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Toshiba Q Series Pro 256GB Three-Drive SSD RAID Report

By: Jon Coulter | RAID in Storage | Posted: Aug 6, 2014 2:00 pm

Iometer - Disk Response

 

Version and / or Patch Used: 1.1.0

 

We use Iometer to measure disk response times. Disk response times are measured at an industry accepted standard of 4k QD1 for both write and read. Each test is run twice for 30 seconds consecutively, with a five second ramp-up before each test. The drive/array is partitioned and attached as a secondary device for this testing.

 

Write Response

 

toshiba_q_series_pro_256gb_three_drive_ssd_raid_report_31

 

Read Response

 

toshiba_q_series_pro_256gb_three_drive_ssd_raid_report_32

 

Average Disk Response

 

toshiba_q_series_pro_256gb_three_drive_ssd_raid_report_33

 

Write response times benefit most from RAID 0 because of write caching. There is a slight latency increase in read response times for an array vs. a single drive. Just like we saw from our round of synthetic testing, the Q Series Pro has lackluster read response. Write response is good, but not as good as our other two contenders.

 

 

DiskBench - Directory Copy

 

Version and / or Patch Used: 2.6.2.0

 

We use DiskBench to time a 28.6GB block (9,882 files in 1,247 folders) of mostly incompressible random data as it's transferred from our OS array to our test drive/array. We then read from a 6GB zip file that's part of our 28.6GB data block, in order to determine the test drive/array's read transfer rate. The system is restarted prior to the read test to clear any cached data, ensuring an accurate test result.

 

Write Transfer Rate

 

toshiba_q_series_pro_256gb_three_drive_ssd_raid_report_34

 

Read Transfer Rate

 

toshiba_q_series_pro_256gb_three_drive_ssd_raid_report_35

 

toshiba_q_series_pro_256gb_three_drive_ssd_raid_report_36

 

The Q Series Pro is all about real-world performance. Look at that read transfer performance; it's absolutely stunning. The Extreme II's superior 4k QD1 write performance delivers our best write transfer performance of the group.

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