Permission denied message when mounting external drive in single user mode

Hello.

One day, my MacBook Air wouldn't boot up. After booting from the Install DVD and running disk utility, it said that there was a problem with the internal hard disk drive and that it needed to be reformatted and OS X reinstalled. 😡

I am now trying to backup some of my files onto a 1TB external hard disk drive using single user mode.

I have created the directory with the following command...
mkdir /Volumes/lacie

...and are trying to mount the drive with the following command...
/sbin/mount_hfs /dev/disk1s1 /Volumes/lacie

...however, it comes back with this message when I press return:
mount_hfs: Permission denied

Please can somebody help. 😕
Thanks,
Nigel Garside.

still no

mx12 said:

Try putting sudo before you command:

sudo /sbin/mount_hfs /dev/disk1s1 /Volumes/lacie

This makes the command execute as a super user.

Click to expand...

No. Sorry. Doesn't work. Same message.

Thanks for trying.