Q: "Unable to write to the last block of the device"
Trying to format an external hard drive using diskutil gives me "Error: -69760: Unable to write to the last block of the device".
Is that a hardware problem and what could be done about it?
Disk Utility, Mac OS X (10.7)
Posted on Jul 30, 2011 6:08 PM
by neu242,Solvedanswer
I just had the same problem with an external USB disk that I tried to repartition. No matter what I did (using diskutil and dd in the Terminal, ...) I couldn't get rid of the error.
But then I plugged it into a Linux box and partitioned it there without any problems.
When I plugged the disk back into the Mac, I could format the linux-created partition with Journaled HFS+. Problem solved!
Posted on Nov 20, 2011 5:38 AM