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The Seagate Cheetah ST3300655SS is a 3.5-inch enterprise hard drive built for 24/7 server duty. Its 15,000 RPM spindle and 16MB cache deliver low latency and fast random access, which is why it was a standard choice for database and transaction servers. It uses a SAS 3Gb/s interface, so it needs a SAS controller or backplane; it will not plug into a consumer SATA port. Against 10K and 7.2K drives it wins on access time but loses on capacity per watt, and it is loud and hot compared with modern SSDs.
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Lowest price we've seen: $70.00 on Nov 10 at Newegg. Tracked across 1 store since Nov 10.
Owners of 15K Cheetah drives describe them as fast for their era and reliable in server roles, but loud and power-hungry. Most current feedback comes from people buying used units for legacy servers, who warn that age and spindle hours matter more than the spec sheet.
