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Hardware Environment  



Volume Shadowing for OpenVMS does not depend on specific hardware in order to operate. All shadowing functions, with the exception of minicopy, can be performed on Alpha and VAX computers using the OpenVMS operating system. The minicopy operation can be performed only on an OpenVMS Alpha system. However, an OpenVMS VAX system can be a member of an OpenVMS Cluster system that uses this feature.

Volume shadowing requires a minimum of:

The following sections generically describe hardware support. See the HP Volume Shadowing for OpenVMS Software Product Description (SPD 27.29.xx) for more information.

Memory Requirements  

Starting with OpenVMS Version 7.3, the following additional memory is required to run Volume Shadowing for OpenVMS:

These memory requirements are cumulative. For example, a system with 10 shadow sets mounted, with each shadow set consisting of 50-GB member disks, would require an additional 1,119 KB of memory. The calculation follows:

Supported Devices   

The requirements for the physical disks that form a shadow set follow:


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