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en:blog:2019:2019-09-15 [2020-01-10 17:42]
Decomo 作成 |
en:blog:2019:2019-09-15 [2020-12-04 10:25] (current)
Decomo |
| ====== A Benchmark of SAMSUNG PM983 960GB ====== | ====== Benchmarks of Samsung PM983 960GB SSD ====== |
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| SAMSUNG MZQLB960HAJR-00007 came up across the water. It is SSD of PM983 series for enterprise use, and mine is U.2 connected 960GB model. I haven't been satisfied with present SATA SSD on my server now because I upgraded my LAN to 40GbE, so I couldn't help but get it. | Samsung MZQLB960HAJR-00007 came up across the water. It is one of the PM983 series SSD for enterprise use that has U.2 connector and 960GB capacity. Now I haven't been satisfied with present SATA SSD on my server because I upgraded my LAN to 40GbE, so I couldn't help but get it. |
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| Recent consumer M.2 SSDs are faster than the PM983 in term of simply comparison, but I wanted a reliability-oriented product for enterprise. Then, I found seller tested used one approximate at 10000 yen on ebay, so I had to order it. Though I could also get a brand-new PM963 or PM953 at the same price, their performances are distinct different with PM983. I think it was pretty good deal. The specs is bellow: | Actually recent consumer M.2 SSDs are faster than the PM983 in term of simply comparison, but I wanted a reliability-oriented product to protect my data or avoid unreasonable troubles. Then, I had found seller tested used one approximate at 10000 yen on ebay, so I had to order it. I could also get a brand-new PM963 or PM953 series at the same price, but their performances are distinct different with PM983. I think it was pretty good deal. The specs is bellow: |
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| * Sequential access speed | * Sequential access speed |
| </code>| | </code>| |
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| The SSD's cache capacity is unknown. | A cache capacity on the SSD is unknown. |
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| Its speed was stable in 1GB test as far as I tested it several times with CrystalDiskMark. However, in 32GB test, there were variation result particularly on write speed. It was because of a cache overflow, I guess. It slowed down to 60MB/s in the worst case of a 4K1T writing test. | Its speed was stable in 1GB test as far as I tested it several times with CrystalDiskMark. However, in 32GB test, there were variation result particularly on write speed. It was because of a cache overflow, I guess. It slowed down to 60MB/s in the worst case of a 4K1T writing test. |
| For your information, a result the SSD connected with PCIe 2.0x4 is below: | For your information, a result the SSD connected with PCIe 2.0x4 is below: |
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| <align center> | <WRAP centeralign> |
| {{:blog:2019:mzqlb960hajr-00007_cdm_1g_pcie2.png?350|}}{{:blog:2019:mzqlb960hajr-00007_cdm_32g_pcie2.png?350|}} | {{:blog:2019:mzqlb960hajr-00007_cdm_1g_pcie2.png?350|}}{{:blog:2019:mzqlb960hajr-00007_cdm_32g_pcie2.png?350|}} |
| </align> | </WRAP> |
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| Initially I didn't know the reason why the SSD was slow because I didn't notice it was connected with PCIe 2.0. | Initially I didn't know the reason why the SSD was slow because I didn't notice it was connected with that. |
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