Storagenode had corrupted data in over 400 blocks on the hard-drive storage

This should probably be a different topic. (Edit: Thanks @Alexey!)
I don’t think uptime is what you should be worried about. First would be to find out why the data got corrupted in the first place. It may just be a dying hdd. Even if you’ve managed to rescue the remaining data, your node will likely keep failing audits until it’s disqualified.
What to do next really depends on the damage. You can try to keep it alive long enough to eventually attempt a graceful exit or start over now. Keep a close eye on your audit scores (not the percentages on the dashboard). You can use the Storage node dashboard API or the Earnings calculator (Update 2019-12-20: v8.1.0 - Now with Uptime and Audit scores, Vetting progress and DQ indication!) . The latter was updated to display this info as well.

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