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JMicron JMF667H Firmware Preview Testing with L85A, L85C and A19 Flash

By: Chris Ramseyer | SSDs in Storage | Posted: Jun 2, 2014 2:45 am

HD Tune Pro - Sequential Performance

 

Version and / or Patch Used: 4.55

 

jmicron_jmf667h_firmware_preview_testing_with_l85a_l85c_and_a19_flash_52

 

As noted on the previous page, all four drives score well in sequential read tests. Here we see a comparison in HD Tune Pro with 64kB block size tests.

 

jmicron_jmf667h_firmware_preview_testing_with_l85a_l85c_and_a19_flash_53

 

The sequential write performance was all over the map on the previous page, and this chart shows us the same deviation between models. We've suspected for a long time that Toshiba was pulling away from IMFT in flash performance, and this chart really backs up that theory.

 

 

HD Tach – Sequential Write Performance after Random Writes

 

Version and / or Patch Used: 3.0.4.0

 

jmicron_jmf667h_firmware_preview_testing_with_l85a_l85c_and_a19_flash_54

 

For this section, we're using the Toshiba A19 drives to look at performance after a reasonable number of random writes. The larger capacity size drives, regardless of flash type, did very well in this test.

 

jmicron_jmf667h_firmware_preview_testing_with_l85a_l85c_and_a19_flash_99

 

The two smaller capacity drives, both with 128GB of NAND flash, show significant reductions in sequential write performance due to the previous random data writes. This isn't all that odd as we've experienced this issue on several different products over the last couple of years.

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