Durable storage devices exhibit access latencies that are orders of magnitude higher than RAM, varying widely by underlying technology. Intel Optane memory bridges the gap, offering random read and write latencies between $94$ ns and $305$ ns. High-performance NVMe Solid State Drives (SSDs) can perform random $4$ KB accesses in roughly $30$ to $120$ μs, and sequential $1$ MB reads in about $208$ μs. Older SATA SSDs are slower, taking roughly $500$ μs for random access and $2$ ms for sequential reads. Traditional magnetic Hard Disk Drives (HDDs) remain the slowest, requiring roughly $5$ ms for a sequential read and $10$ ms for random access due to physical seek and rotation times.