Seagate's new Enterprise Capacity 2.5" HDD v3 offers up to 2TB of density in the compact 2.5" form factor. The 7,200-RPM Enterprise Capacity v3 is geared for the capacity segment, but also offers impressive best-in-class performance, and a 50% improvement in watts-per-TB. The third-generation Enterprise Capacity 2.5 is designed for maximum capacity entry-level servers, blade servers, SAN, and NAS applications.
SSDs are unquestionably penetrating further into the performance 2.5" segment. While SSDs are coming in larger capacities as of late, 2TB capacity points have not become pervasive, and overall NAND production is not even close to providing enough Exabytes of storage to unseat the venerable HDD. Another advantage for the Enterprise Capacity v3 lies in its High Availability features delivered via 6GB/s SATA, or dual-port 12Gb/s SAS connections.
One of the primary reasons for the surge in SSD adoption is fierce competition between foundries, leading to more palatable price points for consumers, but many of the value segment SSDs continue to feature the SATA connection. SAS SSDs also have value options, but they command a higher price point, which leads plenty of room for higher-capacity SAS HDDs in the datacenter. Offering 2TB in a small form factor also opens up more opportunities in dense system designs, and incorporates well into slim 1U and 2U servers.
The Enterprise Capacity v3 also offers lower power consumption during active and idle operating states. With Seagate's proprietary PowerChoice technology, the Enterprise Capacity v3 can idle as low as 1.52 watts. We cover PowerChoice in more detail on the following page. Seek times remain similar to the 3.5" class SSDs, but the sequential performance is somewhat lower than larger HDDs at 136 MB/s. This is still an 18% performance improvement over the previous generation. The v3 supplants the Constellation.2, which also offered both 6Gb/s SAS and SATA. The new v3 version also features a 128MB multi-segmented cache.
Reliability weighs in with a standard 1.4 million hours MTBF, and a one per 10^15 UBER rating. The Enterprise Capacity also features a five-year warranty. SED (TCG-compliant) and FIPS 140-2 options protect data, and ease drive-retirement and repurposing. The v3 also features Seagate Instant Secure Erase, which renders all data on the drive unreadable in less than one second.
The Enterprise Capacity v3 also supports RAID Rebuild. RAID Rebuild is part of the SAS standard that is now supported by the major RAID controller vendors. RAID Rebuild enables communication between the drive and the RAID controller to perform surgical rebuilds in lieu of rebuilding the entire array. This can alleviate the lengthy performance-sapping rebuild process in many cases.
In today's article, we compare the diminutive 2TB Enterprise Capacity v3 to its larger companion, the 3.5" 6TB Enterprise Capacity v4, and a previous-generation 4TB Constellation ES.3. This Seagate-only test pool will highlight the difference between the 2.5" and 3.5" offerings, and analyze improvements over previous generation drives. First, let's take a closer look at the Enterprise Capacity v3.
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- Page 1 [Introduction]
- Page 2 [Enterprise Capacity 2.5 HDD Internals and Specifications]
- Page 3 [Test System and Methodology]
- Page 4 [Benchmarks - 4k Random Read/Write]
- Page 5 [Benchmarks - 8k Random Read/Write]
- Page 6 [Benchmarks - 128k Sequential Read/Write]
- Page 7 [Benchmarks - Database/OLTP and File Server]
- Page 8 [Benchmarks - Email Server]
- Page 9 [Final Thoughts]
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