Restoring CF card on MacOS

Dradd · 14 April 2021, 17:58

Hello folks,

I have recently backup my Amiga's internal CF card to my Mac.

I used the following code in Terminal to do so:

Code:

sudo dd if=/dev/rdisk3 of=originalbackup.hdf bs=8m

Now I have a new blank CF card that I want to clone the backup to, and I can't see a way to do it under MacOS/Terminal (my linux isn't that strong).

Essentially I want to take the 'originalbackup.hdf' file and just put it on a new clean CF card so I can use it in the Amiga.
Sadly when I insert the CF card into my Mac, it's recognised by Finder as a FAT formatted device, so when I try the following code to 'copy' the hdf file to it...

Code:

sudo dd if=originalbackup.hdf of=/dev/rdisk3 bs=8m

... it tells me the Resource is busy.

So how do I do this?
Any help will be appreciated.

Many thanks
Keith

Dradd · 14 April 2021, 18:41

... Update...

I found out how to do this... you need to unmount the disk you are copying to, like this:

Code:

diskutil unmountDisk disk3

... where 'disk3' is the disk you are writing to.

Problem solved, original CF card cloned and all working fine.

jbenam · 15 April 2021, 18:46

While I haven't tried writing an Amiga HDF back to a real card on a Mac, I suspect it should work pretty well with Balena Etcher - the Mac equivalent to win32diskimager. I have used it in the past for bootable USB drives and microSD (Raspberry Pi) cards.

While dd is awesome, sometimes you just want to use a graphical GUI

Give it a whirl next time and please report back if it works: https://www.balena.io/etcher

14 April 2021, 17:58	#1
Dradd Registered User Join Date: Jun 2020 Location: Andover/Hampshire Posts: 46	Restoring CF card on MacOS Hello folks, I have recently backup my Amiga's internal CF card to my Mac. I used the following code in Terminal to do so: Code: sudo dd if=/dev/rdisk3 of=originalbackup.hdf bs=8m Now I have a new blank CF card that I want to clone the backup to, and I can't see a way to do it under MacOS/Terminal (my linux isn't that strong). Essentially I want to take the 'originalbackup.hdf' file and just put it on a new clean CF card so I can use it in the Amiga. Sadly when I insert the CF card into my Mac, it's recognised by Finder as a FAT formatted device, so when I try the following code to 'copy' the hdf file to it... Code: sudo dd if=originalbackup.hdf of=/dev/rdisk3 bs=8m ... it tells me the Resource is busy. So how do I do this? Any help will be appreciated. Many thanks Keith

14 April 2021, 18:41	#2
Dradd Registered User Join Date: Jun 2020 Location: Andover/Hampshire Posts: 46	... Update... I found out how to do this... you need to unmount the disk you are copying to, like this: Code: diskutil unmountDisk disk3 ... where 'disk3' is the disk you are writing to. Problem solved, original CF card cloned and all working fine.

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15 April 2021, 18:46	#3
jbenam Italian Amiga Zealot Join Date: Jan 2009 Location: Italy Age: 36 Posts: 1,910	While I haven't tried writing an Amiga HDF back to a real card on a Mac, I suspect it should work pretty well with Balena Etcher - the Mac equivalent to win32diskimager. I have used it in the past for bootable USB drives and microSD (Raspberry Pi) cards. While dd is awesome, sometimes you just want to use a graphical GUI Give it a whirl next time and please report back if it works: https://www.balena.io/etcher

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