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The Seagate Constellation ES.3 is a 3.5-inch enterprise hard drive: 2TB, 7200 RPM, SATA 6Gb/s and a 128MB cache. It uses 512-byte native sectors (512n), so it works with older controllers and operating systems that choke on 4Kn drives. It is built for servers, NAS boxes and desktops that need bulk spinning storage, not for laptops or speed-critical work. Against today's large-capacity drives it is a modest, older-generation part, but the 512n format and the enterprise rating are what set it apart for legacy hardware.
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Owners of this class of Seagate enterprise drive generally report steady long-term service in servers and NAS units, with the 512n format praised for compatibility. Complaints center on noise and on failures after years of heavy use.
This is the Seagate Constellation ES.3 Series hard drive, model 9ZM175-552. It is a 3.5-inch internal drive with 2TB of storage.
The drive spins at 7200RPM and connects over SATA 6Gb/s. It has a 128MB cache and a 512n sector format.
