Comparison of HHDs and SSDs:
Have a longer read/write life
Don't need defragmenting
more shock proof than
HDDs(Hard disk drives)
Are the internal storage in PCs/laptops.
A HDD is made up of a stack of magnetised metal disks spinning.
Data is stored in small areas called sectors in the circular tracks.read write heads on a moving arm are used to access sectors on the disk.
Portable HDDs are used for backing up and transporting large amounts of data.
Even though HDDs have moving parts they are reliable and long lasting but can be broken if they're dropped.
HDDs are high capacity, reliable storage.
SSDs(Solid state drives)
SSDs have no moving parts.
Most SSDs use a type of flash memory.
same purpose as HDDs-for internal storage.
SSDs have a higher read/write time than HDDs.
SSDs are faster at booting up and opening programs and files.
SSDs can also be used to back up and transport data.
3 types of storage.
memory that the CPU can access very quickly.
Fastest read/write speed
Primary storage includes ROM, RAM, cache, CPU registers
volatile(temporary memory that requires power.
Where all data(operating systems, applications, files) is stored when its not in use.
Non-volatile(permanent memory that doesn't require memory)
slower read/write speed than primary storage
Secondary storage includes magnetic hard disc drives, solid state drives, CDs, SD cards.
used for storing data long term- archives and backups of massive amounts of data.
non-volatile(permanent memory that doesn't require power)
Tertiary storage include a magnetic tape library
HDDs = green
SSDs = yellow