[CentOS] Accidentally nuked my system - any suggestions ?

Tue Dec 4 22:10:12 UTC 2018
Gordon Messmer <gordon.messmer at gmail.com>

On 12/4/18 2:01 PM, Nicolas Kovacs wrote:
> I tried a hard reset, but of course, the boot process would stop short
> very early in the process.

The system should boot normally if you disconnect sdb.  Have you tried that?