SanDisk ReadyCache drive doesn’t support Deterministic Read Zero after Trim (DZAT), it only supports Deterministic Trim (DRAT). When DRAT is set, all read commands to the LBA after a Trim shall return the same data, or become determinate. SanDisk ReadyCache drive returns the same data.
Trimcheck tool expects to return zero after TRIM, which is applicable to DZAT, so this test result is not applicable for the ReadyCache SSD.