I have an HP Z840 that hasn't been connected to the internet for about six months. It booted up fine and I was able to log in to the domain. After running some Adobe updates while installing NVIDIA GPU firmware, I rebooted, and it suddenly started updating Windows. The next morning, I found it stuck at a command line saying the drive couldn't be found and that I should attach the cable. I checked the hard drives in the BIOS, but neither of them shows up or passes the test. The boot drive works fine on a Mac, though. The drives connect to the motherboard with a lock and click system. I've reset the BIOS to factory settings and even tried moving the drives to different slots, but they still don't show up in the BIOS.
3 Answers
Definitely try doing a proper CMOS reset instead of just resetting to factory defaults; that often helps. If that doesn’t work, consider re-flashing the BIOS to the latest version. It can reset settings that a standard CMOS reset won’t cover. Also, check if secure boot settings are affecting the visibility of your drives in BIOS.
It sounds like you might have accidentally lost your drives due to some changes during the update. Always make sure you back up your data before doing updates! Do you happen to know if your drives are getting power? Sometimes a full power down helps—turn off the power supply, press the case power button to drain any residual power, and then try rebooting. Also, be sure to reset the BIOS by either shorting out the CMOS reset pins on your motherboard or pulling out the CMOS battery.
Just to confirm, have you checked if the power to the drives is stable? Sometimes it's as simple as a loose cable or a power issue. If your drives are showing up fine on another machine (like your Mac), it might be worth checking them one more time in the BIOS after a complete power cycle. If it’s not showing there, it could be a deeper issue with the motherboard.
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