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Access "Pros and cons of VTLs"

W. Curtis Preston Published: 19 Oct 2012

This article first appeared in "Storage" magazine in the April issue. For more articles of this type, please visit www.storagemagazine.com. What you will learn from this tip: For disk-to-disk backup, virtual tape libraries (VTLs) treat disk as tape and offer many advantages compared to disk-as-disk backup targets. But VTLs aren't perfect, and there some caveats about the technology that you need to know before implementing a VTL.   VTLs, which treat disk as tape, offer two main advantages over disk-as-disk backup targets: ease of management and better performance. A disk-as-disk target requires all of the usual provisioning steps of standard shared storage arrays. In contrast, if you tell a VTL how many virtual tape drives and virtual cartridges it should emulate, the VTL software automatically handles all of the provisioning and allocates the appropriate amount of disk to each virtual cartridge. If the VTL needs to be expanded (not all VTLs are expandable), you simply connect the additional storage, tell the VTL it's there and the VTL will automatically ... Access >>>

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