128k Sequential Read/Write
The 128k sequential speeds reflect the maximum sequential throughput of the HDD using a realistic file size encountered in an enterprise scenario.
In this test, the Savvio 15K.3 shows its age. It is outstripped by the Enterprise Performance 10K, which has more to do with the speed increase in the much newer 10K HDD than a weakness in the 15K.3. The SSHD chugs along with a beastly 243 MB/s average.
The 15K.3 again lags with an average of 187 MB/s, and the SSHD continues its dominance with almost 242 MB/s. We can see the data travel across the platter of the SSHD during each test iteration. The higher results from the outer tracks come first, and then the speed lowers as it moves to the inner tracks.
The mixed sequential write testing reveals very strong performance from the Enterprise Performance 10K, which manages to shadow, or beat, its 15k counterpart in much of the chart. The Turbo SSHD actually falls to the 15K.3 and the 10K in the 80-90 percent range, the only weakness that we have ever observed with the SSHD. The algorithms in the SSHD do not cache sequential data, bringing it down to earth with the rest of the mere mortals in this small area.
The 15K.3 continues its trend of having the lowest power consumption with an average of 6.9 watts.
The SSHD pulls ahead in efficiency in this test with an average of 32 MB/s per watt.
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- Page 1 [Introduction]
- Page 2 [Savvio 15K.3 Internals and Specifications]
- Page 3 [Test System and Methodology]
- Page 4 [4k Random Read/Write]
- Page 5 [8k Random Read/Write]
- Page 6 [128k Sequential Read/Write]
- Page 7 [Database/OLTP and Web Server]
- Page 8 [Email Server]
- Page 9 [Final Thoughts]
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