ATTR_BAD_DQ_BITMAP TARGET_TYPE_DIMM Bad DQ bitmap from a controller point of view. The data is a 10 byte bitmap for each of 4 possible ranks. The bad DQ data is stored in NVRAM, and it is stored in a special format translated to a DIMM Connector point of view. All of these details are hidden from the user of this attribute. uint8 bad_dq_bitmap 4 10