136 Views 2 Replies Latest reply: Jan 10, 2013 11:33 AM by Cosmonut
I've had problems with my mid 2012 i7 8GB MacBook Pro for several months, stuttering sound and video, beachballing, slow boot up and shutdown times most of which I assumed to be down to OSX issues.
I reinstalled Mountain Lion on several occasions but to no avail.
At the weekend I decided to do a clean install back to Lion, using Internet Recovery, because it was taking over 5 minutes to get tot the log in screen. My problem is that Disk Utility does not erase the drive. Three times I have tired to erase the internal Toshiba 750 GB drive, using security option 'write to zeros'. On each attempt the erase stalls with c. 12 minutes to go and hangs for several hours, ending on an error message: secure disk erase failed with the error 'securely erasing data to prevent recovery failed'.
I note that the SMART status says 'Not Supported' but verifying disk shows no error.
Is this evidence of a failing or failed disk? Should I take it back to the Apple Shop or proceed with the Lion install?
Thanks in advance for your help.