It is absolutely critical to backup a failing disk, as not doing so can and will result in permanent data loss. #Disk smart utility mac** The simplest way to back up a Mac hard drive is with Time Machine. For the example, “APPLE SSD SM0512G Media” would be the drive, whereas “Macintosh HD” would be a partition on that drive, thus you’d want to select the “APPLE SSD SM0512G” option rather than any partition. * The actual disk drives usually have a name that is related to the manufacturer of the disk itself. Note that not all external drives and external disk enclosures include support for SMART status, so some volumes may not report any SMART finding or information. If the disk or drive is not showing up in Disk Utility at all, and you’re looking at Disk Utility from another volume or boot drive, that suggests either one of the following: the drive has already failed, is periodically failing and will soon completely fail, or at best the disk is somehow not connected physically (highly unlikely but vaguely possible that an internal connection came loose). Help, I can’t see my disk / drive in Disk Utility at all! Having a routine of checking, verifying, and repairing a disk, as well as backing up the Mac, are good general Mac maintenance tips that should be followed anyway. If you are experiencing strange disk issues but the SMART Status reports as “Verified” with no error messages, then you can try and verify and repair the disk with Disk Utility from Recovery mode, or with fsck from Single User Mode or the Recovery mode Terminal. SMART Status reports no errors, but the disk is having a problem You can also run First Aid and verify and repair drives in Disk Utility on the Mac, but issues that are repairable by Disk Utility are almost never SMART failures or any other hardware problem. It’s a good habit to routinely backup a Mac with Time Machine or another backup option anyway, but it’s extra important to immediately backup if you see any failing message pertaining to SMART Status or any other fatal error in the Disk Utility app.
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