Block-level tiered storage can operate on almost any type of data. The storage system monitors data at a block level and be able to set policies based on the block itself. Block storage works across all platforms connected to the array, with no additional agents to install on those servers. Traditional archiving is focused on file level data, and while there are a few database archive utilities available, they’re not in widespread use. The use can be expanded beyond just a simple move from Fibre to ATA.”]
Source: https://www.darkreading.com/database-security/block-level-tiered-storage