Use Automatic Startup Repair Verify the boot order Verify the hardware connection Use System Restore Repair the computer using Installation Media To learn more about these tips and tricks, continue ...
When you boot your HP computer and it fails to boot and throws the SMART Hard Disk Error 301, 302, 309, 30A, 30B, 30C, 3F1, or 3F2, then the fixes we have presented ...
Disk Utility is Apple's go-to macOS app for finding and repairing common disk errors, but if it's your Mac's internal disk that's the problem, then your Mac might not even start up into macOS.
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