There are popular tape device ArVid which based on ordinary (PAL/SECAM) VHS & ISA board with PLM which often used in Russia and xUSSR. ArVid board are controled by VHS behind integrated multisystem IRC node. I've coded raw driver for this device. Driver
The cache-optimized concurrent skip list is a set of algorithms for maintaining dynamic ordered mappings. Top-down balancing algorithms minimize cache-misses while using a per-node read-write spinlock to coordinate shared access. Designed for Linux 2.4.