My missing post (from browser history):
3561403 in https://www.eevblog.com/forum/beginners/12v-l-e-d-light-bar/
Was that post in the last day or so?
I see no history of any deleted post, so I presume it was recent and lost in the reversion to backup.
For those unaware of how this work, the forum server runs on dual redundant boxes. The loss of either box hardware will not impact the forum.
The loss of both boxes as happened in the recent data centre fire results in the forum going down, but at least people can't post and add more stuff that might get lost.
Backups are peformed daily and stored in multiple offsite facilities.
If anything technical happens to the forum in terms of database problems, corruption etc, then the forum may actually continue to operate and we only find out at a later point that something is wrong, during which time people continue to post etc. If the issue can't be fixed, or fixed easily then we may have to resort to reinstalling the backup. That means we could lose anywhere from a few hours to 24 hours worth of posts, or more if we don't notice the issue in a timely fashion. In this case it's not possibel to not lose posts, it's just a matter of how many.
We had the unfortunate latter situation this time where I did not notice anything until i saw the "has anyone lost 5% of their posts?" thread, by which time many thousands of posts were likely to have been made, and it took time to anaylse what was happening and lock down the forum.