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+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_READ_UNCORRECTED_BLOCKS:
+
+**************************
+FE_READ_UNCORRECTED_BLOCKS
+**************************
+
+Name
+====
+
+FE_READ_UNCORRECTED_BLOCKS
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+========
+
+.. c:macro:: FE_READ_UNCORRECTED_BLOCKS
+
+``int ioctl(int fd, FE_READ_UNCORRECTED_BLOCKS, uint32_t *ublocks)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``ublocks``
+    The total number of uncorrected blocks seen by the driver so far.
+
+Description
+===========
+
+This ioctl call returns the number of uncorrected blocks detected by the
+device driver during its lifetime. For meaningful measurements, the
+increment in block count during a specific time interval should be
+calculated. For this command, read-only access to the device is
+sufficient.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.