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10.5: Reconnect Time Machine backup after drive swap
I found that this hint was insufficient to reconnect my migrated-to hard drive to my existing backups.
The first thing missing was that in addition to replacing the UUID in the SnapshotVolumeUUID xattr, I also needed to replace the UUID in the SnapshotVolumeFSEventStoreUUID xattr. The UUIDs, however, are different. The UUID required for SnapshotVolumeFSEventStoreUUID comes from /Volumes/my-volume/.fseventsd/fseventsd-uuid, e.g.,
NOTE:the UUID ends in "1" above, just before the 'b' in the bash prompt. Also, the value for these attributes appears to require the trailing zero byte. I could not figure out how to get the xattr command to add that zero byte, so I wrote the following C program to do it using the setxattr() call. If you do not know how to compile and run a C program then this may not be for you. Use this at your own risk; I assume no risk and make no promises. I will not provide binaries.
Finally, I did not find a need to set the attributes anywhere except under the Latest backup. After updating the two attributes with their respective UUIDs I was able to complete an incremental backup rather than a completely new one, and all was good.
10.5: Reconnect Time Machine backup after drive swap
As far as I know, the SnapshotVolumeFSEventStoreUUID is only for optimization: --- There are no problems... Edited on Jan 05, '10 06:42:23AM by only_solutions
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