Seagate Constellation.2 and Constellation ES.2 Hard Drive Review Discu
Posted 31 May 2011 - 01:52 PM
Seagate's Constellation enterprise hard drives come in 6Gbps SAS and SATA interfaces; we pit them against one another using the second-gen Constellation.2 2.5" drive and fifth-gen Constellation ES.2 3.5" drive. The following models are participating in this review:
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Posted 03 June 2011 - 01:32 PM
Psst, your part #s aren't quite right... Seagate ends drives with "NS" for nearline SATA, and "SS" for SAS. The 650 vs. 651 at the end indicated cache or something being different, I forget what it was...
Power consumption does look good and I see these drives are down to $330 each, which isn't bad. I wonder when the 1TB/platter nearline drives will hit (I could use a 4x1TB platter nearline...).
Also any other benchmarks of their competition? I just noticed the performance database isn't the place to go for that... although I don't think SR has reviewed the Ultrastar 7K3000 or anything so maybe not yet?
Posted 04 June 2011 - 04:43 PM
I am not sure it could be counted as a driver quirk on our system when the Constellation.2 SAS didn't have the same problem. If you look at the server charts the only one it maintained a similar speed to the rest of the group was the web-server which stands out being the only real-only test, with the others being a mix of R/W.
Posted 04 July 2011 - 11:23 PM
Just wondering if anything further has come out of this. I was just about to buy 14 of these and I'm glad I checked out the review.
HP Proliant ML370 G6, 2x Xeon X5690, 144GB RAM, GeForce 580 GTX, 8x OCZ Vertex 3 MAX IOPS 240GB on LSi 9265-8i 1GB w/Fastpath, 12x Seagate Constellation ES.2 3TB SAS on LSi 9280-24i4e 512MB, 2x 1200W Redundant Power Supply, 2x NEC LCD3090WQXi monitors
Posted 05 July 2011 - 02:53 PM
Posted 06 July 2011 - 12:03 PM
Going to shoot a question over to them again today and see if we can get a replacement to re-test.
Hi Kevin - I thought I'd come check out the forums here as it's been awhile. In anycase, I checked and heard back from Seagate engineering and they stated that on many of the SAS models, the prescan feature is turned on by default. This forces a read after every write and is a data-integrity checking feature. This would explain the 'flat line' experience of the 3TB model in one of the performance benchmarks. Our SAS manual talks about enabling/disabling various features through a sw utility, but we'll go ahead and send over another set so that you can test the drives with prescan off.
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