Whenever a disk error is found, you should be alert to peculiar program operation, missing partitions, or other oddities; and you should perform at least minimal checks and verification of the data.
This method has the advantage, though, that you can print the data on paper for safekeeping with other hardcopy information on your computer.
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You should use this option with caution, though; if the disk really is a valid MBR disk, this option could conceivably damage the first or last MBR partition!The e option on the experts' menu relocates the backup data structures to the end of the disk.The latter must be as large as or larger than the former disk, and the backup will take a long timeprobably measured in the hours.Return to my main web page.In this example, I was able to use GPT fdisk normally from this point on, despite the caution; however, as a general rule, you should pay attention to such warnings.
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The partition table scan, which is shown by gdisk (but not sgdisk) even on healthy disks, indicates that the GPT data structures were damaged.In doing so, the program checks the CRC values stored in the main and backup headers, and it performs various other sanity checks.This option can be useful if GPT fdisk mistakenly interpreted an MBR disk as a GPT disk, or if the GPT structures on a hybrid MBR disk were very badly damaged but the MBR definitions remain intact.This Web page, and the associated software, is provided free of charge and with no annoying outside ads; however, I did take time to prepare it, and Web hosting does cost money.If the program produces competing recommendations, though, your task is harder.I cannot temple running game for pc test every possible problem, though, and so it's possible that a particular type of disk error will cause GPT fdisk to misbehave in strange ways or even make the problem worse, particularly if you use the w option to save changes you make.What's a GPT?, GPT includes stored CRC values to help utilities spot problems and redundancy to help recover from them.
Therefore, a backup of a corrupt partition table, when restored, might not exactly replicate the original corrupt state; it could be even worse!
If both headers are damaged, you may be better off rebuilding a new one.