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Original CD-ROM drives could read data at about 150 kB/s, 1× constant angular velocity (CAV), [1] the same speed of compact disc players without buffering. As faster drives were released, the write speeds and read speeds for optical discs were multiplied by manufacturers, far exceeding the drive speeds originally released onto the market.
Flash memory is an electronic non-volatile computer memory storage medium that can be electrically erased and reprogrammed. The two main types of flash memory, NOR flash and NAND flash, are named for the NOR and NAND logic gates. Both use the same cell design, consisting of floating-gate MOSFETs. They differ at the circuit level depending on ...
A regular computer case may require/include [5] 7 thumb screw 6-32 × 6 mm for 2.5” drive tray, expansion slots; 4 hexagon screw 6-32 × 6 mm for psu; 21 phillips screw 6-32 × 5 mm for motherboard, 3.5” harddisk tray; 12 phillips screw M3 × 5 mm for 2.5” harddrive; 16 KB5 x 10 mm for fans; 9 standoff 6-32 × 6.5 + 4 mm for motherboard
When a computer needs to read information from the tertiary storage, it will first consult a catalog database to determine which tape or disc contains the information. Next, the computer will instruct a robotic arm to fetch the medium and place it in a drive. When the computer has finished reading the information, the robotic arm will return ...
USB flash drives draw power from the computer via the USB connection. Some devices combine the functionality of a portable media player with USB flash storage; they require a battery only when used to play music on the go.
Once the device has been plugged in it can be used to infect an entire network. One example of malware that propagates through removable media such as USB flash drives is Stuxnet, which caused significant damage to Iran's nuclear program. The risk from an attack like this can be reduced by automatically scanning media for malware and ...
NOR flash memory is sometimes called flash ROM or flash EEPROM when used as a replacement for older ROM types, but not in applications that take advantage of its ability to be modified quickly and frequently. By applying write protection, some types of reprogrammable ROMs may temporarily become read-only memory.
This is one major metric for cache performance measurement, because this number becomes highly significant and critical as processor speed increases. Another useful metric to test the performance is Power law of cache misses. It gives you the number of misses when you change the size of the cache, given that the number of misses for one of the ...