CGS2060 Exam 2 ch6 vocab part 2
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20 terms
Terms | Definitions |
|---|---|
 hard drive | a device that holds all permanently stored programs and data; can be located inside the system unit or attached to the system unit via USB port |
| hard drive | has the largest storage capacity of any storage device and more economical than other storage options because it offers the most gigabytes of storage per dollar |
| access time | the time it takes a storage device to locate its stored data and make it available for processing |
| milliseconds | hard drive access times are faster than that of other permanent storage devices, like optical drives, and are measured in __________. |
| solid state drive | SSD |
| SSD | abrev. for drives that use run with no noise, little heat, require little power, and have the same kind of memory as flash drives, but where flash drives have access times of about 1 ms, these drives can reach data in only a tenth of that time |
| data transfer rate | speed at which a hard drive can transfer data to other computer components (such as RAM) |
| data transfer rate | depending on the manufacturer it is expressed in either megabits or megabytes per second |
| platter | a hard drive is composed of several coated round, thin plates of metal stacked on a spindle. Each plate is called a ________. |
| Serial Advanced Technology Attachment | SATA |
| SATA | abrev. for hard drives that use much thinner cables and can transfer data more quickly than IDE drives, good for "power users" (graphic designers, software developers) |
| Integrated Drive Electronics | IDE |
| IDE | abrev. for older style hard drives that use wide cables to connect the hard drive to the motherboard |
| parallel advanced technology attachment | PATA |
| PATA | abrev. for another name for Integrated Drive Electronics |
| redundant array of independent disks | RAID |
| RAID technology | a set of strategies for using more than one drive in a system |
| RAID 0 | every time data is written to a hard drive it is actually spread across 2 physical hard drives, twice as fast as one hard drive, but if either fail loose all data |
| RAID 1 | all data written to one drive is mirrored and written to a second drive, instant by instant backup of all work, but if buy 2 1TB drives you only have room for 1 TB of data because 2nd is a mirror |
| Sony Vaio Z | a notebook available with two 256 GB SSDs, connected in RAID 0. this allows access to 500 GB of storage & fast access speeds with little power consumption or noise |
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