10/23/2022 0 Comments Testdisk analyse cylinder$ info ddrescueĪs described in Mount raw image of entire disc the device can be added using the losetup(8) command. To get more into details about those phases, check the ddrescue online documentation or run the following command. While ddrescue is trying to create a disc image, it will attempt to read the data in multiple phases. Opos: 2062 MB, run time: 1.42 h, successful read: 7.88 m agoĬreating a disk image can be quite a time intensive task. Ipos: 2062 MB, errors: 3, average rate: 6204 kB/s Rescued: 31914 MB, errsize: 81920 B, current rate: 0 B/s $ sudo ddrescue -f /dev/mmcblk0 SD_card_rescue.img SD_card_rescue.log The last file name is the log file to be created by ddrescue. The -f option instructs ddrescue to overwrite the output file. The following will use ddrescue to create a raw disk image “SD_card_rescue.img” from the SD card represented by the device “/dev/mmcblk0”. To create a disc image, dd(1) can be used, or – more suitable for disks / SD cards with potential damage – is ddrescue(1). To work on the corrupt data, best practice is to create a bit-by-bit copy of the affected disk or partition. With the I/O errors gone for now, the next step is important as the SD card could fail again any time. Number Start End Size Type File system Flags Warning: Unable to open /dev/mmcblk0 read-write (Read-only file system). Mar 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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |