How to fix Broken label sd card mmcblk0?

Question

I can't mount my 16gb sd card after my computer shut down will i was copping some file into the card , i tried to fix it using fdisk i think somehow i managed to delete the header of disk also

i traid adding table partition with gparted but it won't work

Device -> New Partition Table.

I also try to recover the partition with testdisk but it didn't fin anything with normal or deep scan

root@localhost:~# mkdosfs -F 32 -v /dev/mmcblk0
mkfs.fat 3.0.28 (2015-05-16)
/dev/mmcblk0 has 4 heads and 16 sectors per track,
hidden sectors 0x0000;
logical sector size is 512,
using 0xf8 media descriptor, with 31211520 sectors;
drive number 0x80;
filesystem has 2 32-bit FATs and 16 sectors per cluster.
FAT size is 15226 sectors, and provides 1948814 clusters.
There are 32 reserved sectors.
Volume ID is 4d768915, no volume label.

I'm not concerned about the data in it, i just want know how can i fix it.

Answer 1

You can use the wipe menu of mkusb to create a new partition table and file system. The standard is an MSDOS partition table and one partition with the FAT32 file system. See the following links,

help.ubuntu.com/community/mkusb

mkusb/wipe

Edit:

According to your output from

mkdosfs -F 32 -v /dev/mmcblk0

the device is recognized as a mass storage device. Such a device works best, when there is at least one partition. But you tried to create a file system directly on the device (without a partition structure) like it used to be on floppy disks, and like is is in CD/DVD disks.

You can create a partition table with manual tools, for example gparted, but it is 'automatic' with mkusb. When gparted does not work, I suspect that there are some data, that confuses gparted, and mkusb overwrites those data with zeros (overwrites the first megabyte).