1. A system, comprising: a cache storage device; and a processor and logic integrated with and/or executable by the processor, the logic being configured to: receive a write request comprising data to be written to the cache storage device; determine a size of the write request; select a chunk size from among a plurality of chunk sizes designated for storing data in the cache storage device; and allocate a fine block descriptor (FBD) having the selected chunk size to the write request.