Magazine article Information Today

Mass Storage with CD-ROM Libraries from Acorn Software

Magazine article Information Today

Mass Storage with CD-ROM Libraries from Acorn Software

Article excerpt

If you need to store and retrieve large amounts of data quickly and easily at the lowest cost per media, try VirtualBranches. Acorn software, combined with the family of CD-ROM changers and jukeboxes from Pioneer, brings to the DEC OpenVMS environment a powerful and cost-effective storage solution with huge capacity and high data transfer rates. Users can view their CD-ROM library as multiple virtual disk volumes, all simultaneously mounted online. The storage capability of the system is restricted only by the number of storage devices the users want to install.

"VirtualBranches brings plug-and-play convenience to the DEC world," according to Lorraine Doyle, Acorn Software president. "Large capacity data storage for OpenVMS is now as easy as selecting a CD on your sound system."

Here's how it works. Since the surface of each CD-ROM appears as a virtual volume, it allows all stored disc volumes to be mounted and accessed simultaneously as cluster-wide mounted disc volumes. This makes stored data available to all existing utilities and applications. When an application queries CD-ROM libraries and requests information, the discs perform exactly like locally connected magnetic disks.

When a disc requested by an application is not physically in a drive, VirtualBranches queues the request and assigns a priority for swapping within the drives in the library. VirtualBranches finds the disc volume and places the CD-ROM in the first available drive. The drive spins up and the CD-ROM is ready for use. …

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