What is error code 256 when cloning hard drive with Disk Utility

MacBook Pro 15" mid 2012 OSX El Capitan with 1TB SSD to be replaced with a 2TB SSD.

Full error message /sbin/newfs_hfs failed with error 256

Could not restore – Resource busy

Operation failed…

Grahame’s MacBook Pro

Posted on Jul 31, 2023 4:28 PM

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What is error code 256 when cloning hard drive with Disk Utility

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