140TB Hard Drives: Western Digital’s New Tech

Western Digital details a multi-year plan to dramatically increase storage density in traditional hard drives.

• Western Digital plans to utilize heat-assisted magnetic recording (HAMR) technology.
• The company’s roadmap includes drives with up to 14 platters.
• Drives exceeding 100 TB in capacity are anticipated by 2030.
• A new vertical-emitting laser is key to achieving higher areal densities.

Get ready to rethink your storage needs. Western Digital this week unveiled a long-term strategy to push the boundaries of 3.5-inch hard drive capacity, aiming to surpass 140 terabytes in the 2030s. This isn’t just a tweak; it’s a essential shift in how data is stored,relying on a combination of more platters and a novel approach to magnetic recording.

The HAMR Advantage

At the heart of this advancement is heat-assisted magnetic recording (HAMR). For years, increasing storage density on hard drives has hit a physical limit. HAMR overcomes this by using a laser to heat a tiny spot on the disk surface, making it easier to flip the magnetic polarity and store more data. Western Digital’s innovation lies in a new vertical-emitting laser, developed over six years, that delivers thermal energy more efficiently.

what is HAMR? Heat-assisted magnetic recording uses a laser to temporarily reduce the magnetic coercivity of the recording medium, allowing data to be written at higher densities.

Unlike traditional lasers that shine onto the disk from the edge, this vertical laser emits light straight down. This focused approach delivers more thermal energy while taking up less space,enabling areal densities to reach up to 10 TB per platter – a significant leap from the current 4 TB. More density means more data packed into the same physical space, and crucially, it allows for the addition of more platters within the standard 3.5-inch form factor.

roadmap to 140 TB and Beyond

Western Digital’s plan unfolds in stages.The first commercial HAMR drives are slated to arrive in late 2026, offering capacities between 40 and 44 TB using an 11-platter design. Volume production is expected to ramp up in 2027. A 12-platter platform will follow in 2028, boosting capacity to 60 TB. By around 2030, the company anticipates reaching the 100 TB milestone. The ultimate goal? To leverage a 14-platter design and further refinements in HAMR technology to exceed 140 TB per drive.

This roadmap signals a continued commitment to hard drive technology, even as solid-state drives (SSDs) gain prominence. For applications requiring massive, cost-effective storage – think data centers and archival systems – the future of high-capacity storage appears to still be spinning.