ServeTheHome – Intel Xeon AMD Opteron RAID Controller Reviews

Just to check some additional 15k rpm SAS numbers, I used three Seagate Cheetah 15k.5 300GB drives in Raid 5 to see what the numbers would look like. The drives are 3.5″ form factor units so they run quite a bit warmer than the 15k.1 2.5″ Savvios that are also in this machine. First the chart:

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Did some testing this weekend with the new Adaptec 5805. Since I wanted to see what this card could do, I decided to try it with some cheap Seagate Savvio 15k.1 36.7GB SAS drives. Overall performance is fine, however there was a consistently interesting note in ATTO’s benchmark at 64k. I tried every stripe size imaginable, and there was a distinct fall-off every time in read speeds. I also tried the newest firmware, same result. Truly odd indeed.

8x Seagate Savvio 15k Raid 5 Adaptec 5805

Notice the dip in read performance at 64k. This seems to be very strange and did not go away with three different firmware versions.
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Although more will follow, here’s a quick glimpse of what a cheap, but quality hardware raid solution can do with cheap, and large SATA drives in Raid 5. Keep in mind that the Perc 5/i uses the old IOP333 CPU clocked at 500MHz. Many current 3 series Adaptec products, for example, utilize the IOP333 at 800MHz. Also, one should note that there are reports that the IOP348 has some issues with SATA drives making the below representative of very inexpensive ($1000) raid arrays with huge capacities.

Raid 0 with 8 Seagate 7200.11 1.5TB drives with a Dell Perc 5/i 1MB stripe

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Two 1.5TB Seagate 7200.11 drives on the ICH10R in raid 1 make a nice setup. The ICH10R is an on-board semi-hardware raid controller making it a very cheap option to use in any home server. The Seagate 1.5TB drives are one of the highest capacity drives readily available in Q1 2009 and have the best price/GB available. Raid 1 is probably the best way to gain redundancy when there are two disks in the system.

Intel ICH10R Raid 1 w/ 2x Seagate 7200.11 1.5TB 7200rpm drives

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