iMac (late 2015) running Monterey 12.7.6: never a problem with TM backing up to Seagate 10TB HD. Now it does not recognize the drive and I cannot "add" the Seagate as a TM drive. Seagate is formatted APFS, previously used as TM backup; "Ignore ownership" is checked; I am given R&W permission but cannot add myself as Administrator or change any privileges.
Here is an Apple article regarding what @Need_help_give_help is suggesting:
Add, delete, or erase APFS volumes in Disk Utility on Mac - Apple Support
I'm only providing this so you don't actually create any partitions on the drive since that will just make things worse. A new APFS volume acts like a partition, but doesn't make any critical changes to the drive layout.
Here is an Apple article regarding what @Need_help_give_help is suggesting:
Add, delete, or erase APFS volumes in Disk Utility on Mac - Apple Support
I'm only providing this so you don't actually create any partitions on the drive since that will just make things worse. A new APFS volume acts like a partition, but doesn't make any critical changes to the drive layout.
If there's no data on the Seagate TM drive that you can't lose go ahead and erase and reformat it as APFS. Time Machine when it starts using a "new" drive will reformat it as : APFS with no access for any user but read only. It's listed in the Info pane as "Custom Permissions".
That should jumpstart the drive as a Time Machine backup drive.
On current versions of Mac OS that is not possible however on older versions of Mac OS you could migrate Time Machine backups to a new drive. To be honest Idon’t know if Monterey can or cannot as it’s pretty old by today’s standards.
I wonder whether you can create another Volume on the external drive with your older TM retained on its own volume?
You might find that when you open TM preference the new volume will be an option to use as new TM backup.
Or
You could create a new container, a “partition”, leaving the original TM backup on the minimal size container. Again the TM backup might recognise this new container as available,
The drive is still readable, able to access the previous TM b/u files on it, but I was hoping to continue using it for TM since there's only 1TB stored on this 10TB HDD. Perhaps I may try to backup that 1TB to another drive and then just used the 10TB Seagate for "manual" backup for redundancy. Is it possible that I might reformat the Seagate and try again?
Thanks for your input - appreciate that!
Yes, the iMac is so old that it won't take any upgrades at all, so I am simply running it until I decide on a new system. Using a more recent MacBook for most things but the iMac is usable for more mundane needs.
Thanks again...
Time machine is a possibility?
But not something you can trust 100% on!
I had, Reinstalling my old vintage Macbook,running, 12.7.6 Monterey this April!
Not from my Toshiba 1Tb. extern harddrive,which did´nt work that night!
So i erase the harddrive and reinstalling the 12.7.6 Monteray without my extern Harddrve!
My "new Macbook",with 12.7.6 Monterey, running so Perfect this day,but i will not do this reinstalling on more time!
Reinstalling my old Macbook 2015 running Monterey 12.7.6, this April.
Trying to reinstall from the Time Machine Copy on the extern harddrive,but some Errors occur!
Rinstalling the Mac Os ,command , option .R, and the Globe was shown!
Reinstalling first High Sierra ,then, Mojave, and final Monterey!
My Vintage 2015 Macbook running so fine this day,
but i don´t want to reinstall,this vintage Macbook Again!
Next time will my old Macbook be converted to LINUX.
Seagate enclosures are fairly low quality and tend to overheat. If the drive is over 5 years old just replace it. Take the old one to you technology recycler.
Thanks for that idea - I may try one of your suggestions & see what happens...
I will check it out - so, Thank You!
Time Machine doesn't recognize external Seagate HDD
