10/28/2022 0 Comments Testdisk analyse cylinder read errorMar 11 23:40:34 ProBook kernel: mmcblk0: p1Īnother check with parted(8) shows a recognized partition layout. Mar 11 23:40:34 ProBook kernel: mmc0: new SDHC card at address aaaa After a few attempts, the SD card was connected and the the log showed a few lines indicating the card was detected properly. In an unscientific attempt, the SD card was disconnected and reconnected again a few times while watching the log file. Long story short, an attempt to read anything from the SD card failed with only I/O errors. Mar 10 19:32:28 ProBook kernel: mmcblk0: retrying using single block read Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323008, nr 8, cmd response 0x900, card status 0xb00 Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323015, nr 1, cmd response 0x900, card status 0x0 Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323014, nr 2, cmd response 0x900, card status 0x0 Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323013, nr 3, cmd response 0x900, card status 0x0 Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323012, nr 4, cmd response 0x900, card status 0x0 Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323011, nr 5, cmd response 0x900, card status 0x0 Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323010, nr 6, cmd response 0x900, card status 0x0 Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323009, nr 7, cmd response 0x900, card status 0x0 Mar 10 19:32:28 ProBook kernel: mmcblk0: error -84 transferring data, sector 323008, nr 8, cmd response 0x900, card status 0x0 Sector size (logical/physical): 512B/512BĪ quick peak into the system’s log files (/var/log/syslog on debian based distributions) revealed a lot of I/O errors like those shown below. $ parted -lĮrror: /dev/mmcblk0: unrecognised disk label When the SD card was first connected, the device showed up but the system could not read the partition layout. This will avoid any accidental write operations which could destroy data. Before connecting the SD card to the system, flip the switch on the SD card to write protect it.
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