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I think you're misunderstanding what the "backup" was in this context (in particular as the article is unhelpful by calling it a backup file, which isn't accura

I think you're misunderstanding what the "backup" was in this context (in particular as the article is unhelpful by calling it a backup file, which isn't accurate). In this case it is two PRODUCTION systems running concurrently. The primary and the secondary (article calls the "backup"). Primary went down due to corruption, but the identical secondary system couldn't be switched to because the corruption also occurred there.

VWWHFSfQ 4y ago
So the backup system failed
- bryan_w 4y ago
  No, it's the RAID vs Backup distinction. If you have 2 disks in Raid 1, you have a system that can survive one drive dying (high availability), but you also need a backup system (offline). It sounds like their high availability system failed but they probably were able to restore from backup (offline)
phaedrus 4y ago
Perhaps they should have called it a "tandem" system or hot-standby.