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Ch.13 Secondary Storage Devices - Coggle Diagram
Ch.13 Secondary Storage Devices
two types of storage device
main memory
RAM
volatile
versions:DDR3 SDRAM, DDR4 SDRAM and DDR5 SDRAM.
may be different in shape and may not fit in the slots on certain
motherboards.
ROM
non-volatile
stores is expected to be read-only and usually
cannot be rewritten.
stored in fireware:BIOS
secondary storage
common types
magnetic storage
solid-state stoage
optical storage
affect by access time, data transfer rate
capacity
KB,MB,GB,TB
access method
sequential access
direct access
redunant array of independent disks
network-attached storage
cloud storage