After I get my new iMac up and running, I'll be giving the Mac Pro to someone with a pristine system on it. I plan to zero out data on all four internal drives before doing so (I'm not paranoid enough to go for a 7-way or 35-way erase). I intend to boot from the Snow Leopard DVD and use Disk Utility for this purpose.

My question: Since this will take a long time, is it possible to erase all four disks simultaneously or do I have to do them separately? Also, I could use my existing boot drive's copy of DU to erase the other three and then use the DVD to erase the fourth. Would this be any faster than using the DVD for all?


Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365