🗄️ Storing data

How is data stored?

On premises

Hard Drives

• SSD
• HDD
  • Storing on a single HDD or SSD can be risky
  • No backup
  • You have to have the drive with you at all times to use it

Portable storage devices

• Flash drive
• CD
• DVD
• Portable SSD
• SD card
  • You have to take it around with you
  • Not ideal for a large business who collaborate

File servers

• NAS
  • Can be accessed by anyone on a network
  • Easily accessible
  • Connects through a network, instead of directly into a computer
  • If power supply fails, no access.
• SAN
  • Storage area network
  • Used in enterprises (expensive)
  • High speed, low latecy
  • If a single disc fails, the SAN continues
  • Robust
  • Appears as a single drive
  • Linked using fibre optics
  • Block based storage
    • A physical record