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Recover missing-but-there Time Machine backups System
Yesterday, I had problems restarting my Mac mini, so I booted off an external hard disk with a clone, and fixed the startup problem. This morning, I needed to find a file in my Time Machine backup, but all my backups prior to the moment I booted from the external disk were dark in the Time Machine timeline (at the right of the screen). In the Finder, I could only access those created since last night.

The backups were still there, though, and the Time Machine System Preferences pane recognized the date of my first backup as the oldest backup on my Time Machine disk.

I searched for solutions, and found none. Then I recalled an older hint about browsing other Time Machine backups by holding down the Option key while clicking the Time Machine icon in the menubar. So I tried that.

Only the one Time Machine disk showed up, and I selected it, and was able to access all my backups in the Time Machine interface. I left Time Machine and went back to the Finder. When I entered Time Machine from there, all my backups were now accessible, with the exception of the three oldest. I don't know why they all didn't come back, but at least I got most of them back. So if your Time Machine backups have entered a missing-but-there state, try the Option key solution to get them back.
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Recover missing-but-there Time Machine backups
Authored by: robogobo on Feb 19, '10 12:53:26PM

Often I've found that turning Time Machine off, unmounting and remounting the disk, then forcing a backup ("backup now") from the menubar icon will have the same effect, as well as reassociating a severed backup file. But your method is much simpler.



[ Reply to This | # ]
Recover missing-but-there Time Machine backups
Authored by: Herve5 on Feb 20, '10 10:01:00AM
"...but all my backups prior to the moment I booted from an external disk were dark..."

My (uncertain) understanding of this is, to TimeMachine as soon as you're not anymore on the very same system and CPU hardware, the backup does not belong to this machine.
So, whenever you boot from your external disk, you cannot access the previous backups, unless you use the "option" procedure which basically tells TM to specifically look elsewhere for once.
Mind you, this happens too if you had a CPU card repaired or exchanged by Apple. You come home smiling with an almost brand new machine, and then TM just won't work. You call Apple. Only answer: option key, no other solution...

[ Reply to This | # ]
Recover missing-but-there Time Machine backups
Authored by: Herve5 on Feb 20, '10 10:02:55AM
"...but all my backups prior to the moment I booted from an external disk were dark..."

My (uncertain) understanding of this is, to TimeMachine as soon as you're not anymore on the very same system and CPU hardware, the backup does not belong to this machine.
So, whenever you boot from your external disk, you cannot access the previous backups, unless you use the "option" procedure which basically tells TM to specifically look elsewhere for once.
Mind you, this happens too if you had a CPU card repaired or exchanged by Apple. You come home smiling with an almost brand new machine, and then TM just won't work. You call Apple. Only answer: option key, no other solution...

[ Reply to This | # ]