external HDD with corrupted partition table

[Luca Ferrari]

On Mon, Aug 24, 2015 at 12:24 PM, Luca Ferrari <fluca1978 at infinito.it> wrote:
> On Mon, Aug 24, 2015 at 12:17 PM, Luca Ferrari <fluca1978 at infinito.it> wrote:
>> Hi all,
>> I'm running kernel 3.16, on Kubuntu 14.10. I've a 2TB external hdd,
>> and after havin replaced the external case with another identical
>> (Hamlet HXD3CCUU) my hard disk is no more showing up in the device
>> list.
>
> I have to add that gdisk shows an MBR-GPT explicit conversion, so
> maybe is something the ecnlosure cannot handle?
>
> % sudo gdisk -l /dev/sdc
> GPT fdisk (gdisk) version 0.8.8
>
> Partition table scan:
>   MBR: MBR only
>   BSD: not present
>   APM: not present
>   GPT: not present

I can confirm that, so far, rebuilding the partition table from the
begin to the end of the disk worked and no data seems to be lost. I've
used testdisk http://www.cgsecurity.org/wiki/TestDisk to automate the
process as much as possible.
However, I'm still curious how and why changing the enclosure causes a
partition data misunderstanding. Please note I've already experienced
something similar:
https://forums.freebsd.org/threads/wd-usb-device-issues-not-freebsd.32223/

Luca