ZFS on Linux has exactly this, you can specify specific devices to hold metadata. Caveats apply, you need to mirror those devices for redundancy. https://openz

ZFS on Linux has exactly this, you can specify specific devices to hold metadata. Caveats apply, you need to mirror those devices for redundancy. https://openzfs.github.io/openzfs-docs/man/7/zpoolconcepts.7.html#Special_Allocation_Class https://openzfs.github.io/openzfs-docs/man/7/zpoolconcepts.7...