DBAN notes

In case  blogspot disappears into the ether, here are some notes if you’re using Unetbootin and a USB key for DBAN in OS X or just happen to run into the “Could not find ramdisk image:/ubninit” error.

  1. If your machine is old you’ll likely need to turn off UEFI/EFI boot and put the BIOS into legacy USB Boot mode.
  2. In OS X using Disk Utility or Terminal wipe your USB key and reformat into a single partition with FAT32/MBR.
  3. Download DBAN’s latest .iso.
  4. Open Unetbootin on the Mac, choose the above .iso and hopefully your USB has mounted as /dev/disk2 or 3 or 4 or whatever to be set as the target destination.
  5. As taken from Stephen Greenhalgh’s DBAN USB Unetbootin Fix Post:

To fix this insert the USB drive back into a computer and open up “syslinux.cfg” in a text editor. Find and replace all occurrences “ubninit” with “ISOLINUX.BIN” and do the same with “ubnkern” with “DBAN.BZI”. Make sure that you match the case.

This worked for me using DBAN 2.3.0.

Reverting back to Mavericks

It’s unclear.  I did a fresh install of Yosemite on a Retina MacBook Pro 13″ 11,1 but the battery life was terrible.  Typically 4-5 hours max.  In order to revert to the “Out of Box” state you need to delete the primary Mac OS partition and then boot to recovery using CMD + Option + R.  This will initiate the “Internet Recovery” which will take hopefully less than an hour to download whatever OS the machine came with, in my case Mavericks.  Upon receipt of the machine I did a fresh install of Yosemite but consistently saw terrible battery life.  My hope was that it was Yosemite related, so I’ve reverted back to 10.9.4.

I’ve now performed an SMC reset and I see over 13:00 hours at 100% battery life under Mavericks.  It’s unclear if Yosemite is at fault, or the SMC is at fault, the clean install is at fault, I mean who the fuck knows Apple?  All I know is that I did a fresh install of Yosemite on a brand new machine and it got about 4 hours of battery life.  Now it says it has 13 hours of battery life.  Talk about a fucking unreliable narrator.