BitRaser for File is a file erase or shredder utility that lets you schedule common tasks, e.g. “Internet Activities: Click this tab to erase internet traces of supported browsers.”.

A conventional hard disk, one with data stored on rotating platters, uses read/write heads that float on a cushion of air over the spinning platter(s). While the basic concept is similar to the grooves in a vinyl record, the write heads have a very slight bit of side to side play or wobble, so one *track* may be a bit to the left for example, while overwriting that *track* might be a bit to the right. In theory that portion of the track not overwritten could be read & its data retrieved. Erasing or shredding a file means overwriting that storage area on the platter(s) several times, based on the theory that by making several passes the write head will move all the way to the left, all the way to the right, and everywhere in between, completely overwriting any traces of old data.

While there are all sorts of standards – the ad copy mentions DOD for example – if you Google on disk shredding, it’s apparent not everyone is convinced erasing files is bulletproof. If you’re going to throw out an old hard drive, you can also find plenty of references online that talk about drilling several holes through the drive. And erasing or shredding is useless with SSDs or eMMC storage [eMMC is flash-based storage that’s cheaper than SSDs] – contact the manufacturer or research their docs or just Google based on the make & model of drive to find out how to remove all data, *if* it’s possible.

mike  –  5 years ago  –  このコメントは役に立ちましたか？ はい | いいえ (+7)

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