due to basically the increased cost ~$859. I am using these "savings" for an upgraded monitor (Dell U2711). I am trying to keep my new build to approximately $3K - I am at my limit with the cheaper raid controller. I cannot personally justify more as I dabble in video editing and am not a professional. I could go higher (my wife does not care), but am trying for once to be practical. I am still on the fence slightly for the raid 10, but believe you even mention in your posts that for 4+ drives, go with the Raid 3 or 5, and that 10 is too expensive for the $ / TB. As such, I am heavily leaning toward the Raid 5.
I would like to see these benchmarks as well. The 8 drive raid 5 and 6 numbers I tested several times are well inline with raid 3.
What kind of sustained reads/writes were you seeing Eric?
Intel SAS RS2PI080 8 Port controller with 512 DDR2 Ram
WD VelociRaptor 600 GB, SATA 6 Gb/s, 32 MB Cache, 10,000 RPM
8x Drive Raid 5 - 745MB/s read 735MB/s Write
WD 1TB SATA 6 Gb/s, 64 MB Cache, 7200 RPM
8 Drive Raid 5 - 703.8MB/s read 670MB/s Write
These benchmarks were run back when the Intel card first released. There have been several firmware and driver updates optmizing the 6GB/s performance. These have been consistant plus or minus 20MB/s for several months.
The raid 6 volume was reading 650MB/s and writing at 605MB/s to 635MB/s