MicroNet has begun selling the SR-4 Blackbird, a compact RAID array that weighs approximately 12 pounds. The unit holds four drives for a maximum capacity of 4TB, and uses eSATA-300, with a "pure" SATA II architecture inside that eliminates bridges and protocol conversions. Combined with a 16MB cache, the SR-4 can read data at speeds of up to 240MBps, and write at approximately 200MBps. Each version of the array comes bundled with an eSATA RAID controller, can be configured for RAID 0, 1, 5, 10 and JBOD setups. Mac, Linux and Windows systems are supported; costs start at $600 for a 1TB array, with an additional two-port PCIe card. The 4TB array is not yet listed.