Note: This is not a solution to the problem but provides some insight into what is happening.
I followed the instructions for Quick Apple Raspberry Pi Machine and formatted a hard drive to HFS+ and installed netatalk on a Raspberry Pi 3B clone; everything worked fine.
I went into Time Machine settings and the network drive was recognized and added. Since this was over ethernet, the backup took about 13 hours to complete.
I did try connecting the drive to my Archer AX50 and configured the settings for a Time Machine shared drive. Time Machine did not see the drive. This seems logical since the router shares the drive using Samba/SMB, not netatalk.
Conclusion:
A recent update to macOS Sonoma has broken the ability for Time Machine to see a network drive; this is probably somewhere within the Samba/SMB protocols implemented by Apple.
Answer from agarza on Stack ExchangeHello all,
I have a Toshiba external hard drive of 2TB. I have made a partition of 300GB for making backups. However, when I click on "Add Backup Disk", a window appears and says "No available Time Machine Destinations"
What do I have to do to make my partition be available for Time Machine? I have tried setting up the partition as primary and also logical partition with the same result. Also, I have formatted the partition as journaled.
Thank you in advance and regards
Note: This is not a solution to the problem but provides some insight into what is happening.
I followed the instructions for Quick Apple Raspberry Pi Machine and formatted a hard drive to HFS+ and installed netatalk on a Raspberry Pi 3B clone; everything worked fine.
I went into Time Machine settings and the network drive was recognized and added. Since this was over ethernet, the backup took about 13 hours to complete.
I did try connecting the drive to my Archer AX50 and configured the settings for a Time Machine shared drive. Time Machine did not see the drive. This seems logical since the router shares the drive using Samba/SMB, not netatalk.
Conclusion:
A recent update to macOS Sonoma has broken the ability for Time Machine to see a network drive; this is probably somewhere within the Samba/SMB protocols implemented by Apple.
For Posterity, this appears to have been resolved at some point between 14.4.1 and 14.5. But is not in the release notes that I could find. Potentially an unexpected consequence related to another issue.
Where has the Time Machine gone?
How do I get to Time Machine settings?
Why has Time Machine stopped backing up?
Edit: Turns out, I had forgotten to enable "Multi-user Time Machine" under the "Purpose section for the SMB settings. After I enabled that, it works.
Hello all,
I followed this guide - https://www.reddit.com/r/truenas/comments/11gmee8/truenas_scale_22121_time_machine_backup/ to set up a backup for my 2021 M1 MBP running Sonoma 14.5. I can find the server under "Locations" in finder and can connect to it (I connect to it using my Mac's username and password). And I can see the different folders that I have made in the dataset. But, when I select "Add Backup Disk" in system settings, I get the error "No Available Time Machine Destinations"
I found this post - https://www.truenas.com/community/threads/smb-mdns-service-discovery-broken-macos-ventura-can-no-longer-see-truenas.112643/page-2#post-803897 and did what he recommended which was to disable and enable mDNS under Network > global > settings. I also set up a cron task to restart avahi daemon, but no luck. I also restarted the server and the laptop.
Thanks in advance!
This is from an Apple Support article:
If your network server or NAS device supports Time Machine Bonjour notifications, you can set up Time Machine backups even if you are not connected to the server. If your server does not support Time Machine Bonjour notifications, you may still be able to set it up as a Time Machine destination by connecting to the server using SMB and then selecting the mounted network disk. After you set up the network disk in Time Machine settings, Time Machine automatically reconnects when it’s time to back up or restore your data. If your backup disk is on a network, the network server can use SMB file sharing. (Your Mac must be connected to the SMB server when you set up Time Machine.) After you select the network disk in Time Machine settings, Time Machine automatically connects to the disk when it’s time to back up or restore your data.
https://support.apple.com/en-mn/guide/mac-help/mh15139/mac#:~:text=If%20your%20backup%20disk%20is,up%20or%20restore%20your%20data.
Windows does not advertise shares over Bonjour, so they won't automatically appear in the list of possible backup destinations in Time Machine settings. If, after manually mounting the share in the Finder, it still doesn't appear, try the steps in this article:
https://www.imore.com/how-use-time-machine-backup-your-mac-windows-shared-folder
So you’ve already created an SMB file share from what I can tell. The missing piece is using your Mac to create a sparsebundle disk image using Disk Utility and placing it on your SMB share. Once you mount that you should be able to select it as your backup destination.
I followed the directions here to get it working - https://www.imore.com/how-use-time-machine-backup-your-mac-windows-shared-folder
I'm afraid what you want is not achievable.
Firstly, the reason the Backup002 drive cannot be seen by Time Machine is that it must be formatted APFS to be used. HFS+ drives could be used on older macOS but not since big Sur.
Strictly speaking, t will allow to to continue to use an HFS+ disk if a Time Machine backup is already on it. It will not allow you to start a new one. - https://support.apple.com/en-gb/guide/mac-help/mh15139/mac
Secondly, you cannot set two different backup strategies for two Time Machine backups. This would mean Time Machine will simply make the same backup to each partition in turn, separated by an hour.
IT worked for me when I connected it to my windows machine and used "Disk Manager" to delete the partitions and create then in exFAT format.
When I connected it back to Mac, Time Machine was able to see the exFAT partition.