HGST
HGST Ultrastar He6 6TB SAS 7.2K 3.5" LFF Enterprise HDD (HUS726060ALS640) - Helium-Sealed, Server Pull
HGST Ultrastar He6: World's First Helium-Sealed Enterprise HDD
This is a used, server-pull HGST Ultrastar He6 6TB SAS hard drive. Tested working. Helium-filled design delivers lower power consumption, reduced temperature (4-5°C cooler than air-filled drives), and improved reliability — ideal for datacenters.
Key Specifications:
- Brand: HGST (Hitachi / Western Digital)
- Model: Ultrastar He6
- Part Number: HUS726060ALS640 (0F18370)
- Capacity: 6TB
- Interface: SAS 6Gbps
- Speed: 7,200 RPM
- Form Factor: 3.5" LFF (Large Form Factor)
- Sector: 512-byte native (512n)
- Cache: 64MB
- Technology: HelioSeal (helium-filled)
- Power: 5.3W idle, reduced thermal output
Why Helium Matters: Helium has 1/7 the density of air. This reduces drag on the spinning platters and read/write heads, cutting power consumption by 23% and operating temperature significantly. HGST pioneered this technology in the Ultrastar He6 — the first 6TB drive in a 3.5" form factor, delivering 50% more capacity than competing 4TB drives while consuming less energy.
Server Compatibility: Fits 3.5" SAS drive bays in Dell, HPE, Supermicro, and other enterprise servers and storage arrays. Bare drive — caddy/tray sold separately.
Condition: Used, server pull. Tested functional. No retail packaging or accessories. Normal handling marks may be present.






