WD Ultrastar DC HA340 Data Center Hard Drive — 8TB, SATA — enterprise 3.5-inch CMR HDD for servers and heavy-duty storage
Free US shipping through Dec 31, 2026
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Free US shipping through Dec 31, 2026 · 90-day worry-free returns — free return label, no restocking fee · Refund released at your return’s first carrier scan · Arrives damaged or defective? We make it right — Returns, Made Simple
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An actual data center drive for builders who want data center manners in their own rack. The Ultrastar DC HA340 is an air-filled CMR drive spinning at 7,200 RPM with a 256MB cache, rated for workloads up to 550TB per year and a projected 2.0M-hour MTBF. WD lists transfer rates up to 267MB/s, rotation-vibration sensors and a 5-year limited warranty. It is overbuilt for a gaming PC's bulk library - which is exactly the point if this drive will hold a media server, NAS or backup target that never sleeps.
This is the drive class that fills data centers, sized for builders running serious storage at home or in a small business: a media server that serves the whole house, a backup target for several machines, a surveillance recorder, or a virtualization host that keeps a shelf of virtual machines on one spindle. The HA340 is an air-filled, CMR design, so sustained writes stay consistent when a backup window or a RAID rebuild asks for hours of full-tilt throughput.
The enterprise ratings are the real story. WD rates the family for workloads up to 550TB per year with a projected 2.0M-hour MTBF, and rotation-vibration sensors help the drive behave when it shares an enclosure with neighboring drives — the exact condition that makes desktop drives age early. At 7,200 RPM with a 256MB cache and transfers up to 267MB/s, it also answers faster than the 5,400 RPM bulk drives it will usually sit next to.
You give up nothing on fitment: it is a standard 3.5-inch SATA drive that mounts in any NAS, server or desktop bay with SATA power and data. A 5-year limited warranty matches the duty cycle it was built for. Choose the 8TB HA340 when the array is infrastructure — the thing everything else depends on — rather than a place to park files you could re-download.
Specs: 8TB | 3.5in SATA | 7,200 RPM | 256MB cache | CMR | up to 267MB/s | Part # 0B47078
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