Mass storage requirements have expanded dramatically over the last few years. High-end HP-UX customers now require Terabytes of storage and thousands of storage devices (LUNs) accessible from a single HP-UX server. This paper will address HP-UX limits on the maximum number of LUNs accessible in various ways from an HP-UX server, and significant LUN limits that exist at a subcomponent level such as per-HBA (Host Bus Adapter) limits. The nature of these limits will be defined, and issues, recommendations, or restrictions that apply when operating at or near these limits will be discussed, along with expectations for the future and what to do if you need to exceed existing supported levels.
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