To help reach a conclusion let’s have a look at how the
Samsung PM863 compares to what are arguably its closest competitors, that we
have thus far tested in the ‘Read Intensive’ arena. The following table especially
focuses on characteristics that are important to the Read Intensive market
I have tabulated the following characteristics:
Sequential Read Performance – the 1024K IO Size,
Sequential Read performance, as recorded in our SNIA Throughput Test.
Random 4K 100% Read Performance, as recorded in our
SNIA IOPS Test.
Random 4K 100% Read Power Consumption (IOPS per
Milliwatt) at a Queue Depth of 32, as recorded in our Myce/OakGate 4K Mixed
Sequential Read Power Consumption (MB/s per
Milliwatt) at a Queue Depth of 32 and an IO Size of 32, as recorded in our
Myce/OakGate Sequential Reads Tests.
Quality of Service – the Latency Value which 99.9% of
4K Random Read IOs equals or falls beneath at 80,000 IOPS, as found in our
Myce/OakGate 4K Latency Read Test.
Price – an indication of the retail price (inclusive
of transaction tax) as found via pricespy.co.uk for the 960GB model of each
You can see that this is obviously focusing on Read centric
performance characteristics (arguably some of the most important factors for
the Read Intensive Market Segment). The best result for each characteristic is
highlighted in green.
Some observations –
The Samsung PM863 improves upon its predecessor the Samsung
DC845 EVO in every selected criterion.
The Toshiba THNSNJ960PCSZ beats the Samsung PM863 on power
efficiency and on Quality of Service (as recorded in the specific test being
I am always reluctant to use retail prices for Enterprise
drives that can be found openly on the internet, as I imagine that significant
discounts are available to volume purchasers, however it is apparent from the
prices that I found via pricespy.co.uk that the Samsung PM863 enjoys a
significant price advantage over its competitors.
So, in conclusion I feel that the PM863 is another outstanding
drive from Samsung and I am pleased to award it our highest rating –
p.s. I can’t help feeling that as drive capacities increase,
SATA’s 6GB/s bandwidth constraint will begin to limit the appeal of SATA based
drives (after all as drive capacities increase it follows that the need to
access the data will also increase. For example, if you have currently have 4 x
1TB drives sharing the demand for access and you replace them with one 4TB
drive, the 4TB drive needs to satisfy the demand for access by itself. It will
be interesting to see how the new wave of SAS 3 based drives targeting the read
intensive market will compare, as they offer far higher rates of access. I
notice that Samsung is now offering a new SAS 3 based product – no doubt they see
the writing on the wall. Certainly, the pace of change in the read intensive
market place shows no signs of slowing down.
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