Apple Hard Drive Tower

adminфевраля 08 2021

Apple Hard Drive Tower

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Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely.

Before proceeding, make sure that you have a current backup of your Mac, in case you need to recover damaged files or Disk Utility finds errors that it can't repair.

Open Disk Utility

Start up from macOS Recovery, then select Disk Utility from the Utilities window. Click Continue.
If you're not repairing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.

Locate your disk in Disk Utility

Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility.

The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. And beneath each disk you should see any containers and volumes on that disk. Don't see your disk?

In this example, the startup disk (APPLE HDD) has one container and two volumes (Macintosh HD, Macintosh HD - Data). Your disk might not have a container, and it might have a different number of volumes.

Repair volumes, then containers, then disks

For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab.

In this example, the last volume on the disk is Macintosh HD - Data.

Click Run to begin checking the selected volume for errors.

If there is no Run button, click the Repair Disk button instead.
If the button is dimmed and you can't click it, skip this step for the item you selected, and continue to the next item.
If you're asked for a password to unlock the disk, enter your administrator password.

After Disk Utility is done checking the volume, select the next item above it in the sidebar, then run First Aid again. Keep moving up the list, running First Aid for each volume on the disk, then each container on the disk, then finally the disk itself.

In this example, the repair order is Macintosh HD - Data, then Macintosh HD, then Container disk2, then APPLE HDD.

If Disk Utility found errors that it can't repair

If Disk Utility found errors that it could not repair, use Disk Utility to erase (format) your disk.

If your disk doesn't appear in Disk Utility

If Disk Utility can't see your disk, it also can't see any containers or volumes on that disk. In that case, follow these steps:

Shut down your Mac, then unplug all nonessential devices from your Mac.
If you're repairing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
If your disk still doesn't appear in Disk Utility, your disk or Mac might need service. If you need help, please contact Apple Support.

Macs aren’t immune from hard disk corruption and failures. They’re just as common on Macs as they are PCs. Although most Macs have solid-state drives, even these systems can have problems. Apple’s built-in utilities and some third-party programs will get you up and running.

Symptoms of a Hard Disk Problem

The worst noise you’ll hear from a mechanical hard disk is a clicking or grinding noise. That means the drive is failing. At that point, the drive isn’t repairable. It’s time to back up your data and then replace the drive. You already have a backup though, right?

Not all drives exhibit symptoms in this way. Sometimes you’ll get the prohibitory no symbol at startup or a flashing folder with a question mark. After turning off your Mac and turning it back on, the system boots just fine. Other times you’ll get the spinning rainbow wheel, letting you know your Mac is waiting on something. That could be because your Mac is waiting on the hard drive.no symbol at startup or a flashing folder with a question mark. After turning off your Mac and turning it back on, the system boots just fine. Other times you’ll get the spinning rainbow wheel, letting you know your Mac is waiting on something. That could be because your Mac is waiting on the hard drive.

Diagnosing the Problem

If you suspect your hard disk is failing, it is time to make a backup. Now. Again, you should already have a backup of your Mac. Don’t proceed before you try to make a backup. Apple’s

Don’t have recovery mode? You’ll need an offline Mac installer to run Disk Utility off a USB drive.

When you reboot, you’ll see the

Some Macs have a built-in hardware diagnostic. Reboot your Mac holding down the D key. That runs a full hardware test on your Mac. The diagnostic will report any problems, including the hard drive.

Does your Mac Support Apple Diagnostics? Apple explains which models support this here.

Your Might Have a Confused Hard Drive

The Mac’s journaled file system usually keeps things in order. Glitches and improper shutdowns might leave things scrambled. If

You’ll need to boot your Mac off a Disk Warrior flash drive to do testing and repair. The program creates a Recovery flash drive. During its diagnostic process it will repair and optimize the drive. If it detects a hard drive error, the program warns you.

Sometimes it isn’t the Hard Disk

If you’ve tried all this and are still having problems, there could be something wrong with your Mac other than the hard drive. If you have a MacBook Pro, the ribbon cable that connects the hard drive to the rest of the computer can go bad. The Mac exhibits all the same symptoms as a failed hard drive. The best way to figure this out is to remove your hard drive and try it in another Mac. If the hard drive works on another computer, then it isn’t your hard drive.

Check to see if the repair is free: Check your serial number with Apple. Your Mac may still be under warranty.

The other typical problem is operating system errors. A system update or upgrade was interrupted leaving your Mac in a confused state. You can reinstall your operating system from the recovery mode. That won’t erase any data on your Mac.

Rarely the problem is in the Mac’s System Management Controller (SMC) . Before you give up hope, try Apple’s procedure for resetting the SMC.

What if You Have a Solid State Drive?

Apple Computer Tower

Solid State Drives (SSDs) don’t make the typical noises of a mechanical hard drive. After all,they have no moving parts. The testing procedures are the same. You won’t be able to easily remove the hard drive to test it in another machine. Programs like Disk Warrior are smart enough to change the optimization procedure for an SSD drive.

Some Macs have easy hard drives to replace. Some Mac models hard drives aren’t replaceable by end users. Most Mac-savvy retailers know the difference and can guide you towards the right repair. Replacing your hard drive with an SSD will give you the best performance, but may limit your storage space. We cover the differences here.

ALSO READ:DaisyDisk: The Best, Most Intuitive App to Find Large Files on Your Mac’s Hard Drive

Apple Hard Drive Transfer Sled

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