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Old 09-22-2018, 05:20 PM
Irl Irl is offline
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Join Date: Jul 2009
Location: Taxachusetts
Posts: 31
Migrating Time Machine to a new disk

My old (2009, 1 TB) external HD is showing signs of needing to be replaced. It is partitioned (GUID Partition Map) into an 800 GB APFS container with several volumes on it and a 200GB Mac OS Extended (Journaled) partition (MBTMach) used by Time Machine. I want to migrate to a new drive and retain the Time Machine backups. I propose to do this as follows; please comment!
  • Partition the new drive similarly to the old including a Mac OS Extended (Journaled) partition MBTNew
  • Turn off T M
  • Rename MBTMach to MBTOld
  • Use SD! (in restore mode, right?) to copy MBTOld to MBTNew.
  • Dismount MBTOld and rename MBTNew to MBTMach.
  • Then turn T M back on.
Will this work? Anything I should beware of?
The new drive will be connected directly to one of the USB-C ports on my MacBook and the old one (which is Firewire 800) to a different port using a couple adaptors (USB-C to Thunderbolt 2, TB 2 to Firewire). MBTMach currently has about 100GB of data, so I'm anticipating about 20 minutes for the transfer (since the FireWire will presumably be the bottleneck).
Do I have to do anything about indexing? I have told Spotlight to not index MBTMach and plan to keep it that way.
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