Does oxygen forensics work on ipods
To visualize what a track looks like, think about how track athletes run in circles around an oval track in certain lanes. To understand cylinders, you must look at the tracks on a hard drive. Every platter has two heads to be able to read/write both the top and bottom of the platter (see Figure 5.1). The read/write heads of a hard drive are the devices that can read or alter the magnetic signature on a hard drive. A typical hard drive usually has more than one platter, and data can be written to both the top and bottom of each platter. The platters are coated with a magnetic material of some type such as iron oxide that can be charged either negative or positive, which is how the 0s and ls are o'written" to the platters. To understand how the hardware works, you must understand the geometry of how drives store all those 0s and 1s.ĭrive-the shiny disks mentioned above-canĪluminum, ceramic, or even glass and are designed to spin at very high speeds.
No matter how closely you look, however, you will never see the 0s and 1s stored on those shiny platters because they are magnetically written and read. When you open a hard drive, you see shiny circular disks with read and write arms attached to a motor.
If you turn the hard drive over, you will see a circuit board (otherwise known as the hard drive controller) that controls how the information is stored, transferred, and buffered. IKeep in mind thot iby opening o hord ldrive, you destroy o I it, unless you ore I certified technicion. If you look at the top of a hard drive, you will usually see a nice shiny cover with a label affixed that supplies information on the hard drive's parameters. Looking at a hard drive extemally, you will notice that most standard hardĭrives are no larger than a small book, yet they can store encyclopedic amounts of data. For most users, this is enough information, but a forensic technician must understand the hardware components and how they work to save data. Most computer users are familiar with the idea of computer hard drives and how they are used to store computer programs and data. That the evidence collected was not altered or tainted in any way, and knowing how the technology works will help the forensic examiner understand how data