You configure block disk (Fibre Channel), Edge local, and iSCSI LUNs in the LUNs page. Typically, block disk and iSCSI LUNs are used to store production data. They share the space in the blockstore cache of the associated Edges, and the data is continuously replicated and kept synchronized with the associated LUN in the data center. The Edge blockstore caches only the working set of data blocks for these LUNs; additional data is retrieved from the data center when needed.

Block-disk LUN configuration pertains to Fibre Channel support. Fibre Channel is supported only in Core deployments.

Edge local LUNs are used to store transient and temporary data or local copies of software distribution repositories. Local LUNs also use dedicated space in the blockstore cache of the associated Edges, but the data is not replicated back to the data center LUNs.