1. A system for detecting errors in a memory device, the system comprising: a memory sub-system comprising: a plurality of memory cartridges configured to store data words; and a device configured to initiate an internal READ command to the plurality of memory cartridges in response to an event; and a host controller operably coupled to the memory sub-system and comprising error detection logic configured to detect errors in a data word which has been read from the plurality of memory cartridges.