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Toshiba MK01GRRB/R 2.5-inch 6Gb/s SAS 15K RPM Enterprise RAID Report - 4K Random Read/Write


By: | RAID/HBA in IT/Datacenter | Posted: Mar 15, 2013 1:49 pm

4K Random Read/Write

 

toshiba_mk01grrb_r_2_5_inch_6gb_s_sas_15k_rpm_enterprise_raid_report_05

 

Each QD for every parameter tested includes 300 data points (five minutes of one second reports) to illustrate the degree of performance variability. The line for each QD represents the average speed reported during the five-minute interval.

 

4K random speed measurements are an important metric when comparing drive performance, as the hardest type of file access for any storage solution to master is small-file random. One of the most sought-after performance specifications, 4K random performance is a heavily marketed figure.

 

The read performance scales well, with a nice tight distribution of performance. We can observe that the 8-drive configuration averages 4,100 IOPS, the 5 drive 2,500 IOPS and the 3-drive configuration averages 1,600 IOPS.

 

toshiba_mk01grrb_r_2_5_inch_6gb_s_sas_15k_rpm_enterprise_raid_report_06

 

The 8-drive configuration, in dark blue, dominates the write testing. The 3 and 5 drive raidsets perform well, but do not scale as well at the lower queue depths. The 8-drive configuration tops out at an average of 1053 IOPS at QD 256, 5 drives come in at 600 IOPS, and the 3 drive musters 511 IOPS.

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