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Make a partition of an exact size for cloning
Note the number of 512-byte blocks, and then add 262144 to that number. Why 262144? Because that amount is added to each partition, for "future use by Apple, and are populated as needed for some boot methods, such as AppleRAID booting on PowerPC systems," according to this email message.Actually, these extra blocks are not added to the partition you want, but are a separate partition. If you use pdisk -l in the Terminal, you will see a full list of partitions on each disk. At the start of the disk, you will find a number of partitions related to booting and drivers. Then you will find a 128MB (262144 blocks) partition, and another between each of the other partitions. So if you want a proper clone of your original partition, *don't* add the 262144 blocks.
Make a partition of an exact size for cloning
Your experience may vary, but I found that when I did not add the extra 262144 blocks, the new partition - the one I wanted to use for the clone - was too small by exactly 262144 blocks. I verified this both with the diskutil info command, and also by looking at the disk size in the Finder.
Make a partition of an exact size for cloning
i was able to just copy+paste the log byte number in the disk utility, and it came out EXACTLY the same as the original disk size. Even if the number is long, just paste it in the box, it'll format appropriately! ;) |
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