Western Digital Caviar Black 640GB hard disk drive (part No. WD6401AALS-00L3B2) delivers 7200 RPM performance in a standard 3.5-inch form factor. The drive features SATA II (3 Gb/s) connectivity with 32MB cache buffer, suitable for desktop workstations and external storage enclosures requiring sustained sequential throughput. Compatible with standard SATA host adapters and external USB/eSATA bridge controllers. Typical applications include archival backup, media library storage, and secondary data repositories where capacity and cost-per-GB matter more than enterprise-grade speed or redundancy. This refurbished unit has been tested and guaranteed by G5 Network Group; available via quote.
