I recenlty posted a review of DriveDx from Binary Fruit, and it helped me diagnose not one, but two external drive failures in time to rescue data. Unfortunately, Apple doesn’t have a tool that provides easy and direct access or evaluation. Often, there are signs ahead of time that something’s going wrong, and modern drives record diagnostic problems to an internal log. Cases for 2.5-inch (mobile) and 3.5-inch (desktop) drives can be very inexpensive-as little as $10 to $20. If you think the drive is fine and the case is a problem, you may be able to swap the drive into another case to test. A drive has its own operating system, circuit boards, and chips, but a case also has components, firmware, and a power supply (unless it’s powered via the USB or Thunderbolt 3 bus). This is another hard thing to diagnose separate from the drive.
Mac internal hard drive unmounted free#
The company may be able to send you free or for a small fee a replacement adapter if it thinks that’s the problem. You may need to call the company or use online tech support to get additional troubleshooting. Even with a power light, it can be tough to monitor and hard to test if a power adapter is the culprit, because AC power adapters are rarely the same among different companies (or even models of drive from the same company). If the drive has a power light separate from an activity LED, observe it and see if it’s flickering or otherwise inconstant. Check that the adapter is plugged in to the drive firmly and that the AC power plug isn’t jiggling in the outlet or surge protector. Swap another identical cable, as it’s the cheapest way to isolate the problem.Ī faulty power connection. Cable failure is more likely for drives that are routinely connected and disconnected to a computer. This is true even if it’s the one included with the drive or you purchased one from a company with strong positive product reviews. Even if you haven’t touched the cable since you attached an external drive years ago to a desktop computer, cables can fail. Here are five other possibilities and some accompanying ideas for troubleshooting:Ī bad cable.
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