So, I began to think this was maybe not the case. My server does sit behind Cloudflare, a home router firewall, as well as Nginx Proxy Manager, and has Fail2Ban running. At first, I thought it could be a hack as why would both drives fail together, but the boot drive was all OK and the logs showed nothing. So, I made a cup of coffee while my heart rate was returning to normal and thought about the problem. One USB drive is the primary data and stores the container volume data (the config and working data for the Docker containers that run off the boot drive), and the second USB drive is a daily Rsync of all the data on the primary drive. My home server boots off an SSD drive and has two 4 TB USB drives connected. Invariably, the actual data is still on the drive, as usually it is the partition or boot sectors that are damaged in some way. The first rule of data recovery though is “Don’t Panic” and also don’t write anything or try formatting the drive. I managed to see the lack of partition and filesystem when using GParted (partition manager) to view them. This I discovered after plugging them into my desktop computer, and they did not even show up as drives. What a week! My car is also misfiring on a cylinder, and this morning I discovered both data drives on my home server showed “unallocated partition and filesystem”. Loadshedding trashed my server’s primary and backup data drives: This is how I recovered them using TestDisk
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