is that mean all data storage on my local device is already lost?
If you are asking if the blocks you downloaded are lost, they aren't. Bitcoin Core doesn't delete in-good-shape blocks during a reindex, or after a sudden shutdown for that matter.
But if you mean if the data on your disk is lost, the answer is also no unless the disk is the one that failed. Other parts failing doesn't wipe the disk or make it unreadable. If you still aren't confident then get some software that runs SMART tests on your disks and check the results if they are OK. I don't know which operating system you're using so I can't make specific recommendations though.