Yes, I run ZFS on Linux on my single drive laptop currently. ZFS doesn't _need_ multiple drives to work well, but it is capable of using them if they're availa

Yes, I run ZFS on Linux on my single drive laptop currently. ZFS doesn't _need_ multiple drives to work well, but it is capable of using them if they're available. One can also run a HW raid solution underneath ZFS, where the RAID engine just presents ZFS with a small number of LUNs. It's all up to the admin; and what sort of performance, redundancy, and maintenance guarantees are required.