[gshodg]

perhaps /dev/rdisk1 is the wrong device.

Or you need to be an admin user (what we call the root user in unix/linux, not sure about OSX although it is fundamentally unix underneath)

what does

Code:

diskutil disk

output?

If it's admin user, I don't know what to do to login as root - I'm just at the level of following the wiki, running the script and following step-by-step, but don't know much beyond that. I did what you said, and it came back with this:

0101481ss-MBPownloads 0101481s$ diskutil disk1
diskutil: did not recognize verb "disk1"; type "diskutil" for a list
0101481ss-MBPownloads 0101481s$ diskutil
Disk Utility Tool
Utility to manage local disks and volumes
Most options require root access to the device

Usage: diskutil [quiet] <verb> <options>, where <verb> is as follows:

list (List the partitions of a disk)
info[rmation] (Get information on a specific disk or partition)
listFilesystems (List file systems available for formatting)
activity (Continuous log of system-wide disk arbitration)

u[n]mount (Unmount a single volume)
unmountDisk (Unmount an entire disk (all volumes))
eject (Eject a disk)
mount (Mount a single volume)
mountDisk (Mount an entire disk (all mountable volumes))

enableJournal (Enable HFS+ journaling on a mounted HFS+ volume)
disableJournal (Disable HFS+ journaling on a mounted HFS+ volume)
moveJournal (Move the HFS+ journal onto another volume)
enableOwnership (Treat as exact User/Group IDs for a mounted volume)
disableOwnership (Ignore on-disk User/Group IDs for a mounted volume)

rename[Volume] (Rename a volume)

verifyVolume (Verify the file system data structures of a volume)
repairVolume (Repair the file system data structures of a volume)

verifyDisk (Verify the components of a partition map of a disk)
repairDisk (Repair the components of a partition map of a disk)

verifyPermissions (Verify the permissions of a Mac OS X volume)
repairPermissions (Repair the permissions of a Mac OS X volume)

eraseDisk (Erase an existing disk, removing all volumes)
eraseVolume (Erase an existing volume)
reformat (Erase an existing volume with same name and type)
eraseOptical (Erase optical media (CD/RW, DVD/RW, etc.))
zeroDisk (Erase a disk, writing zeros to the media)
randomDisk (Erase a disk, writing random data to the media)
secureErase (Securely erase a disk or freespace on a volume)

partitionDisk ((re)Partition a disk, removing all volumes)
resizeVolume (Resize a volume, increasing or decreasing its size)
splitPartition (Split an existing partition into two or more)
mergePartitions (Combine two or more existing partitions into one)

appleRAID <verb> (Perform additional verbs related to AppleRAID)
coreStorage <verb> (Perform additional verbs related to CoreStorage)

diskutil <verb> with no options will provide help on that verb