xraid
FUSE program to assemble RAID-0 with any chunk size
mdadm is great for assembling RAID devices, but there's on edrawback: It can't work with chunk sizes below 4K. While this a rare case, it nevertheless exists. This where xraid may help you. It allows to assemble any number of RAID-0 member and lets you access the resulting RAID device via FUSE. Fast and without RAM nor storage space usage.