Storage Media Flashcards
Magnetic Storage?
Magnetic HDD - a read/write head moves nanometres above the disk platter and uses the magnetic field of the platter to read/edit data.
HDD - Can be external connected through a USB port.
Obsolete = no longer used
Floppy Disk - replaced by SSD like USB sticks = faster + higher capacity.
Magnetic Tape - high storage capacity, but data has to be serial access (accessed in order), companies use to archive large amounts of data.
Magnetic storage A + D?
A - Large capacity + cheaper per gb than solid state. Relatively quick access speed but slower than ssd.
D - Not durable + not very portable when powered on, moving it can damage the device.
Optical Storage?
Optical - Uses laser to project beams of light on a spinning disc, allowing it to read data from CD, DVD or Blu-Ray.
Is the slowest of all 4 types.
Disc drives - traditionally internal, but external can be bought for laptops
Optical storage A + D?
A: Discs are thin + very portable
D: Low capacity (700MB-CD, 4.7GB-DVD, 25GB-BluRay). Not durable = discs are very fragile so can break or scratch easily. Have the SLOWEST access speed.
Solid state storage?
No moving parts.
Replacing magnetic HDDs because they’re Generally quieter, faster + use less power.
SSDs can be external.
USB flash drive = used to transport files easily due to its small size.
Memory cards = like SD card in digital camera, or Micro SD card in smartphone are examples of SSS.
SSS A + D?
A: High capacity but more expensive per gb than magnetic.
Durable but cheap USB sticks can snap/break.
Small size of USB sticks + memory card = portable can fit easily in bag/pocket.
FASTEST ACCESS SPEED because they have no moving parts.
Paper Storage?
Printed/handwritten documents/notes/forms/schedules.
Paper = relatively inexpensive.
Can take up a lot of space compared to small devices like USB stick.
Producing paper = environmentally damaging + requires physical security methods to keep safe.
Paper (timetable) can be written on if times change and easily carried on person. However paper (essay) must be re-printed to add changes.
Paper Storage A + D?
D: Low capacity = each page only hold certain amount of info. Paper takes up physical space.
Poor durability = easily tears + becomes damaged in the rain.
A: Portability = single sheets can be easily folded and contained.
D: Portability = large stacks of paper can be difficult + expensive to transport.
D: ACCESS SPEED IS SLOW, especially if the paper storage hasn’t been organised efficiently.
