Change write permissions on internal HD outside of OS

I have a late 2009 iMac with a 1TB internal HD. I am unable to boot the OS however when running disk utility, through target boot and booting into an external HD, I am unable to repair, erase, partition or restore the internal drive. When selecting the drive in Disk Utility the write status is 'read only' which is what I assume is preventing me from repairing the the hard drive.

Without having access to the GUI, is there a way to change the permissions on my hard drive to read/write?

Also I am able to run a windows partition via Boot Camp on the same drive with no issues so I am assuming the drive didn't fail.