HIGHLIGHTS o 7200 RPM 2.1-GB, 3.5-inch SCSI disk for the HSX controller family o Offered in both narrow and wide variants o StorageWorks enclosures available from deskside to datacenter PRODUCT DESCRIPTION The RZ28D 2.1-GB, 3.5-inch SCSI disk drive is the latest entry into the 7200 RPM high-performance family. It takes its place with the 4.3 GB RZ29B. Available in both 8-bit narrow (RZ28D-VA) and 16-bit wide (RZ28D-VW) variants, the RZ28D is particularly well-suited for high-bandwidth applications where performance and data integrity are of paramount importance. BENEFITS o A 40 percent faster transfer rate than 5400 RPM offerings o 25 percent reduced rotational latency and track-to-track seek times o Significantly reduced command overhead time because of faster spindle speed and more efficient firmaware o Easy to install, configure, maintain, and hot swap o Backed by a 5-year warranty; first year onsite o Protected investment and configuration flexibility with StorageWorks enclosures AVAILABILITY AND ORDERING The RZ28D disk drives are available from Digital and its authorized distributors. Order No. Description RZ28D-VA 2.1 GB 7200 RPM StorageWorks Building Block, 8-bit RZ28D-VW 2.1 GB 7200 RPM StorageWorks Building Block, 16-bit TECHNICAL DATA The RZ28D-VA is not supported in the BA353 cabinet at present. For additional technical information, please see the "High Performance StorageWorks Disk Drives" article in the November 1995 issue of Customer Update. The RZ28D 2 GB 7200 RPM can be combined with the RZ28M 2 GB 5400 RPM disk in stripe/shadow sets. The following table compares selected specifications for the two disk drive types: Specification Highlights RZ28D RZ28M Capacity (MBF) 2,104 2,104 RPM 7200 5400 Media transfer rate (MB per 3.56 to 7.65 2.7 to 5.5 second) Average rotational latency 4.17 5.54 (milliseconds) Average seek time - Read 8.0 9.0 (milliseconds) Average access time - Read 9.0 10.4 (milliseconds) Track-to-track seek time 1.6 2.1 (milliseconds) MTBF 800,000 800,000 All 7200 RPM drives require additional cooling. Users should order the cabinet with the cooling already installed (part numbers SW800-FA/FB, SW500-FA/FD, SW300-AA), or, if installing 7200 RPM drives in an existing cabinet, order and fit the additional fan tray (part numbers SW8XF-AA/AB and SW5XF-AC/AD). No changes are required to the SW300 cabinet, which already has the additional cooling provided. Minimum operating system support o OpenVMS VAX V5.5-2 o OpenVMS Alpha V6.1 o OSF V3.2 o Windows NT V3.5 The RZ28D models are for use on Digital hardware platforms only.