HP has extended its pay-per-use program to SMEs purchasing StorageWorks Enterprise Virtual Arrays (EVA), reducing total cost of ownership and simplifying budgets.

From today, modular systems, including the EVA3000 and EVA5000, will be charged according to the capacity that each customer uses. The system can be scaled up, as and when the need arises, to 24TB and 35TB respectively.

HP says its program will avoid spikes in capital spend, provide a more predictable storage expense outflow and lower total cost of ownership, as well as allow for a more predictable revenue stream.

A system's initial capacity can be raised incrementally to the available limit, with extra capacity generally added through the array's virtualisation software.

HP is promoting the utility pricing model as part of its Adaptive Enterprise computing strategy. Such a utility pricing model was previously available only for enterprise customers using HP's Disk Array XP Series devices.

The company has also introduced its StorageWorks ESL E-Series tape libraries supporting either LTO ULtrium 460 or SDLT 320 formats. SDLT 600 is not supported. Native Fibre Channel connectivity will be added later this year. A pay-per-use pricing model is not available for these libraries, which will ship from March onwards.