SD Card, no read, bad superblock, no response

hkjz · 09-23-2021, 03:28 PM

Hello there,

I have an SD card that is mainly used in the phone. Unfortunately it has problems with it, I could not copy anything to it. Nevertheless, I was able to paste items from the card into the phone and start exploring it.

I can't access it from GParted. Below is the result of some commands used.

Code:

$ lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
mmcblk0     179:0    0  28.9G  0 disk  
└─mmcblk0p1 179:1    0  28.9G  0 part  

$ sudo fdisk -l
Device         Boot Start      End  Sectors  Size Id Type
/dev/mmcblk0p1       8192 60506111 60497920 28.9G  c W95 FAT32 (LBA)

$ sudo mount /dev/mmcblk0 /mnt/SD-Ruf
mount: /mnt/SD-Ruf: wrong fs type, bad option, bad superblock on /dev/mmcblk0, missing codepage or helper program, or other error.

$ sudo fsck /dev/mmcblk0
fsck from util-linux 2.33.1
e2fsck 1.44.5 (15-Dec-2018)
/dev/mmcblk0 is in use.
e2fsck: Cannot continue, aborting.

$ sudo mkfs.ext4 /dev/mmcblk0
mke2fs 1.44.5 (15-Dec-2018)
Found a dos partition table in /dev/mmcblk0
Proceed anyway? (y,N) y
/dev/mmcblk0 is apparently in use by the system; will not make a filesystem here!

$ sudo dmraid -r
no block devices found

$ sudo mdadm --stop /dev/mmcblk0
mdadm: /dev/mmcblk0 does not appear to be an md device


$ sudo mount /dev/mmcblk0 /mnt/SD-Ruf
mount: /mnt/SD-Ruf: /dev/mmcblk0 already mounted or mount point busy.

michaelk · 09-23-2021, 04:34 PM

The filesystem and data is on partition 1

Code:

sudo mount /dev/mmcblk0p1 /mnt/SD-Ruf

hkjz · 09-24-2021, 12:48 AM

What you said is quite enigmatic, what you would like to tell me? Thanks

hkjz · 09-24-2021, 12:52 AM

What you said is quite enigmatic, what you would like to tell me? Some linking chain is missing and I dont fully undestand the message. Thanks

michaelk · 09-24-2021, 02:58 AM

/dev/mmcblk0 is the entire device. The beginning contains the MBR which is the partition table.

The device contains 1 partition /dev/mmcblk0p1. This is where the filesystem is located and all the data. To access the data you need to mount partition 1.

All the commands you posted with errors were using the wrong device ID.

business_kid · 10-02-2021, 05:52 AM

Have you even got the FAT module compiled? Many folks don't use it.

Anhd to address the disk, use /dev/mmcblk0p1.

jefro · 10-03-2021, 02:39 PM

"/dev/mmcblk0 is in use"

use command mount to see what is mounted