OWC Mercury Accelsior E2 PCIe SSD Review – Dual eSATA Performance of 780MB/s Tested and Approved

Performance testing the new Accelsior E2 simply consisted of testing the eSATA transfer speeds alone, both in system and Helios to make sure they matched which they did.  Detailed performance of the Accelsior alone is available in our Accelsior Review, just as PCIe performance, via Thunderbolt, is available in the OWC Helios review. For our tests, we used two Intel DC S3700 800GB SSDs in RAID 0, both of which we had reviewed previously as well.

OWC Accelsior E2 With Intel DC S3700

ATTO DISK BENCHMARK VER. 2.46

ATTO Disk Benchmark is perhaps one of the oldest benchmarks going and is definitely the main staple for manufacturer performance specifications. ATTO uses RAW or compressible data and, for our benchmarks, we use a set length of 256mb and test both the read and write performance of various transfer sizes ranging from 0.5 to 8192kb. Manufacturers prefer this method of testing as it deals with raw (compressible) data rather than random (includes incompressible data) which, although more realistic, results in lower performance results.

INtel DC S3700 RAID 0

RAID 0 performance of 783MB/s read and 761MB/s write is an excellent start and was unexpected through eSATA to say the least.

CRYSTAL DISK BENCHMARK VER. 3.0 X64

Crystal Disk Benchmark is used to measure read and write performance through sampling of raw (0/1 Fill/compressible) or random data which is, for the most part, incompressible. Although both are very close, we provide compressible results on the left with incompressible on the right below:

OWC Accelsior SSD CDN 0FillOWC Accelsior SSD CDN RandomTypically, we might see lower test results in Crystal Diskmark, however, these are a bit lower than expected.  This could be a result of the storage medium used which has quite a few hours of testing under their belt (Intel SSDs).

ANVIL STORAGE UTILITIES PROFESSIONAL (BETA)

We elected to conduct Anvil Storage testing with 100% incompressible data just to give all a good look at the Accelsior at its best.  Full identification of the system and drives in use is available on the bottom left and right of the result.

OWC Accelsior E2 Anvil Testing

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CharlesAnderson
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CharlesAnderson

Do the eSATA ports support cabinets with port multipliers?

Les@TheSSDReview
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It is found on their product pages fineprint and we just received confirmation that it doesn’t support port multipliers.

CharlesAnderson
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CharlesAnderson

Thanks. I saw that after I posted my question. Sorry for the extra effort on your part.

Joe
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Joe

Have you tested this beyond the initial testing? I’ve had 3 of these drives fail me in 2 years. Wondering if others have had similar experience or if mine is a fluke. They want to send me another replacement (they have to because it’s under warranty anyways), and I’ll get it, but I’m leary of even installing it after 3 failures

Les@TheSSDReview
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Typical review agreements with a few companies is simply that the equipment be returned after the review; this is the case with OWC. WE had not done any extensive testing.

Joe
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Joe

That’s too bad. I agree with all of your review, but it’s too bad the drive fails after a year. Have you reviewed any comparable PCIE SSD’s for mac?

Steve Joseph
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I find this to be one of the core problems with many reviews or the window and time frame for reviews and I do wish long term testing were more the norm. Regardless I do have to thank you for your comment though because based on what you and Wayne have said I need to do way more research to see if I can understand the problem. Is it the SSD’s that are bad or the cards have some flaw in the design that produces increased stress in a machine with an older architecture and this causes the card to… Read more »

Wayne Granzin
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Wayne Granzin

i’m a very long-term owc/macsales customer. i bought the 480gb e2 last year and it “failed” about 6 months later. what happened was: i came back to the machine after it was in sleep mode (yes, i’d installed the accelsior software) and it was mostly unresponsive. SBBOD for minutes after each mouse click. would accept switching applications. would get maybe one click or move with each before going unresponsive. so i rebooted the machine. after reboot, machine was functional but still sluggish. so as a precautionary measure. i quickly backed up the critical client files that were still on it.… Read more »

Philippe Schaedler
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Philippe Schaedler

I bought the 960GB December 2015 from OWC – installed it right away today March 17th it failed the second time – first I was able to repair the disk with disk utility – but was much slower than original install – today white screen – I have to erase the disk and migrate – VERY disappointed OWC – Called them they said it had to do with making a carbon copy of the old drive – and seeing in this forum that this is a common occurrence, I will ask for my 658.- back –

fungus amungus
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fungus amungus

I was just yesterday reading that the major downfall of the SSD Raid 0, Dual Drive Setup up is that they’re prone to Failure. This was not an OWC Customer or Product, but the Manufacturer of a PCIe Solo and Dual Cards. The same statement did not appear along with the Ad for the Solo Tray, which makes me think that there may be a Bug of some type still undetected. Not a “Bug” – Bug, but a Glitch causing the failure. It may be that even using identical Drives from the Same Mfg. may still have enough variations to… Read more »