Can a mac do a bitwise copy of a USB disk with proprietary disk format?

I have a USB disk with a propietary format that I want to bitwise clone to a new identical drive. So, not Mac HFS, FAT nor NTFS, some strange file system.

I have CCC but the disk doesn't show up in Finder.

It does appear in Disk Utility, but I don't want to erase and reformat.

I tried Terminal command of "mount" and do not see a device that might be it, so the dd command isn't an option unless I get the diskN number.

Any ideas?

Can it be done on a Windows or Linux machine?

Thanks for any help, -deac

 

From Deac

I access the disk with another device, not a computer, that has its own proprietary format.

Disk Utility does see the disk as it's a normal USB ESATA hard disk, but it has my data so I don't want to erase and reformat.

It does not show up in Finder nor CCC since it's not Mac HFS, FAT, nor NTFS.

I just want a way, possibly a set of Terminal commands, to do a bitwise copy to an identical disk. I thought of dd, but "mount" doesn't show it either. Is there perhaps another command that can show the device and let me mount it?

thanks,
-deac

 

Looks like dd may work after all

Thanks for the response. Since the device does show in Disk Utility, it seemed that I may be able to access it though it's not a supported file system.

A bit more digging turned up that the terminal command "diskutil list" does in fact show the device, /dev/disk4, designation needed for dd. I must now buy
the identical disk to clone to in order to try it.

Do you have a feel that this is likely to work?

Thanks again,
-deac

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Good plan, if my attempt at dd fails I'll try the image approach. Disk Utility can see the source disk and create a dmg file which can then be seen by CCC.

Thanks much,
-deac