Re: Unable to mount USB connected hard drive.

[Samuel Sieb]

On 3/14/21 2:44 PM, Erik P. Olsen wrote:
> I've had this 1 TB drive for about 1 year and have been using it succesfully for backups
> of my anf my wife's systems and suddenly yesterday morning I was unable to mount it.
> Neither fdisk nor gparted can see it but lsusb can:
>
> Bus 002 Device 003: ID 0bc2:ab26 Seagate RSS LLC Backup Plus Slim Portable Drive 1 TB
>
> On trying to mount I get this error message:
>
> mount: /backupdev: cannot read the superblock on /dev/sdc1
>
> Is the drive a brick or can I perhaps regenerate the superblock somehow?

That's a very bad sign.  Check the journal to see if it's an I/O error 
or corruption.  Which filesystem is it?  What does "file -s /dev/sdc1" show?