In Unraid, the cache was originally used to provide write acceleration for the array. However, with the development of Unraid, the cache pool is no longer just a caching function, but also serves as a storage array. With the introduction of ZFS support in the cache pool in version 6.12, I believe it is necessary to make some changes to the naming of the cache. Cache is a very clear and unambiguous term in the fields of computer science, architecture, and software development, and it refers to providing high-performance IO or temporary storage space for storage systems. I think it is more reasonable to use hot data and cold data to distinguish between the cache pool and the array. Hot data is used to store active or high-performance data, while cold data is used to store read-only, infrequently accessed, or low-performance data. Additionally, using high-performance space and low-performance space to differentiate is also reasonable. This is a naming issue.