ReadSpeed results for 4 SSDs (3 types)

[inspapadakis]

4 drives:
1) Samsung SSD 840 EVO 1TB
2) KINGSTON SA400S37240G (240G)
3) identical kingston (another drive)
4) INTEL X25-M SSDSA2M080G2GC (80G) (can do max SATA II - 3Gbps, all others can do SATA III - 6Gbps)

1) Samsung SSD 840 EVO 1TB
First run:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  1.0TB Samsung SSD 840 EVO 1TB       515.6   514.1   525.0   527.5   525.4

Second+ run(s):

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  1.0TB Samsung SSD 840 EVO 1TB       532.0   532.2   543.4   543.4   543.4

2) first drive KINGSTON SA400S37240G (240G)
first run:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  240GB KINGSTON SA400S37240G         262.8   386.6   342.9   457.7   442.4

second run:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  240GB KINGSTON SA400S37240G         265.2   454.3   370.3   517.1   459.0

3) second drive KINGSTON SA400S37240G (240G)
first run:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  240GB KINGSTON SA400S37240G         228.5   303.7   375.5   443.5   291.3

second run:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  240GB KINGSTON SA400S37240G         229.3   318.3   404.8   493.8   291.3

4) INTEL X25-M SSDSA2M080G2GC (80G) (can do max sata2)
first run:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81   80GB INTEL SSDSA2M080G2GC          268.3   274.6   274.6   274.6   274.6

second run:

Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81   80GB INTEL SSDSA2M080G2GC          268.2   274.6   274.6   274.6   274.6

(yeah this baby is still pretty godly)


I'm attaching the raw RS000.TXT to RS034.TXT files of the results, for those who wants all the details, like rs /1, /2, /3, /4, /ident, /verbose

 

[inspapadakis]

I should probably mention that the 840 EVO runs EXT0DB6Q Firmware (the one that does the cell refreshes in the background) so that's why it's fast:

After initially launching in 2013 to great fanfare as an excellent, strong-performing low-cost drive, over the long run performance regressions began to occur in deployed drives that saw the read performance of old data significantly drop. At the heart of the issue was the drive’s relatively uncommon 19nm TLC NAND, which given the combination of small feature size and tighter requirements of TLC, eventually resulted in the drive having to slow down and re-read cells to properly read the charge-decayed cells.

quote from: https://www.anandtech.com/show/9196/samsung-releases-second-840-evo-fix