Unable to back up on Time Machine Solved

Question

Hello, I wanted to make a Time Machine backup, but it's impossible because the following message appears: "Two of the disks to be backed up have the same name: 'SSD Crucial'. Please rename one of the two." However, this problem did not exist until now. Nevertheless, when I connect the external hard drive and go to Time Machine, two disks appeared, and this worked fine until today. I don't know how to rename one of the disks; if I change the name, it changes the name of both disks. Do you have any ideas? Thank you.   Configuration: Macintosh / Firefox 69.0

*_Francis_* · Accepted Answer

EDIT :  If in reality there is only one disk assigned to Time Machine, but the Mac is "seeing double," the solution would be to remove the disk(s) in System Preferences / Time Machine and then reassign it...  To do this:  - Disconnect your disk from the Mac.  - Open System Preferences / Time Machine  - Open Options, the button in the bottom right,  - Select the disk or disks that are supposed to be affected, and choose "Remove"... confirm...   At this point, there should normally be no Time Machine disk assigned.   We will now reassign the existing backup on the disk, and thus the Time Machine disk to the Mac...  The procedure:  - Connect your Time Machine disk to the Mac  - Open System Preferences,  - Designate the disk as your Time Machine disk, but disable automatic backups for now  - Open the Backup.backupsdb file located on the Time Machine backup  - You should see a folder named after your Mac  - Launch Terminal located in Applications / Utilities  - In the Terminal window, paste this command  sudo tmutil inheritbackup  - type a space  - Drag and drop into the Terminal window, the folder named after your Mac found in the Backup.backupsdb folder of the Time Machine disk  - Confirm.  Normally, at this point, it should be fine.  In the Finder's menu bar, from the Time Machine icon, you should now have the option to "Back Up Now" or "Enter Time Machine" to restore folders, or the option to put Time Machine in automatic backup mode.   Note: Before carrying out this procedure, first try a repair by starting the Mac from the recovery partition... that may be enough to resolve the issue...  https://forums.commentcamarche.net/forum/affich-37641569-entretenir-et-reparer-macos-x-10-12-10-13-et-suivants  or depending on the version of the OS  https://www.commentcamarche.net/faq/36405-entretenir-et-reparer-mac-os-x-10-7-os-x-10-8-os-x-10-9-os-x-10-10-lion-mountain-lion-mavericks-et-yosemite

*_Francis_* · Answer

Hello,  Your explanations are not very clear to me.  Do you really have 2 disks with the same name "Crucial SSD"?

topemeraude · Answer

Yes, it's in this sense that I don't understand and don't know how to remedy it.

*_Francis_* · Answer

Did I ask my question wrong?  Do you actually have 2 physical SSDs? I'm not talking about the display in Time Machine, but the physical devices connected or questionable to the Mac...

topemeraude · Answer

No, I don't have two drives but the same external drive named twice when I connect the backup hard drive I absolutely don't understand what's going on, a message tells me that these drives have the same names and that I need to change the name of one of the drives, I should take a screenshot so you can understand what's happening, it's annoying

*_Francis_* · Answer

Hello,  In the screenshot, it states "DDE Western Digital," but at the beginning of the discussion, you mentioned SSD Crucial... could it be due to a name change?  Otherwise, having the same drive represented twice is normal; see my example below. However, it shows that on my end, only one representation is marked with the Time Machine icon.    Do you have 2 Backup folders on this drive (meaning 2 separate backups)?

topemeraude · Answer

Indeed, I made a mistake regarding the indication of the disks. The message said 2 Crucial SSDs with the same name and asked me to change the name, so it’s an error in my wording.  I will take another photo so you can see it better, but for the backup disk, there is only one partition, one single backup possible.   Here is the screenshot after pressing the "presentation" and "all devices" keys.

topemeraude · Answer

Oh really, it gets complicated, how can I find that out? On the other hand, I didn’t find the "time machine" icon in the finder and the menu bar, it’s only in system preferences.

topemeraude · Answer

It must be that then, it seems there is only one folder

topemeraude · Answer

No, I erased the backup disk to clean it, so it's empty, and no backup has been made to date.  There are 86 GB on my Mac, and it's scheduled for 11 hours of backup, at least that's what the external hard drive indicates.  I've tried three times.  I'm going to do it tonight, hoping it doesn't damage the Mac.  What do you think?

topemeraude · Answer

There is a new problem, I don't know what this new disk "Container disk 1" appearing in Disk Utility means.

Unable to back up on Time Machine

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