Stefan Mileschin

eagate on Tuesday announced its new generation of hard drives with 15K spindle speed and up to 900 GB capacity. The new HDDs use NAND caching to boost response times, offer additional SED and SED-FIPS security features at no extra cost and boast with enhanced reliability for 24x7 workloads.

The new Seagate Enterprise Performance 15K v6 HDDs come in 300, 600 and 900 GB configurations. Just like their predecessors, they use a dual port SAS 12 Gbps interface as well as a 2.5”/15 mm form-factor. The new Enterprise Performance 15K v6 hard drives have single or dual level caches: either a 256 MB of DRAM cache only or a 256 MB of DRAM cache and a 16 GB of NAND flash cache (4Kn/512E models only). The latter is used for caching of frequently used “hot” data to maximize read performance and reduce latencies (Seagate offers similar capability with its consumer-grade FireCuda and other SSHDs). It is noteworthy that Seagate reduced the amount of NAND flash compared to previous-generation 15K HDDs, but the company seems to believe that its improved caching algorithms will ensure that the new drives are faster than their predecessors.

http://www.anandtech.com/show/10726/...h-nand-caching