#Openzfs carbon copy cloner mac
Palahala: Aha, indeed it was not clear to me that you swapped the (source) disks in your Mac that uses Time Machine There just had to be another way around the problem, and indeed there seems to be! -) In my case I simply wasn't inclined to spend another several hours on a new copy of the disk after I had already been through it with Disk Utility. And Jobs only knows what would happen if both drives were present at the same time! It would get problematic when you chose to swap the drives again later on - Time Machine would then "back up" the difference between the newer drive and the older one, probably "removing" all the files in the newer backup which you had created since the switch to the new drive. If it's just about 1:1 replacement with immediate removal / erasing of the old partition, that is certainly an option if you're really careful.
You probably had it make an identical disk copy block-by-block which does indeed keep the connection to the backup but it could produce problems when both drives are present at the same time or alternatingly while the "hinted" solution still keeps them apart properly. Next, and this is the critical step, overwrite the UUID with the UUID you have copied from Disk Utility above (the UUID is represented by the X's in this example):
Whatever you do, do not forget the matching command below to re-enable it again! So if you are really, really certain that your new partition is in fact just a copy of your original partition, and you want Time Machine continuity, you can reconnect the last backup of your old partition to your new partition by overwriting exactly that UUID with the one of the new partition.įirst temporarily disable ACL protection for the backup drive: If the UUIDs are identical (which they won't be, yet), Time Machine will make an incremental backup If they don't match, it will back up the entire partition again. The command will print out a UUID, just like the one displayed in Disk Utility above. Replace my_partition with the name of the partition that you'll be swapping the UUIDs on. For safekeeping, display the old partition's UUID before you do anything else - this is the one that Time Machine has attached to your backups: This directory will hold one (or more) folders, each named after one of your drives or partitions.
#Openzfs carbon copy cloner full
Replace /Volumes/my_backup with the full path to your (new) Time Machine drive/partition, and replace my_mac with the name of your Mac as shown on the Time Machine drive. $ cd /Volumes/my_backup/Backups.backupdb/my_mac/Latest Then open Terminal and go to the last Time Machine snapshot: You will need the Universal Unique Identifier value select it with the mouse, copy it, and paste it somewhere for use later. Next, open Disk Utility, select your new partition and press Command-I to display the partition's information. It does seem to work with an image copy, though.Īfter the image is done, remove the old drive/partition, or otherwise disable it, so that you're not confused by its presence - all commands that follow will refer only to the new partition, and a change will be made only to a folder in the Time Machine backup. I have not tested whether a mere file copy of a partition can be re-connected successfully so that only incremental backups are made. The copy will be almost identical to the original - only the drive ID (UUID) will be different, and that is why Time Machine would try to make a complete backup if we didn't do something to prevent it. Progress will then be shown as copying blocks instead of copying files. Don't forget to select Erase Destination, or it will in fact just make a file copy. In Disk Utility, select the target disk (which must have been partitioned so your Mac can actually boot from it!), click Restore, drag the target partition to the Target field, and the old partition to the Source field. Start from a different disk if you want to copy the system partition (use the System DVD if necessary). I know it works with an image copy of your partition.ĭISCLAIMER: Do this at your own risk! Have a backup of at least your most important files on a separate medium! Do not attempt this if you are uncertain about any of the consequences or circumstances here! There are no guarantees that the following will work for you! In this case, I used this hint to re-connect Time Machine after migrating a partition from one hard disk to another one. This hint is inspired by and uses tricks introduced by the hint Repair Time Machine after logic board changes, and is used for a similar purpose.
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