... bulk deletion and demagnetization (Disk Demagnetizer) Disk Eraser General Description 1, This ordinary type disk demagnetizer (also called ... or destroy all information stored on hard drive, floppy disk, magnetic tape, magnetic card, CD, cassette etc. ... Technical Parameter:Applicable mediumHD(=400GB), Magnetic tape, floppy disk, magnetic card, CD, cassette etc.Demagnetizing time30s~50sEnvironmental ...