I purchased an internal Pioneer Blu-Ray burner for my Mac Pro, downloaded a copy of MakeMKV and the latest Handbrake. I could have settled for just a Blu-Ray reader, but c’mon now.
I was ripping to a WD Green drive, but MakeMKV yelled at me for having too slow of a disk, so I decided to have it write to a WD Black drive — no more complaints.
Each movie from my collection took around 90 minutes to rip to MKV. I pointed Handbrake to the first MKV file and waited another 50 minutes & it was an M4v. Open it in iTunes, set the genre & it was ready for playing via the AppleTV2.
Cars and Wall-E were my first ones & they came out great. My little girl loves them.
Caution – if you screw this up, you’ll lose everything.
OK, now that that’s out of the way — let’s say that I’ve determined that I’d like to run zeroes across the whitespace on my HDD weekly.
On my MacPro4,1, I’m running OS X 10.6.7 & found an easy way to do it. My account has Admin privileges, so there’s no ‘sudo’, or password required.
I didn’t want to dive into Apple Script, so I fired up SecureCRT and used the bash shell to whip up a simple command-line execution of the ‘diskutil’ app. So, without further ado, here’s the simple script (made u+x) in my home directory /Users/otech, called wipewhite.sh
diskutil secureErase freespace 0 /Volumes/Test_HDD
Yeah. Simple. Oh Yeah – note the word ‘freespace’ above – über important.
Then, I added it into CRON (crontab -e), to be run on Friday nights (or early AM) at 0300.
|0 3 * * 5 /Users/otech/wipewhite.sh
So, here’s the breakdown of the diskutil commands that I’ve selected:
diskutil <verb> <options>
‘secureErase’ – (verb) with (option) ‘freespace’ and (option) ‘0’ to the path of the Volume: /Volumes/Test_HDD (yours is different):
||Securely erase a disk or freespace on a volume
||Tells it to just erase the freespace on a volume, NOT the disk
||0 – Single-pass zeros
1 – Single-pass random numbers
2 – US DoD 7-pass secure erase
3 – Gutmann algorithm 35-pass secure erase
4 – US DoE 3-pass secure erase.
Now, yes – 0 is pretty weak and I could have selected one of the other options, but I didn’t. For a 750GB WD Black drive, it took somewhere around 3.5 hours. I wonder how long Level 2 will take.