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Adaptec by PMC ASR-8885 12Gb/s RAID Controller Review

By: Paul Alcorn | RAID/HBA in IT/Datacenter | Posted: Nov 18, 2013 2:00 pm
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TweakTown Rating: 92%Manufacturer: Adaptec by PMC

RAID 0 128K Sequential Read/Write

 

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The 128K read sequential speeds reflects the maximum sequential throughput of the SSD using a file size encountered in an enterprise scenario. The Micron's pull ahead in this test, leveraging their impressive read speed, topping out at 6,080 MB/s, while the HGST array peaks at 5,875 MB/s. We are clearly bumping up against controller limitations with both SSD arrays saturating the controller.

 

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128k read latency results indicates the HGST SSD's are more nimble at lower Queue Depths, where the controller has fewer devices to manage. Both arrays reach the best IOPS/latency ratio at QD128.

 

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HGST array reaches the maximum speed of the controller with 5,198 MB/s, and peaks as high as 5,645 MB/s at QD256. The Micron array tops out at 2,771 MB/s, which leaves quite a bit of performance lost in the scaling of the controller. With each P400m conservatively rated at 310 MB/s of sequential write speed we should hit at, or above, 4,960 MB/s.

 

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