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SanDisk Ultra Plus 256GB RAID 0 SSD Report - Secondary Volume Benchmarks - Disk Response Times


By: | RAID in Storage | Posted: Nov 20, 2013 2:30 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 5 second ramp-up before each test. The drive/array is partitioned and attached as a secondary device for this testing.

 

 

Write Response

 

sandisk_ultra_plus_256gb_raid_0_ssd_report_35

 

Read Response

 

sandisk_ultra_plus_256gb_raid_0_ssd_report_36

 

Average Disk Response

 

sandisk_ultra_plus_256gb_raid_0_ssd_report_37

 

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. Our array displays excellent write response and average read response times.

 

 

Maximum Disk Response

 

sandisk_ultra_plus_256gb_raid_0_ssd_report_38

 

Maximum disk response times are difficult to nail down because they can vary so much from one run to the next, even when running the same drive.

 

We chart them anyway, because while they may vary from one run to the next, the chart gives us a pretty good overall picture of what to expect from our particular test subject.

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