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I try to backup my files of a corrupt system. I can start into the single user mode and want so store my home folder to my backup system. To mount my usb drive I need to mount the root disk as writeable. Therefor I used the command

/sbin/mount -uw /

The command will be executed withoud any response, after that I tried to create a folder

mkdir /backup

But this returns

mkdir:backup: File exists

But there is no folder or file which has been created??? What am I doing wrong? Thanks

3

Single user mode is the wrong tool for this job. Connect an external drive if you want to use one and then restart in to Recovery HD ( or Internet recovery).

Use the terminal application from there to make your copies and backups. It's handles mounting all the filesystems properly so you can move things around.

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