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Tom’s Hardware
Tom’s Hardware
Technology
Mark Tyson

Toshiba touts industry-first 12-disk HDD stacking technology, will pair with microwave-based recording tech — says advance will enable 40TB drives in 2027

Toshiba Seagate
Toshiba's new 12-disk stacking technology .

10/15/2025 update: The original version of this story incorrectly stated that rival drive makers currently top out at 10 platters. But Western Digital has been shipping 11-platter drives in 32TB (SMR) and 26TB (CMR) since 2024.

Toshiba has announced that it is the first company in the hard disk storage space to “verify 12-disk stacking technology.” Rivals currently aren’t able to squeeze more than 10 or 11 platters in their 3.5-inch HDDs. Thanks to this latest innovation, Toshiba expects to be able to commercialize 40TB HDDs for data centers as early as 2027.

Turn it up to 11? This one goes to 12.

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