![]() I also tried copying the partition tables using sfdisk but it failed because “ first lba specified by script is out of range”. I’m guessing I need to dd the synthesized disk from macOS but there is obviously something wrong with the USB driver since it’s writing so slowly. But macOS still refused to do anything with it. So I recreated the partition map using parted and then restored the partitions. But the drive didn’t have a partition table and macOS just read the drive as having something like 65 GB and refused to mount it. I also confirmed the same way in recovery using dd and md5. I confirmed that the first 100 MB between the drives were the same (used dd and md5sum). I also was able to test within a virtual machine and got the same 270 MB/s speed. ![]() I booted into Linux and did a copy of the drive (using dd if=/dev/nvme01 of=/dev/sdb) and it was much faster at 270 MB/s. ![]() I tried to use dd in recovery mode using the command dd if=/dev/disk0 of=/dev/disk4 bs=100m but it was going super slow at 18 - 19 MB/s. Though, I think the issue may lie in the fact that my internal drive has a sector size of 4086 bytes and my external drive has a sector size of 512 bytes. My internal drive is 500GB as is the external drive. I do not have a T2 chip, but I do have a T1 chip. My MBP is using GPT with APFS, the standard now-a-days. I want to clone my internal drive to an external one, byte for byte, partition table to partition table.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |