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RAM drive - Definition |
| Related Words: Acceleration, Activity, Advance, Aggression, Alley, Alleyway, Ambition, Amperage, Angle, Animate, Appeal, Appliance |
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A RAM disk or RAMdrive is a segment of active computer memory, RAM, which is being used as secondary storage, typically a role for a disk drive. Access times are greatly improved, because RAM disks are approximately a thousand times faster than hard disk drives. However, durability of data through power loss is completely absent, because they are made of normal RAM. As a result, RAM disks lose their contents once the computer is turned off. RAM disks are great places to store temporary data or to hold uncompressed programs for short periods.
A proper disk cache in the operating system will usually obviate the performance motivation for a RAM disk; a disk cache fulfills a similar role (fast access to data that is notionally stored on a disk) without the various penalties (data loss in the event of power loss, static partitioning, etc.). RAM disks are, however, indispensable in situations in which a physical disk is not available.
Another way to use RAM to store files is the temporary filesystem. The difference between temporary filesystem and a RAM disk is that the RAM disk (/dev/ram0 etc.) is fixed-sized and acts like a disk partition, whereas the temporary filesystem (/dev/shm; in Source Mage GNU/Linux also /tmp) grows and shrinks to fit the files put on it.
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Example Usage of drive |
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Monie219: @Lifeofstephanie My mom knows what she is doing Shopping my weakness she always calls when she doesn't want to drive... |
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Brian_McGough: @TarikElBashir Difference being that people in Edmonton can probably drive in the snow and Edmonton probably shovels and salts/sands. |
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Samamma: And then it decides to just drive past because its full. |
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