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How to Change the UUID of a Linux Partition (adapt to your needs and values)ĭuplicated UUID’s can be a big problem on your machine. Since the partitions were created with Linux, and accessible in Linux, why not use Linux to change the miscreant UUID? The pvUUID (light violet) and lvgUUID (light yellow) appear in hex in the first block and the last block of the partition:Īnd as text each four times in the last 32760 blocks (512 byte physical block size) of the partition in plist-like items. The diskutil cs list output of the original disk: diskutil cs listĬoreStorage logical volume groups (1 found) Some bits of the UUID have a special meaning and determine UUID version or the hash algorithm. Don't use arbitrary (ie self-made) UUIDs but try to generate them with uuidgen or online with a UUID generator. The pvUUID/lvgUUID has several additional occurrences in the metadata area of the Logical Volume Group of disk3s2. AFAIR the pvUUID and the lvgUUID are located at the first block of disk3s2. You may change the various UUIDs manually by editing the raw disk content with a tool like He圎dit or wxHe圎ditor of course.
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I checked this in 10.9/10.10/10.11/Recovery HD by searching the whole disk even inside packages with FileBuddy. It's neither in the path nor can I find a file with this name elsewhere on the disk. The bad news is: I can't find the tool/script. Then the command in your case would be: csunique -v -n /dev/rdisk3s2 #dry-run
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The good news is: there is a man entry for a tool which can change the UUIDs of all CoreStorage metadata objects: man csunique.Ĭheck the disk identifier of the duplicate with diskutil list. So it's indeed a problem of the duplicate UUIDs of the Logical Volume Group/Physical Volume/Logical Volume Family/Logical Volume of disk0s2 and disk3s2. Cloning a CoreStorage container to another disk with dd doesn't change the UUIDs of the CoreStorage items. I have tested your set-up in a virtual machine with the same result - the second CoreStorage volume won't be mounted. I still haven't found a way or tool to change those partitions GUIDs safely (where I can mount them without compromising their data). it's the /dev/disk1 (from /dev/disk0s2).Īctually this happens because both disk GPT GUID and partitions GPT GUIDs share the same UUIDs. My /Volumes/Macintosh HD lists the Macbook filesystem itself, ie. Am I missing something? What should I do to mount this partition? Updateįrom what I've understood the problem happens because both /dev/disk0s2 + /dev/disk3s2 and /dev/disk0s3 + /dev/disk3s3 shares the same disk label. I can't mount /dev/disk3s2 inside macOS although I can do that when using Ubuntu.
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The last partition Time Machine was later created with the free disk space that was left. The first 3 partitions are an exact copy of /dev/disk0 at the time I did the clone. The external hard drive is the /dev/disk3. But unfortunately when I try to access this drive on macOS itself the Apple_CoreStorage partition doesn't mount.Ģ: Apple_CoreStorage Macintosh HD 499.2 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3Ġ: Apple_HFS Macintosh HD +498.9 GB disk1ģ: Apple_Boot Recovery HD 650.0 MB disk3s3 When I plug this external drive using Ubuntu I can access all partitions. I successfully cloned everything without much issues. Recently my Macbook's hard disk started to get badblocks and I promptly managed to make a disk clone with ddrescue into an external drive through an Ubuntu live session.
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