I have heard that there are flash drives on the market that report much higher capacity than they really have. You can build a file system on them and it all looks good; "df" and friends show the claimed capacity. But as soon as you put enough data on the drive to exceed the real capacity, your data is corrupted (and quite possibly your partition table too). It sounds like you may have been the victim of one of these scams:
This article is old. Most of the fake drives out there now are 500GB or 1TB.
Google for "fake 500gb usb flash drive" and you will get lots of hits.
--Greg
On Sun, Jul 16, 2017 at 8:53 AM, Patrick Dupre <pdupre@xxxxxxx> wrote:
Hello,
My 500 Go disk has shrunk to 31.5 G!
Failed to read extended partition table (offset=196141056): Invalid argument
Disk /dev/sdc: 31.5 GiB, 33820284928 bytes, 66055244 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
It should be
Disk /dev/sdc: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
How can I fix it?
Thank
============================================================ ===============
Patrick DUPRÉ | | email: pdupre@xxxxxxx
Laboratoire de Physico-Chimie de l'Atmosphère | |
Université du Littoral-Côte d'Opale | |
Tel. (33)-(0)3 28 23 76 12 | | Fax: 03 28 65 82 44
189A, avenue Maurice Schumann | | 59140 Dunkerque, France
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