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I've booted up arch live cd, with the idea of creating a disk image. There are 2 hdds (/dev/sda - i want this image, and /dev/sdb - the image will be copied here, but as a backup file (not rewrite), so i can use it later)

fdisk output

So I mounted the /dev/sdb1 as:

mount -t auto /dev/sdb1 /mnt/hdd

And then i tried 

ddrescue if=/dev/sda of=/mnt/hdd/backup.dd

But it failed saying cant open input file, no such file or directory.

What am I doint wrong?

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  • sda1 rather than just sda?
    – Kusalananda ♦
    Commented Jun 16, 2016 at 16:26
  • @Kusalananda that would just create an image of the first partition, which is usually not what you want when you're trying to make an image of the whole disk.
    – Martin von Wittich
    Commented Jun 16, 2016 at 16:33
  • Ah, sorry, my bad.
    – Kusalananda ♦
    Commented Jun 16, 2016 at 16:34
  • @Horkyze please post a screen shot of the ddrescue command you entered along with the output. Without that we can't be sure that there isn't a typo somewhere in your command. Please also post a screenshot of the results of ls -l /dev/sd*.
    – Martin von Wittich
    Commented Jun 16, 2016 at 16:34
  • On the screenshot, where it says I/O error, device fd0 -- fd0 usually signifies the first floppy disk. Perhaps there's some other reason not given for imaging the first hard disk /dev/sda?
    – agc
    Commented Jun 16, 2016 at 16:57

1 Answer 1

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According to its man page, ddrescue should be called like this:

SYNOPSIS
       ddrescue [options] infile outfile [logfile]

So, in your specific case, ddrescue /dev/sda /mnt/hdd/backup.hdd; no if= or of=.

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  • i feel embarrassed now why did i assume that the synopsis is same as dd... thanks
    – Horkyze
    Commented Jun 16, 2016 at 17:19

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