Hybrid engines had largely gone out of fashion since their heyday in the early and mid-2010s. The promise then was similar to what Seagate offers today. A large HDD is combined with a smaller SSD and delivered to the user as a single storage pool. Apple introduced its own hybrid solution in 2012 with the Mac mini’s Fusion Drive. When Ars opened a drive, the Fusion Drive system was found to write in hierarchical 128 KB blocks. Information was typically written first to the SSD and then migrated to the HDD as needed. If the files were used frequently, they might find a more permanent location on the SSD side.
As SSD storage became cheaper and cheaper, the hybrid approach was largely abandoned. Fast forward to our current storage cost predicament in 2026, and Seagate’s line of thinking that everything old is new is starting to hold water. All storage costs have exploded, but the calculations from 2012 still work today. NAND flash is still fast, but expensive, and traditional mechanical drives are at least relatively cheaper per TB for higher capacity storage.
The problem with Apple’s Fusion solution was its fragility. If one of the two drives failed, it probably did. Recovery depended on joining the two disks into a single volume. If one of these two drives experienced a physical failure, recovery became difficult since the remaining working drive was dependent on data from the now-failed drive to rebuild the complete system image.
According to Seagate’s press release, the Alkemi intelligent storage platform takes a different approach. Where Apple’s Fusion Drives used tiering managed by macOS, Alkemi manages the storage pool directly from the box. Seagate says: “Alkemi learns and adapts over time to keep high-demand content fast and accessible on a user’s SSD, while the hard drive provides space for growing libraries. Behind the scenes, Alkemi manages data placement, giving users the simplicity of a single storage drive.” The PDF product data sheet from the FireCuda Forge website describes the Alkemi system as a two-tier storage system, but does not further specify whether the system uses SSD caching, automated tiering, a combination of the two, or something else.
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