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I have lost datas in a memory card. So, I decided to use ddrescue. Fine. But after running command

sudo ddrescue -f -r3 /dev/sdb1 /dev/sda5 logfile, I lost all my data in /dev/sda5. I don't know why.

And I found that

Destination will be overwritten ─ so make sure destination is free of important data.

How can I recover my data in /dev/sda5? Should I continue to using ddrescue?

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  • This is spiraling out of control. I would stop until you understand the command better.
    – 111---
    Oct 12, 2017 at 17:44
  • You explicitly told ddrescue to format the sda5 drive with a copy of the sdb1 drive. Peculiar choice given that usually one wants to save an image of the drive, not ddrescue it onto another drive. But anyways, you told nothing about the file system that was on sda5. Oct 13, 2017 at 7:55
  • Please specify the sizes of /dev/sdb1 and /dev/sda5, as well as what /dev/sda5 was used for.
    – agc
    Oct 28, 2017 at 5:15

1 Answer 1

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It would be best to safely make the rescue image a regular file, like this:

sudo ddrescue -f -r3 /dev/sdb1 memorycard.iso memorycard.log

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