Yes, there are some surprisingly strong magnets in the Hard Disk Drive. The read/write "head" also is an electromagnet, and the "platter" (spinning disk) is magnetized, but over all not very magnetic.
That is correct, hard drives use magnetic disks to record information; they use the polarity of the magnetic material to preserve a representation of binary data.
Yes! Data are stored within magnetic disks. So if any EMP has struck on your PC, it may destroy any magnetic parts of a PC such as Sector Zero and/or Hard disk.
240 hard drives, 20 floppy drives and 40 CD-ROM drives.
Permanant information is stored in hard drives, usb drives, cds, dvds and the temporary information is stored in RAM (Random Access Memory).
magnetic
One of the advantages of external hard drives is they are available in large capacities. Options are available for hard drives that have mass storing capability.
Magnets are not essential as part of the computing function itself, but many machines contain CD or similar drives, which are actuated by small motors. Which are magnetic in operation. And similarly for Hard drives, which use magnetic disks to store information. BUT -- But the imminent arrival of solid state drives, (Flash Memory of various sorts) may mean that there are no magnets in the computer. Excepting the loudspeaker which is likely to remain the magnetic type in the near future. [And excepting the transformers in the power supply.] P.S. Computer cooling fans also have magnets to be able to turn.
They store digital information in a relativly permenent form. Some hard drives called 'Hard Disc Drives' store data magnetically on a metal disc. Newer hard drives called 'Solid State Drives' store data electronically on flash memory.
To store information
They all store information.
If you are referring to RAM, none because it would slow it down. Hard drives and floppies are magnetically written to.
A Jazz drive is similar to a Zip drive. Jazz drives are external storage devices that use cartridges to store information on. With portable hard drives and flash drives available, the Jazz drives are obsolete.
240 hard drives, 20 floppy drives and 40 CD-ROM drives.
A magnet can only change information that is stored magnetically and if the magnet's magnetic field is strong enough. Memory sticks do not store information magnetically, they use Flash memory which stores information electrostatically. So no, a magnet can not erase information on a memory stick. Computers usually use hard disks which do store information magnetically, so in principle a magnet could erase information from a hard disk. However the magnet would have to be very strong (much stronger than is likely to be available at home) and held very close to the hard disk (probably be inside the computer case or even inside the hard disk case itself) to be able to to erase the information. Computers before the 1970s usually used magnetic core memory instead of DRAM as their main memory. While this stored information magnetically, the construction of the cores as rings made it impossible for any magnet to change the information: the 1 and 0 were opposite directions of magnetization around the ring shaped cores, while an external magnetic field is "linear" not "circular" and thus can't change the state of a core.
Computer disks (hard drives or older floppy drives) store their information by creating a magnetic charge on a tiny spot of the disk for each little bit of information, which can be read again later. Passing a strong magnetic field over the disk changes the saved charge and it can't be read again as organized information. CDs and DVDs don't store this way, so are safe from magnetic fields.
It can use either: real hard drives and virtual ones.
Flash-drives, or "thumb-drives"can hold digitized information, along with External hard drives and other things.
Widely used Magnetic platters Hard disk drives uses Properties of Magnetism. As known Data is stored in Binary form, the disk uses North/South Polarity created on Magnetic disk platter as 0 or 1 (binary digits). The sensor (Read/Write Head) in Hard disk senses magnetic orientation at a very small area and interprets it as Binary Digit.For storing data on Hard disk the magnetic orientations are changed according to data by Read/Write Head.
Yes there is a way.