Secondary Storage

Secondary Storage

1. Optical Storage

   • Optical discs are not vulnerable to data loss due to power failure like volatile memory
   • The biggest disadvantage of optical storage is disk capacity.
   • Most portable
   • Projector
   • ROM

2. Solid State

   • If you were measuring the cost per GB of space, the SSD is a lot more expensive than HDD
   • They're more durable. With traditional hard drives, the continuous motion generated by small moving parts creates heat, which is a leading factor in hard drive failure
   • This has the fastest Read-write speed
   • microprocessor chip
   • charge coupled device (CCD) image sensor used in cameras

3. Magnetic storage

   • One of the greatest things about magnetic disk storage is its ability to fit a tremendous amount of information into a small amount of space
   • if any area of the tape is damaged or broken, it can lead to the entire role being useless.
   • floppy disks
   • hard-disk drives
   • Has the biggest capacity of them all

4. Solid state vs magnetic

   • The platter inside the hard disk drive is coated with a magnetic media which records data in binary code (1's and 0's)
   • A solid state drive does not contain magnetic coatings. Instead, SSDs rely on an embedded processor, or "brain"
   • the maximum transfer rate typically ranges from about 200 MB/s to 3500 MB/s, depending on the drive
   • data transfer speeds are high (sustained 240MB/second for the T10000C and 160MB/second for the TS1130) compared to disk
   • Solid State has no moving parts. It is more durable than Magnetic
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