Is this transfer speed correct?!

[hoofinrocket]

Hey,
My speeds compared to others on the forum seems incredible high. Granted it is a decent production server but here are the results for x2 WD Gold spinners and x2 Samsung SSD EVOs.

Intel Xeon E3-1240 @ 3.4GHz
32GB Mem

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  1.0TB WDC WD1003FBYZ-010FB0        1643.0  1529.6  1321.9  1152.8   782.5
 82  2.0TB WDC WD2005FBYZ-01YCBB3       2513.9  2403.4  2174.0  1813.3  1315.4
 83  1.9TB Samsung SSD 860 DCT 1.92T    6871.4  6859.4  6848.7  6848.9  6874.1
 84  1.9TB Samsung SSD 860 DCT 1.92T    6856.0  6849.3  6839.7  6841.9  6867.1

                  Benchmarked: Wednesday, 2021-01-06 at 18:49

A second attempt with similar results.

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  1.0TB WDC WD1003FBYZ-010FB0        1643.0  1529.6  1321.9  1152.8   782.1
 82  2.0TB WDC WD2005FBYZ-01YCBB3       2518.0  2403.4  2174.0  1821.8  1315.4
 83  1.9TB Samsung SSD 860 DCT 1.92T    6871.3  6858.7  6849.7  6850.2  6874.1
 84  1.9TB Samsung SSD 860 DCT 1.92T    6859.6  6852.9  6844.4  6846.7  6871.0

                  Benchmarked: Wednesday, 2021-01-06 at 19:00

 

[AlanD]

Those speeds do seem very high. How are the disks connected? SATA III should have a maximum speed of 6Gb/s which should give you just under 600MB/s. Your figures seem to be about 10 times that. NVMe drives should be faster, but ReadSpeed does not detect those yet.

 

[rfrazier]

PCI cards? Ram disk? Ram cache?

May your bits be stable and your interfaces be fast. Ron

 

[PHolder]

@Steve, you should look at these numbers. I wonder if there is some clock weirdness with the Xeon or something?

 

[hoofinrocket]

Hey,

The mobo is a S1200V3RPL, so all SATA 3 ports.
The drives are in a hot swap cage with what looks like a G15584-301 Hot-Swap backplane.
The backplane has a single connection to a breakout of the x4 SATA-3 ports on the mobo.

No PCI Cards, No RAM disk. No ram cache that I am aware of, but can not guarantee
No NVME either.

Ya, these numbers seem off, unless I am getting 54Gb/s! Haha, i may need to put it in a freezer so my tower doesnt melt down.

 

[Steve]

@hoofinrocket : Interesting. The most likely cause is a failure of the benchmark to establish its timebase. While the benchmark is running, what's shown on the very top line of the display about the benchmark's timing resolution??

 

[hoofinrocket]

Hey Steve,
I do not recall what was at that top for the first/second runs. However, I powered everything off, reboot and and re-ran the benchmarks (standar windows troubleshooting ). I am now getting the results I would expect. Also, the top bar was showing +/-149 picoseconds which I believe to be correct on the re-run.
Thanks for your time and work!

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  1.0TB WDC WD1003FBYZ-010FB0         127.7   118.9   102.8    89.6    60.8
 82  2.0TB WDC WD2005FBYZ-01YCBB3        192.0   182.6   166.0   139.5   101.8
 83  1.9TB Samsung SSD 860 DCT 1.92T     533.9   533.1   532.2   532.3   534.1
 84  1.9TB Samsung SSD 860 DCT 1.92T     533.2   532.8   532.0   532.1   534.1

                  Benchmarked: Wednesday, 2021-01-06 at 21:40

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  1.0TB WDC WD1003FBYZ-010FB0         127.7   118.8   102.8    89.6    60.8
 82  2.0TB WDC WD2005FBYZ-01YCBB3        195.8   186.9   169.0   141.5   102.2
 83  1.9TB Samsung SSD 860 DCT 1.92T     534.0   533.1   532.3   532.4   534.2
 84  1.9TB Samsung SSD 860 DCT 1.92T     533.0   532.5   531.9   532.0   533.9

                  Benchmarked: Wednesday, 2021-01-06 at 21:43

 

[rfrazier]

@hoofinrocket if you are getting 54 Gbps: 1) patent it. 2) seek venture capital. 3) get body armor. Somebody might see that as a threat to business.

May your bits be stable and your interfaces be fast. Ron

 

[AlanD]

Those figures now look reasonable - good but within expectations. I am guessing that the 1TB disk is a little older.

 

[Steve]

@hoofinrocket : Thanks for your follow-up on this weird outcome. Since we've never seen this before and since it didn't repeat, I'm okay with considering this to be a "one off." Thanks!