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RAID Report: Native mSATA RAID 0 w/ Samsung 840 EVO 250GB SSD's (TweakTown Exclusive)

By: Jon Coulter | RAID in Storage | Posted: Feb 11, 2014 7:00 pm

Iometer

 

Version and / or Patch Used: 1.1.0

Product Homepage: http://www.iometer.org

Download here: http://sourceforge.net/projects/iometer

 

Iometer is an I/O subsystem measurement and characterization tool for single and clustered systems. It was originally developed by the Intel Corporation, and announced at the Intel Developers Forum (IDF) on February 17, 1998; since then it's become wide spread within the storage industry.

 

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

 

raid_report_native_msata_raid_0_w_samsung_840_evo_250gb_ssd_s_tweaktown_exclusive_34

 

Read Response

 

raid_report_native_msata_raid_0_w_samsung_840_evo_250gb_ssd_s_tweaktown_exclusive_35

 

Average Disk Response

 

raid_report_native_msata_raid_0_w_samsung_840_evo_250gb_ssd_s_tweaktown_exclusive_36

 

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. Response times are excellent despite the drives' TLC NAND array.

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