diff --git a/cores/common/arduino/libraries/inline/Flash/Flash.h b/cores/common/arduino/libraries/inline/Flash/Flash.h
index e9c46ef..7a4290e 100644
--- a/cores/common/arduino/libraries/inline/Flash/Flash.h
+++ b/cores/common/arduino/libraries/inline/Flash/Flash.h
@@ -23,13 +23,13 @@ class FlashClass {
 	/** @copydoc lt_flash_read() */
 	inline bool readBlock(uint32_t offset, uint8_t *data, size_t length) {
 		//
-		return lt_flash_read(offset, data, length);
+		return lt_flash_read(offset, data, length) == length;
 	}
 
 	/** @copydoc lt_flash_write() */
 	inline bool writeBlock(uint32_t offset, uint8_t *data, size_t length) {
 		//
-		return lt_flash_write(offset, data, length);
+		return lt_flash_write(offset, data, length) == length;
 	}
 };
 
diff --git a/cores/common/base/api/lt_flash.h b/cores/common/base/api/lt_flash.h
index 6117f24..0551907 100644
--- a/cores/common/base/api/lt_flash.h
+++ b/cores/common/base/api/lt_flash.h
@@ -40,9 +40,9 @@ bool lt_flash_erase_block(uint32_t offset);
  * @param offset starting offset (in bytes)
  * @param data pointer to where to store the data
  * @param length length of data to read
- * @return whether reading was successful (i.e. all bytes were successfully read)
+ * @return length of data successfully read (should equal 'length')
  */
-bool lt_flash_read(uint32_t offset, uint8_t *data, size_t length);
+uint32_t lt_flash_read(uint32_t offset, uint8_t *data, size_t length);
 
 /**
  * @brief Write data to the flash.
@@ -50,6 +50,6 @@ bool lt_flash_read(uint32_t offset, uint8_t *data, size_t length);
  * @param offset starting offset (in bytes)
  * @param data pointer to data to write
  * @param length length of data to write
- * @return whether writing was successful (i.e. all bytes were successfully written)
+ * @return length of data successfully written (should equal 'length')
  */
-bool lt_flash_write(uint32_t offset, uint8_t *data, size_t length);
+uint32_t lt_flash_write(uint32_t offset, uint8_t *data, size_t length);
diff --git a/cores/common/base/lt_api.c b/cores/common/base/lt_api.c
index 10a139d..0ea6995 100644
--- a/cores/common/base/lt_api.c
+++ b/cores/common/base/lt_api.c
@@ -148,12 +148,12 @@ bool lt_flash_erase_block(uint32_t offset) {
 	return fal_partition_erase(fal_root_part, offset, 1) >= 0;
 }
 
-bool lt_flash_read(uint32_t offset, uint8_t *data, size_t length) {
-	return fal_partition_write(fal_root_part, offset, data, length) == length;
+uint32_t lt_flash_read(uint32_t offset, uint8_t *data, size_t length) {
+	return fal_partition_read(fal_root_part, offset, data, length);
 }
 
-bool lt_flash_write(uint32_t offset, uint8_t *data, size_t length) {
-	return fal_partition_read(fal_root_part, offset, data, length) == length;
+uint32_t lt_flash_write(uint32_t offset, uint8_t *data, size_t length) {
+	return fal_partition_write(fal_root_part, offset, data, length);
 }
 
 /*__  __