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Seagate 6TB Enterprise Capacity 3.5 HDD v4 RAID Analysis

By: Paul Alcorn | RAID/HBA in IT/Datacenter | Posted: Sep 26, 2014 1:10 am

RAID 0 128k Sequential Read/Write




128k sequential speed reflects the maximum sequential throughput of the SSD, and is indicative of performance in OLAP, batch processing, streaming, content delivery applications, and backup scenarios. Today's HDDs are increasingly used for sequential workloads as SSDs encroach upon the application space. The four-drive array provides a healthy 850 MB/s, and the eight-drive array pushed that up to a tremendous 1,697 MB/s.




Latency testing reveals expected scaling.




Sequential write performance is important in tasks such as caching, replication, HPC, and database logging. The four-drive array delivers 820 MB/s during the sequential read tests, and the eight-drive array provides 1,631 MB/s.




An interesting phenomenon presented itself during the sequential write testing. The v4 experiences some variability at the onset of heavy write activity for a few seconds, and then resumes normal operation.




Write percentage-testing reveals that while there are large gains in the pure read and write workloads, there is an expected trough in the middle.

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