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Ch.13 Secondary Storage Devices - Coggle Diagram
Ch.13 Secondary Storage Devices
Main memory
Random access memory (RAM)
storage size and data access rate affect by CPU.
volatile
Read-only memory (ROM)
non-volatile
firmware
Basic input /output system (BIOS)
Secondary storage
Common type storage media
Magnetic storage (Magnetic tape)
Solid-state storage (SSD)
Optical storage (CD)
Speed affect by
Accesss time
Data transfer rate
Storage capacity
Kilobyte (KB)
Megabyte (MB)
Gigabyte (GB)
Terabyte (TB)
Type of access method
Sequential access
For backup data
Magnetic tape
Direct access
Platters
Depends on
Seek time
Drive rotation speed
Advantages
Fast
Durable
High-capacity
solid-state drive(SSD)
Advantages
Fast speed
Durable
Portable
Small in size
Hard disk
USB flash drive
Optical disks
(CDs/DVDs)
Redundant array of independent disks (RAID)
Improve
Error detection
Reduces the chance of data loss
Data transfer
Cloud storage
Network-attached storage
(NAS)
a file server with many drives
that are combined into a RAID
Memory Hierarchy
RAM
SSD
Cache in memory in a processor
Hard disk
Register
Magnetic tape