[17:22] Could somebody help me troubleshoot my Raspberry Pi 4 Ubuntu 22.04 LTS server randomly crashing every few days? I have 6 externally powered HDDs hooked up to externally powered hubs (no backfeed), and everything works great, until the server suddenly stops responding and needs a power reset. The logs show a bunch of "^@^@^@^@^@^@^@^@^@^@^" symbols [17:22] and then cut off. FWIW, most of the times, right before these symbols, I can see logs from my scheduled smartctl scan reporting checksum error.