If nothing is recognized, you are in trouble and you might have lost your data to do anything to recover it, you should know a priori what file system was there.
You might use file(1) as file -s /dev/sdc6 this would read some bytes from the block device and guess what is there. It does not contain any bad blocks (maybe the filesystem on the SD card was broken by usind it with a broken SD card reader?), so I just fixed the filesystem with fsck, put the card in the Raspberry Pi and then it booted without problems. I did a backup of the card (with "cat /dev/sdc | gzip > mybackup") and then checked if the device contains bad blocks. What should I do now to troubleshoot this problem?ĮDIT: I want to thank everybody for help! Finally I found - using fsck - that the partition does contain Linux ext filesystem, but the filesystem is broken and this is why I could not mount it. I would like to know why - is filesystem broken, or is there some other reason? And I would like either to mount this filesystem or somehow recover its files. I understand that due to some unknown reason Linux can't mount this filesystem. Pass 5: Checking group summary informationįree blocks count wrong for group #0 (4245, counted=11608).įree blocks count wrong for group #1 (1373, counted=707).įree blocks count wrong for group #2 (1699, counted=1880). Pass 1: Checking inodes, blocks, and sizes Root was not cleanly unmounted, check forced. When I check the filesystem with fsck, I get: # LC_ALL=C fsck.ext3 -n /dev/sdc6Įxt2fs_open2: Bad magic number in super-blockįsck.ext3: Superblock invalid, trying backup blocks. When I check this partition with file command, it says: # file -s /dev/sdc6 In some cases useful info is found in syslog - tryĭmesg doesn't say anything when I try to mount /dev/sdc6. Missing codepage or helper program, or other error Mount: wrong fs type, bad option, bad superblock on /dev/sdc6, When I try to mount it, I get this result: # mount -v /dev/sdc6 test It seems that /dev/sdc6 is the biggest partition, so I want to mount it. Partition table entries are not in disk order. I/O size (minimum/optimal): 512 bytes / 512 bytesĭevice Boot Start End Sectors Size Id Type Sector size (logical/physical): 512 bytes / 512 bytes When I check this device with fdisk, it says: # fdisk /dev/sdc -lĭisk /dev/sdc: 14.6 GiB, 15707668480 bytes, 30679040 sectors Number Start End Size Type File system Flags Sector size (logical/physical): 512B/512B Welcome to GNU Parted! Type 'help' to view a list of commands. The partition table of this card is: # parted /dev/sdc sdc: detected capacity change from 0 to 15707668480 sd 6:0:0:0: Attached SCSI removable disk sd 6:0:0:0: Attached scsi generic sg2 type 0
Partition failed couldn t unmount disk driver#
usbcore: registered new interface driver usb-storage
usb-storage 4-1:1.0: USB Mass Storage device detected usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 4-1: New USB device found, idVendor=214b, idProduct=1101
When I put the SD card in a card reader, my dmesg says: usb 4-1: new full-speed USB device number 2 using ohci-pci
Partition failed couldn t unmount disk Pc#
I want to mount this SD card on a Linux PC to get files from it, but I can't.
I have an SD card which was used in Raspberry Pi.
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