SDIO出错 error -84 sending status command, retrying end_request: I/O error, dev mmcblk0, sector

忘是亡心i 2022-05-29 11:54 329阅读 0赞

**在调试emmc的时候遇到一个问题，挂载emmc出现如下错误：**

~ \# mount /dev/mmcblk0 /mnt/

end\_request: I/O error, dev mmcblk0, sector 2  
EXT4-fs (mmcblk0): unable to read superblock  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: error -84 sending stop command, original cmd response 0x900, card status 0x900  
mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x100  
mmcblk0: retrying using single block read  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: error -84 sending status command, retrying

mmcblk0: error -84 transferring data, sector 0, nr 2, cmd response 0x900, card status 0x0mmcblk0: retrying using single block read

**虽然有错误，但是挂载应该是成功了。我在挂载前，在mnt目录下建了一个文件，挂载后文件没了，用df -h 查看磁盘的状态，也有报错。**

/mnt/bin \# df -h

Filesystem                Size      Used Available Use% Mounted on  
/dev/root                32.0M     12.8M     19.2M  40% /  
tmpfs                    13.1M      4.0K     13.1M   0% /dev  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
end\_request: I/O error, dev mmcblk0, sector 1798  
end\_request: I/O error, dev mmcblk0, sector 1799  
end\_request: I/O error, dev mmcblk0, sector 1800  
end\_request: I/O error, dev mmcblk0, sector 1801  
end\_request: I/O error, dev mmcblk0, sector 1802  
end\_request: I/O error, dev mmcblk0, sector 1803  
end\_request: I/O error, dev mmcblk0, sector 1804  
end\_request: I/O error, dev mmcblk0, sector 1805  
end\_request: I/O error, dev mmcblk0, sector 1806  
end\_request: I/O error, dev mmcblk0, sector 1807  
end\_request: I/O error, dev mmcblk0, sector 1808  
end\_request: I/O error, dev mmcblk0, sector 1809  
end\_request: I/O error, dev mmcblk0, sector 1810  
end\_request: I/O error, dev mmcblk0, sector 1811  
end\_request: I/O error, dev mmcblk0, sector 1812  
end\_request: I/O error, dev mmcblk0, sector 1813  
end\_request: I/O error, dev mmcblk0, sector 1814  
end\_request: I/O error, dev mmcblk0, sector 1815  
end\_request: I/O error, dev mmcblk0, sector 1816  
end\_request: I/O error, dev mmcblk0, sector 1817  
end\_request: I/O error, dev mmcblk0, sector 1818  
end\_request: I/O error, dev mmcblk0, sector 1819  
end\_request: I/O error, dev mmcblk0, sector 1820  
end\_request: I/O error, dev mmcblk0, sector 1821  
end\_request: I/O error, dev mmcblk0, sector 1822  
end\_request: I/O error, dev mmcblk0, sector 1823  
end\_request: I/O error, dev mmcblk0, sector 1824  
end\_request: I/O error, dev mmcblk0, sector 1825  
end\_request: I/O error, dev mmcblk0, sector 1826  
end\_request: I/O error, dev mmcblk0, sector 1827  
end\_request: I/O error, dev mmcblk0, sector 1828  
end\_request: I/O error, dev mmcblk0, sector 1829  
end\_request: I/O error, dev mmcblk0, sector 1830  
end\_request: I/O error, dev mmcblk0, sector 1831  
end\_request: I/O error, dev mmcblk0, sector 1832  
end\_request: I/O error, dev mmcblk0, sector 1833  
end\_request: I/O error, dev mmcblk0, sector 1834  
end\_request: I/O error, dev mmcblk0, sector 1835  
end\_request: I/O error, dev mmcblk0, sector 1836  
end\_request: I/O error, dev mmcblk0, sector 1837  
end\_request: I/O error, dev mmcblk0, sector 1838  
end\_request: I/O error, dev mmcblk0, sector 1839  
end\_request: I/O error, dev mmcblk0, sector 1840  
end\_request: I/O error, dev mmcblk0, sector 1841  
end\_request: I/O error, dev mmcblk0, sector 1842  
end\_request: I/O error, dev mmcblk0, sector 1843  
end\_request: I/O error, dev mmcblk0, sector 1844  
end\_request: I/O error, dev mmcblk0, sector 1845  
end\_request: I/O error, dev mmcblk0, sector 1846  
end\_request: I/O error, dev mmcblk0, sector 1847  
end\_request: I/O error, dev mmcblk0, sector 1848  
end\_request: I/O error, dev mmcblk0, sector 1849  
end\_request: I/O error, dev mmcblk0, sector 1850  
end\_request: I/O error, dev mmcblk0, sector 1851  
end\_request: I/O error, dev mmcblk0, sector 1852  
end\_request: I/O error, dev mmcblk0, sector 1853  
end\_request: I/O error, dev mmcblk0, sector 1854  
end\_request: I/O error, dev mmcblk0, sector 1855  
end\_request: I/O error, dev mmcblk0, sector 1856  
end\_request: I/O error, dev mmcblk0, sector 1857  
end\_request: I/O error, dev mmcblk0, sector 1858  
end\_request: I/O error, dev mmcblk0, sector 1859  
end\_request: I/O error, dev mmcblk0, sector 1860  
end\_request: I/O error, dev mmcblk0, sector 1861  
end\_request: I/O error, dev mmcblk0, sector 1862  
end\_request: I/O error, dev mmcblk0, sector 1863  
end\_request: I/O error, dev mmcblk0, sector 1864  
end\_request: I/O error, dev mmcblk0, sector 1865  
end\_request: I/O error, dev mmcblk0, sector 1866  
end\_request: I/O error, dev mmcblk0, sector 1867  
end\_request: I/O error, dev mmcblk0, sector 1868  
end\_request: I/O error, dev mmcblk0, sector 1869  
end\_request: I/O error, dev mmcblk0, sector 1870  
end\_request: I/O error, dev mmcblk0, sector 1871  
end\_request: I/O error, dev mmcblk0, sector 1872  
end\_request: I/O error, dev mmcblk0, sector 1873  
end\_request: I/O error, dev mmcblk0, sector 1874  
end\_request: I/O error, dev mmcblk0, sector 1875  
end\_request: I/O error, dev mmcblk0, sector 1876  
end\_request: I/O error, dev mmcblk0, sector 1877  
end\_request: I/O error, dev mmcblk0, sector 1878  
end\_request: I/O error, dev mmcblk0, sector 1879  
end\_request: I/O error, dev mmcblk0, sector 1880  
end\_request: I/O error, dev mmcblk0, sector 1881  
end\_request: I/O error, dev mmcblk0, sector 1882  
end\_request: I/O error, dev mmcblk0, sector 1883  
end\_request: I/O error, dev mmcblk0, sector 1884  
end\_request: I/O error, dev mmcblk0, sector 1885  
end\_request: I/O error, dev mmcblk0, sector 1886  
end\_request: I/O error, dev mmcblk0, sector 1887  
end\_request: I/O error, dev mmcblk0, sector 1888  
end\_request: I/O error, dev mmcblk0, sector 1889  
end\_request: I/O error, dev mmcblk0, sector 1890  
end\_request: I/O error, dev mmcblk0, sector 1891  
end\_request: I/O error, dev mmcblk0, sector 1892  
end\_request: I/O error, dev mmcblk0, sector 1893  
end\_request: I/O error, dev mmcblk0, sector 1894  
end\_request: I/O error, dev mmcblk0, sector 1895  
end\_request: I/O error, dev mmcblk0, sector 1896  
end\_request: I/O error, dev mmcblk0, sector 1897  
end\_request: I/O error, dev mmcblk0, sector 1898  
end\_request: I/O error, dev mmcblk0, sector 1899  
end\_request: I/O error, dev mmcblk0, sector 1900  
end\_request: I/O error, dev mmcblk0, sector 1901  
end\_request: I/O error, dev mmcblk0, sector 1902

end\_request: I/O error, dev mmcblk0, sector 2051  
end\_request: I/O error, dev mmcblk0, sector 2052  
end\_request: I/O error, dev mmcblk0, sector 2053  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: response CRC error sending r/w cmd command, card status 0x900  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: error -84 sending status command, retrying  
mmcblk0: error -84 sending status command, aborting  
end\_request: I/O error, dev mmcblk0, sector 1995  
FAT-fs (mmcblk0): FAT read failed (blocknr 1995)  
df: /mnt: Input/output error

**发现能够正常的读写，好像一切都是没问题。**

**最后找到了原因，板子的SDIO做了兼容，既能够使用emmc，又能够使用TF卡，虽然连到TF卡上的电阻拿掉了，相当于断路，但是sdio的clk频率很大，有100M，多连接的导线相当于一个天线，会产生干扰。**