cross-posted from: https://beehaw.org/post/24650125
Because nothing says “fun” quite like having to restore a RAID that just saw 140TB fail.
Western Digital this week outlined its near-term and mid-term plans to increase hard drive capacities to around 60TB and beyond with optimizations that significantly increase HDD performance for the AI and cloud era. In addition, the company outlined its longer-term vision for hard disk drives’ evolution that includes a new laser technology for heat-assisted magnetic recording (HAMR), new platters with higher areal density, and HDD assemblies with up to 14 platters. As a result, WD will be able to offer drives beyond 140 TB in the 2030s.
Western Digital plans to volume produce its inaugural commercial hard drives featuring HAMR technology next year, with capacities rising from 40TB (CMR) or 44TB (SMR) in late 2026, with production ramping in 2027. These drives will use the company’s proven 11-platter platform with high-density media as well as HAMR heads with edge-emitting lasers that heat iron-platinum alloy (FePt) on top of platters to its Curie temperature — the point at which its magnetic properties change — and reducing its magnetic coercivity before writing data.
Network? Nah, the bottleneck is always going to be the drive itself. Storage networks might pass absurd numbers of Gbps, but ideally you’d be resilvering from a drive on the same backplane, and SAS-4 tops out at 24 Gbps, but there’s no way you’re going to hit that write speed on a single drive. The fastest retail drives don’t do more than ~2 Gbps. Even the Seagate Mach.2 only does around twice that due to having two head actuators.