diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 8e37be1..d6d97d8 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1066,6 +1066,21 @@
 		if (dmi_find_device(DMI_DEV_TYPE_OEM_STRING, oemstrs[i], NULL))
 			return 1;
 
+	/* TECRA M4 sometimes forgets its identify and reports bogus
+	 * DMI information.  As the bogus information is a bit
+	 * generic, match as many entries as possible.  This manual
+	 * matching is necessary because dmi_system_id.matches is
+	 * limited to four entries.
+	 */
+	if (!strcmp(dmi_get_system_info(DMI_SYS_VENDOR), "TOSHIBA") &&
+	    !strcmp(dmi_get_system_info(DMI_PRODUCT_NAME), "000000") &&
+	    !strcmp(dmi_get_system_info(DMI_PRODUCT_VERSION), "000000") &&
+	    !strcmp(dmi_get_system_info(DMI_PRODUCT_SERIAL), "000000") &&
+	    !strcmp(dmi_get_system_info(DMI_BOARD_VENDOR), "TOSHIBA") &&
+	    !strcmp(dmi_get_system_info(DMI_BOARD_NAME), "Portable PC") &&
+	    !strcmp(dmi_get_system_info(DMI_BOARD_VERSION), "Version A0"))
+		return 1;
+
 	return 0;
 }