How to access a back up on Time Machine without a broken hard drive?

Hello, is there a Time machine expert out there?


My external drive that holds ALL my data and photos has broken.

It was all backed up to Time Machine on a second, dedicated TM hard drive, which is fine.

I can’t access that backup though, because I can’t mount the broken drive.

So, how do I access the backup in TM, without the broken hard drive?


Any help would be much appreciated!


Thank you!…




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iMac 27″, macOS 12.1

Posted on Jan 23, 2022 12:57 AM

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Posted on Feb 23, 2022 5:59 AM

Just to update anyone interested. I eventually got to the bottom of this issue..


In short, if you exclude ANY partition of an external hard drive, within TM preferences, then time machine will exclude THE WHOLE external hard drive, regardless of whether or not you actually exclude any other partitions.


So, all the while I was thinking I was backing up 2 out of 3 partitions in TM, I was actually backing up none of it.


So, I have lost all my data, including 80gb photo library.


I now have a good understanding of TM, its limitations and how to backup with the cloud etc in future.


Gutted.

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Question marked as Top-ranking reply

Feb 23, 2022 5:59 AM in response to docweif

Just to update anyone interested. I eventually got to the bottom of this issue..


In short, if you exclude ANY partition of an external hard drive, within TM preferences, then time machine will exclude THE WHOLE external hard drive, regardless of whether or not you actually exclude any other partitions.


So, all the while I was thinking I was backing up 2 out of 3 partitions in TM, I was actually backing up none of it.


So, I have lost all my data, including 80gb photo library.


I now have a good understanding of TM, its limitations and how to backup with the cloud etc in future.


Gutted.

Jan 23, 2022 6:18 PM in response to docweif

docweif wrote:

thank you..
The key thing really, is - Within TM, how can you access data from a drive that's no longer plugged in.

Having completed my testing, you don't have to have the drive connected. However, not every backup may have anything from that drive backed up. If it doesn't, then the drive does not show up. You almost have to go hour-by-hour, day-by-day, week-by-week, month-by-month to find a backup that has the external drive on the backup. If you have a roundabout idea, it might not be too difficult to zero in on a particular backup.

I would imagine a daily or weekly would almost always have something backed up. However, if you weren't changing anything, maybe you have to go back quite a ways to find a backup of that drive.

Jan 23, 2022 5:46 AM in response to docweif

In Finder, try Go > Computer. Then, Enter Time Machine. Go back in Time and see if the drive appears at some point.

Another guess would be to connect a new drive with same name and Enter Time Machine from there.


I have only tried to restore an external once, but the drive was still working. I decided it was too cumbersome to use Time Machine that way and started using Carbon Copy Cloner for my external drives.

Jan 23, 2022 8:33 AM in response to docweif

I used to have two startup volumes on my laptop when I switched over to Monterey (the old Big Sur startup). Because it was Big Sur, it had a Data volume that got backed up by my Monterey startup. I have since deleted that volume.

When I go back in time and use Go to Computer (cmd-shift-C) I see the old data volume in my backups.

There should not be any difference between that volume and a volume mounted from an external drive.


I'm going to do some more testing with a few external drives and see what I can figure out.

Feb 23, 2022 10:16 AM in response to docweif

I understand a bit how that feels as I lost data on OneDrive a few months ago.


Here are a few things to consider/try:


1) Give Apple Support a call to discuss and confirm you understanding of Time Machine. You'll probably want to ask for a senior advisor specializing in Time Machine issues.

2) Perhaps the failed disk is not a complete write-off. There are data recovery companies that specialize in recovering data. However, the price tag may be steep.

3) When automatic Time Machine backups are enable, I believe that the local snapshots of the system volume don't exclude data (even if excluded in Time Machine options). These snapshots disappear fairly quickly but can be mounted using the Disk Utility. Perhaps you could retrieve some data in this way.



Jan 24, 2022 9:11 AM in response to Barney-15E

I've now done a bit of testing..

If I go into TM and look at a backup that was done today, I can see an external drive, (I bought a new one), in the side bar, and access its data.

If I then come out, eject and unplug that drive and go back into the same backup, that drive has now disappeared from the side bar.

If I then plug it in, (whilst still in TM), it then pops up in the sidebar.

So it does seem that an external drive must be mounted, to be seen in any backup in TM.

So, how can I access the illusive data on the broken drive, if I can't plug it in and mount it?



Jan 23, 2022 6:24 AM in response to lllaass

Hi thanks for responding...

I'll try to be clear, as it's a bit confusing..

Drive#1 is the broken drive, (With all the photos and data on it), but it is backed up on drive #2, (the dedicated TM drive).

My problem is, when I go into TM I can't see Drive #1 anymore, because it's no longer mounted, (So it no longer appears on the left hand side), so I can't access the backup or any date, even though I know the backup is in there, somewhere.

Hope that makes sense?..

Thanks

Jan 23, 2022 6:54 AM in response to docweif

docweif wrote:

Hi thanks.
No, just the dedicated TM drive is used for TM, Nothing else and the other drive (The broken one), is only used for data and photo library.

Use wrote " Drive#1 is the broken drive, (With all the photos and data on it), but it is backed up on drive #2, (the dedicated TM drive)"


" My problem is, when I go into TM I can't see Drive #1 anymore, because it's no longer mounted. So it no longer appears on the left hand side), so I can't access the backup or any date, even though I know the backup is in there, somewhere."


Since the problematic Drive is not used for Time Machine Backup - why is one using Time Machine to look for Backups that are not there.


One says there is a Dedicated TM Backup Drive that is Not the Problematic Drive


I am just not getting it

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How to access a back up on Time Machine without a broken hard drive?

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