A RAM drive (also called a RAM disk) is a block of random-access memory (primary storage or volatile memory) that a computer's software is treating as if the memory were a disk drive (secondary storage).

RAM drive software allows part of a computer 's RAM (memory) to be seen as if it were a disk drive, with volume name and, if supported by the operating system, drive letter.

Software can "partition" a portion of a computer's RAM, allowing it to act as a much faster hard drive that is called a RAM disk. A RAM disk loses the stored data when the computer is shut down, unless memory is arranged to have a standby battery source, or changes to the RAM disk are written out to a nonvolatile disk.

RAM disk 是将 RAM 模拟為 硬盘 的技术。 相对于传统的硬盘文件访问来说，这种技术可以大幅提高文件的访问速度。 但是RAM的易失性也意味着关闭电源后数据将会丢失。 某些时候这不是问题，比如说对于一个加密文档的明文来说。

RAMディスク （ラムディスク）は、 Random Access Memory （ランダムアクセスメモリ、RAM）による ストレージ である。 ディスクメディア ではないが、 ディスクドライブ を エミュレート することから「〜ディスク」と呼称される。

In Linux systems, initrd (initial ramdisk) is a scheme for loading a temporary root file system into memory, to be used as part of the Linux startup process. initrd and initramfs (from INIT ial RAM F ile S ystem) refer to two different methods of achieving this.

RAM disk 是將 RAM 模擬為 硬碟 的技術。 相對於傳統的硬碟檔案訪問來說，這種技術可以大幅提高檔案的訪問速度。 但是RAM的揮發性也意味著關閉電源後資料將會遺失。 某些時候這不是問題，比如說對於一個加密文件的明文來說。

RAM-диск (англ. RAM drive, досл.: «накопитель в памяти», «диск в памяти») — программная технология, позволяющая хранить данные в быстродействующей оперативной памяти как на блочном устройстве.

La locuzione RAM disk, (talvolta RAM drive), in informatica è usata per indicare una porzione di RAM, in un computer la memoria primaria, utilizzata da un software come se fosse un' unità a dischi, cioè una memoria secondaria.

This is a list of Linux distributions that can be run entirely from a computer's RAM, meaning that once the OS has been loaded to the RAM, the media it was loaded from can be completely removed, and the distribution will run the PC through the RAM only.