I have looked through the other questions here on AU, and none of them seem to help me deal with this particular problem, so I am starting a new question.
For some context, all I am trying to do is install the Ubuntu Rescue Remix image onto an external USB drive. I am currently running these commands on my iMac, according to the steps made available via the Ubuntu Rescue Remix instructions.
My problem is that even after I unmount [but not eject] the destination USB drive (assigned to /dev/disc4); I still get the Operation not supported
error, which (I think) is the error someone gets when trying to run a dd
operation on a mounted drive (or "Resource Busy" error).
So here is the command I run:
sudo dd if=ubuntu-rescue.img of=/dev/disc4 bs=1m
And here is the result I get:
dd: /dev/disc4: Operation not supported
The output I get from running diskutil list
:
... /dev/disk4 #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *8.3 GB disk4 1: DOS_FAT_32 8GBUSBFLASH 8.3 GB disk4s1
So can anyone help me understand why I can't seem to run the dd command on /dev/disc4, even after it has been unmounted, yet not ejected?
Thanks!
Update: Someone cited this answer as a potential solution to my question, so perhaps someone might find an answer there, but my question is unique, because it is asking in the context of dd
operations, and the errors resulting from my dd
operations --- the suggested answer doesn't talk about dd
operations at all, so it can't serve as an answer to my problem.
scsi
drive? Maybe you should try to use/dev/sdX
instead of/dev/disc4
?dd: /dev/sdx4: Operation not supported
, similar to the error I am already getting.sdx
withsdc
orsdd
in your case it should be/dev/sdd
and write it not tosdd4
but tosdd
Operation not supported