![]() ![]() On master boot record (MBR) disks, only the MBR partitioning informationĪnd hidden sector information are overwritten. Zero, which completely deletes all data contained on the disk. ![]() Removes any and all partition or volume formatting from the disk withĪLL Specifies that each and every byte\sector on the disk is set to You can get the disk number by running list disk Hdparm -security-erase-enhanced NULL /dev/sdXĭiskpart can be used to zero out the whole diskĬhoose the disk you want to wipe (e.g. So, if your drive was manufactured roughly 10 years ago - it is already very likely to support this feature. Not only is it even faster than a run of dd (as it's already hardware based and hardware > software, speed wise), it is also more secure, due to the ability of purging original bad sectors that have been reallocated! There are 2 versions: the vanilla ( 2001 and onwards) and the enhanced one (post 2004). This functionality is integrated into the drive itself. However, there is something called secure erase. Or, if you want to measure progress: pv /dev/sdX So, one of the ultimate software ways (fast, reliable & secure), is a single run (zero-fill) of dd: dd if=/dev/zero of=/dev/sdX bs=1M However, one can only speculate what tech might be in the hands of, say, the NSA, so judge the provided information with that in mind. This is even more true for higher capacity models (higher density platters). The only way you can try to restore anything, after such an operation took place, is with an atomic-force microscope - this is, obviously, an extreme procedure, that will take months for even the smallest JPG file and the error rate (false-positives) is going to be immense (in other words - you won't get anything meaningful out of it). Generally, you do not need to do anything, but fill the drive with 0x00 (zero bytes / NUL) only once these days, in order to securely prevent the recovery of former data.ĭoing multiple passes is excessive and mostly useless, let alone filling the drive with random data. Well, using tools such as DBAN or the like is considered to be mostly pointless and also very time consuming. ![]()
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