Orome1 writes: HGST introduced the first 4TB enterprise-class hard drive family, the Ultrastar 7K4000. The Ultrastar 7K4000 family features a 6Gb/s SATA interface and a 64MB cache buffer. It is an Advanced Format drive, using 4096-byte sector size, and is backward compatible with legacy 512-byte sector size by offering built-in 512-byte emulation through the SATA interface. Now IT managers can get 2.4 PBs in the footprint of a standard 19-inch storage rack by stacking ten 4U, 60-bay enclosures. The Ultrastar 7K4000 achieves a 59 percent reduction in watts from peak usage during low RPM idle mode, and uses less than 1W during standby/sleep modes.
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