I think I recall a thread in which BCwipe was the only other product/method that had equivalent wiping capabilities (bad sectors, re-allocated sectors). So for other storage devices where ATA secure erase wouldn't work (External usb, laptop hard drives, etc) are there any other wipe methods that are equally effective as the ATA secure erase? (HDDerase and HDparm) Now since learning the Secure ATA command, I wanted to wipe out all my hard drives and now my laptop seems to be freezing the hard drive so I am wondering. The first hard drive probably didn't reset back because I had done 2-3 hdparms before I had let it finish on the last attempt. I also used the Linux command Katio suggested and was able to capture all the hard drive information which appears legitimate. If your drives not in a frozen security state, it works like a charm to invoke the ATA secure erase command. (This was actually a really fun and exciting thing to do, just doing a successful hdparm command and verifying the results) This command-line utility is an oldie, but thats just because it doesnt need to change. I then used Winhex to verify what appears to be an almost 100% complete wipe job as I saw pretty much nothing, except for 1 or 2 lines with a symbol or two. hdparm -user-master u -security-set-pass password. This time the security password resetted back to "not enabled." First, set a security password (required to wipe the drive).
I tried the hdparm command on another hard drive and the same output displayed. Enhanced secure erase writes predetermined data patterns (set by the manufacturer) to all user. Apple support stated a secure erase with APFS is significantly faster and what Im observing is a typical. Secure erase overwrites all user data areas with binary zeroes. hdparm -I /dev/sda Where /dev/sda is the drive you want to erase ofcourse. However: you do need to trust that the vendor has implemented this command, and that it was implemented correctly. In the past, it would take 4+ hours to complete a secure erase, formatted with HFS+. If you send a drive that command it will (secure) erase itself without the help of the operating system or software required to erase the drive. If the result is "frozen", it may be that the host's BIOS prohibits sending the ATA Security Erase command, which needs to find the BIOS to open this restriction.Searching, sorry for the late response but your advise was very helpful. When I attempt a 2-pass secure erase with 150GB internal volume used, its done in less than 30 seconds (option+cmd+r OR cmd+r > disk utility > erase).
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