![]() If you can boot into Linux of any flavour then ddrescue will clone your hard disc to another. However, Spinrite costs $89, but you get a lifetime personal licence and a money back guarantee if it disappoints. If it was a transient error from a physical jolt or a voltage spike during a write and the disk is otherwise in good health, you can continue using it. It’s far more persistent than any OS or the drive’s internal error recovery logic. Spinrite can often recover unreadable sectors by doing its own error correction on the aggregate data accumulated from many reads. Unless you can boot your iMac into Linux and DOS utilities (I don’t know whether that’s possible) you’ll need to take out the hard disk and temporarily attach it to a PC. Take a look at Advanced Hard Disk Tools in the Restarters Wiki. File system repair utilities are of limited use in such cases. It sounds like you’re disk has got physical surface defects. ![]() ![]() Problem -69842 occurred while restoring the original mount state.Restoring the original state found as mounted.The volume Govind's could not be verified completely.Incorrect block count for file 2018.09.18.G80.asl.Performing fsck_hfs -fy -x /dev/rdisk0s4.Restoring the original state found as unmounted.The volume Macintosh HD could not be verified completely.Performing fsck_hfs -fy -x /dev/rdisk0s2.Ran disk utility first aid to check internal HDD Please help to recover data… as I do not have a back up
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