I would like to get data off from one external drive to another. Unfortunately some files must be corrupted or has issues. Whenever I try to copy everything (15TB) the whole macOS Sierra OS just freezes and die.

I've tried copying using disk utility, command lines and other tools such as CCC and superduper. All the same thing.

I came across this thread How to identify and fix files with corrupted / inaccessible disk blocks

And I was able to identify one bad file (for now). But it doesn't explain how I can bypass that and just copy over only the good files.

What should I do to copy just the good files to the other drive?

  • Ummm 1 drive, 15TB? Is it a raid or did you mean GB?
    – NoahL
    Commented Apr 28, 2017 at 2:22
  • Is it built with MacOS's software raid tool? Can you repair the raid in any way? Is there a backup or parity (ie. Actual backup copy or raid: 1,5,6,10) or is it RAID 0?
    – NoahL
    Commented Apr 28, 2017 at 5:52
  • It is a promise raid drive, raid 5. How do I repair the raid?
    – erotsppa
    Commented Apr 28, 2017 at 15:33
  • Watch this tutorial. It's for the R6, but most of the steps will apply to any Promise RAID product
    – NoahL
    Commented Apr 28, 2017 at 15:37
  • What tutorial? ...
    – erotsppa
    Commented Apr 30, 2017 at 3:48


You must log in to answer this question.

Browse other questions tagged .