Chapter 3 Storage terms Flashcards
The two parts storage systems involve
Storage device (DVD drive) Storage medium (DVD disc)
Access that allows a computer system to retrieve records only in the same order in which they are physically stored
Sequential access
Access that allows the system to retrieve records in any order
Random access (direct access)
Files given a filename and organized into folders
Logical file representation
Refers to how files are physically stored on the storage medium
Physical file representation
Used in most computers to store programs and data
Hard drives
Drive that uses magnetic disks to store data
Magnetic hard drives
Uses flash memory to store data
Soils-state drive (SSD)
Drive that uses a combination of magnetic disks and flash memory
Hybrid hard drive
Metal disks are organized into concentric
Tracks
Boundaries that divide a magnetic disk surface into pie pieces
Sector boundaries
All tracks in the same position on all surfaces of all disks in a hard drive form a
Cylinder
The total time it takes for a hard drive to read from or write to disks is called
Disk access time
The process of transferring data to memory whenever disk content is retrieved
Disk caching (speeds up access time)
CD discs, DVD discs, and Blu-ray Discs store data
Optically (optical discs)
Optical discs are read by
Optical drives
Discs that already come with the data stored on the disc are called
CD-ROM/DVD-Rom/BD-Rom discs
CD-R, DV-R, BD-r discs are
Recordable Discs
CD-RW, DVD-RW, BD-BD-RW discs are
Rewritable disks
Rewritable discs typically use what to temporarily change the reflectivity of the disk to represent 1s and 0s
Phase change technology
One of the most common types of flash memory media are
Flash memory cards ( most common type Secure Digital (SD)
Convenient way to transfer files via USB port
USB flash drive
NAS stands for
Network attached storage
SAN stands for
Storage data network
