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Seagate's 6th gen disk drives boost storage capacities by 50 percent

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October 26, 2016

We've noticed today that Seagate's new sixth generation Enterprise Performance disk drives can increase the storage capacity by 50 percent, up to 900 GB and also boost data transfer speeds past the 300 MB per second mark.

These are small form factors or 2.5-inch drives spinning at 15,000 RPMs with 300 GB, 600 GB and 900 GB capacity points.

The prior 5th generation series topped out at 600 GB and their sustained transfer data rates (outer to inner diameter) was 246-180 MiB/sec.

The new drives, using the same 12 Gbit/s SAS interface, can reache 300-210 MB/sec in the 512e format, and 315-215 MB/sec in the 4Kn/512e format.

A cache jump from 128 MB to 256 MB helps this as does TurboBoost read caching technology in the 4 Kn format mode. There are better write caching algorithms as well. The average latency is 2ms.

The drive has one 300 GB platter and 2 heads at the 300 GB capacity, 2 platters and 4 heads at 600 GB, and 3 platters and 6 heads at the 900 GB level, as could be expected by this design.

This new generation 6 drive has a two million hours MTBF rating, a 0.44 percent annualized failure rate, and a five-year limited warranty. There is a self-encrypting version that is also available.

For now, Seagate has no competition at the 900 GB 15,000 RPM product level. Western Digital's HGST Ultrastar C15-K600 is a 15,000 RPM 2.5-inch drive that tops out at 600 GB.

Toshiba's AL-13SX is also a 600 GB, 15,000 RPM drive. Like the WD one, it uses the same 12 Gbit/s SAS interface as Seagate's latest product.

Similarly, we might see a 900 GB version of this drive as well. This new 900 GB drive from Seagate may possibly be its last such drive made, as SSDs are replacing performance disk drives pretty fast these days.

Source: Seagate.


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