A Marvell PC and AMD PC

[Tazz]

No problems at all


Marvell PC with one Marvell port in IDE mode and another in AHCI mode:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  250GB Samsung SSD 860 EVO 250GB     543.5   543.0   544.3   544.4   544.3
 82  1.0TB WDC WD1001FALS-00E8B0         108.9   104.0    94.9    80.4    56.7
 83  1.0TB WDC WD1002FAEX-00Y9A0         136.8   124.0   109.8    93.0    65.0
 84  1.0TB Samsung SSD 860 EVO 1TB       543.4   544.5   543.1   544.5   544.5
 85  128GB Samsung SSD 840 PRO Serie     274.2   274.3   274.3   274.3   274.3
 86  1.0TB WDC WD10EZEX-00WN4A0          184.7   166.4   148.7   125.2    88.2
 87  1.0TB WDC WD10EZEX-00WN4A0          188.3   170.5   152.0   127.3    90.2

                  Benchmarked: Saturday, 2020-12-26 at 16:20

AMD PC:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  250GB Samsung SSD 840 EVO 250GB     539.5   534.1   537.5   546.2   546.1
 82  6.0TB WDC WD60EFAX-68SHWN0          189.8   152.2   380.6   379.9   377.2
 83  2.0TB WDC WD20EZRZ-00Z5HB0          153.3   140.9   123.4   102.1    73.0
 84  2.0TB Hitachi HUA723020ALA641       146.4   136.9   121.2    99.6    71.5
 85  2.0TB WDC WD20EZRX-00D8PB0          149.2   135.2   116.8    97.8    71.4
 86  6.0TB ST6000VN0033-2EE110           231.1   218.5   198.5   166.1   117.1
 87  6.0TB ST6000VN0033-2EE110           223.4   213.2   193.2   160.3   113.2

                  Benchmarked: Saturday, 2020-12-26 at 16:29

 

[PHoganDive]

Drive 82 on the AMD system has strange results, it jumps up to 300+MB at 50% onward...maybe seeing some caching benefit?

 

[Steve]

Drive 82 on the AMD system has strange results, it jumps up to 300+MB at 50% onward...maybe seeing some caching benefit?

Sharp eyes, @PHoganDive We saw this during the pre-release testing. That drive uses SMR technology — shingled magnetic recording. These drives are weird ducks and they will be needing some special attention from SpinRite. Believe it or not, that drive “knows” that those regions of the drive are empty, so it doesn't even bother moving its heads and reading the media. It simply returns zeroes. Since it doesn't need to read anything, it appears to be super fast! Weird, huh?

 

[pmikep]

I have removed my content