A week of downtime and all the servers were recovered only because the customer had a proper disaster recovery protocol and held backups somewhere else, otherwise Google deleted the backups too
Google cloud ceo says “it won’t happen anymore”, it’s insane that there’s the possibility of “instant delete everything”
Same way companies know they’ve been hacked. I’m making the assumption you’re non technical, given the question. But there are many ways such as access logs, server monitoring etc
Which are all in the control of the company running the servers. If we trust the company, we can trust them giving honest information on these, but if we don’t trust the company… they could just redact logs or even straight out fake them