500 GB HD has only 8 MB and file system not recognized

[tomsiduction]

Hello

My 500 GB HD has only 8 MB and file system not recognized:

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fdisk -l /dev/sdb
Disk /dev/sdb: 8 MiB, 8388608 bytes, 16384 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x1075dc71

Device     Boot Start   End Sectors Size Id Type
/dev/sdb1        2048 16383   14336   7M 83 Linux


Gparted :

Das Dateisystem wurde nicht erkannt! Mögliche Gründe sind:
- Das Dateisystem ist beschädigt
- Das Dateisystem ist GParted nicht bekannt
- Es ist kein Dateisystem vorhanden (nicht formatiert)
- Der Geräteeintrag /dev/sdb1 fehlt


Any idea what to do?

It happend when I tried to change from MS-Dos to GPT

Regards

[ReinerS]

If nothing else helps I would suggest to overwrite the whole disk (dev/sdb)or 10 GB of it with dd and try again. It should overwrite all Partion informations.

regards
Reiner

[tomsiduction]

Hello
That is what I did.
It ended after 8 MB

Curious

[ReinerS]

Well, I am afraid we have to assume then that the disk is dead.
You still could  try in another box but I doubt it will do better there.

regards
Reiner

[sunrat]

That is what I did.
It ended after 8 MB

Explaining exactly what you did would be helpful. The disk does not appear to have had a gpt partition table created.

[tomsiduction]

Hello and thank you for the hint.

I was able to recover the disk via "testdisk".
There I had the chance to set the "proposed" heads, cylinders, ... again in a correct way.

Regards

[dibl]

I was able to recover the disk via "testdisk"

I don't think that worked.

From a live CD:

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su

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gparted

Device > Create Partition Table

Choose the table type that you want (MS-DOS or GPT), then use the green "Apply" arrow to set it. Then you can make the partitions that you want.