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Intel 730 480GB 6-Drive SSD RAID Report

By: Jon Coulter | RAID in Storage | Posted: Jun 20, 2014 10:12 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 5 second ramp-up before each test. The drive/array is partitioned and attached as a secondary device for this testing.

 

Write Response

 

intel_730k_480gb_6_drive_ssd_raid_report_31

 

Read Response

 

intel_730k_480gb_6_drive_ssd_raid_report_32

 

Average Disk Response

 

intel_730k_480gb_6_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.

 

 

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 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

 

intel_730k_480gb_6_drive_ssd_raid_report_34

 

Read Transfer Rate

 

intel_730k_480gb_6_drive_ssd_raid_report_35

 

intel_730k_480gb_6_drive_ssd_raid_report_36

 

We are only charting transfer up to a three drive array for the simple reason we don't have anything fast enough to feed an array of more than 3 drives. We are transferring data from a 3-drive array to a 3-drive array. Read transfers scale very well, but write transfers are handicapped by SATA architecture's single lane signaling.

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