Non-volatile storage class memory data flow with mismatched block sizes

Abstract

In an approach to NV SCM data flow with mismatched block sizes, responsive to receiving a command from a host on a memory controller for a storage class memory, whether the command is a write command is determined. Responsive to determining that the command is the write command, the command is inserted into a first buffer. Responsive to the command exiting the first buffer, whether the command generates a cache hit from the internal cache is determined. Responsive to determining that the command generates the cache hit, the write data is written into the internal cache. Responsive to determining that the command does not generate the cache hit, whether an oldest page in the internal cache is dirty is determined. Responsive to determining that the oldest page in the internal cache is dirty, a modified oldest page is written to the internal cache and a second buffer.