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CD-ROM drives are rated with a speed factor relative to music CDs. If a CD-ROM is read at the same rotational speed as an audio CD, the data transfer rate is 150 Kbyte/s, commonly called "1×" (with constant linear velocity, short "CLV"). At this data rate, the track moves along under the laser spot at about 1.2 m/s.
CDemu is a free and open-source virtual drive software, designed to emulate an optical drive and optical disc (including CD-ROMs and DVD-ROMs) on the Linux operating system.. As of 30 June 2019, CDemu is not available in the official repositories of Debian, Ubuntu and Fedora Linux for any release, but it is available via official PPA for Ubuntu and COPR for Fedora Linux.
An early portable player, a Sony Discman model D-121. A portable CD player is a portable audio player used to play compact discs. Portable CD players are powered by batteries and they have a 1/8" headphone jack into which the user plugs a pair of headphones. The first portable CD player released was the D-50 by Sony. [58]
A Sony D-V500 portable video CD player from 1996. Note that it does not bear the Discman brand. Video CD Discman, later rebranded as VCD Walkman, was a line of portable Video CD players. They were able to output the audio from video CDs as usual, but were also equipped with an additional 3.5mm audio/video-to-RCA connector output. [5] [6] [7]
The CF-V21P by Panasonic was the first laptop on the market with an integrated CD-ROM drive as an option. However, it only supports up to 3.5-inch-diameter mini CDs instead of standard 4.7-inch-diameter discs. It was released in October 1993. [3] [4]: 111
For the first few years of its existence, the CD was a medium used purely for audio. In 1988, the Yellow Book CD-ROM standard was established by Sony and Philips, which defined a non-volatile optical data computer data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive.
The CD-ROM format was developed by Sony and Denon, introduced in 1984, as an extension of Compact Disc Digital Audio and adapted to hold any form of digital data. The CD-ROM format has a storage capacity of 650 MB. Also in 1984, Sony introduced a LaserDisc data storage format, with a larger data capacity of 3.28 GB. [59]
USB flash drives [5] Portable storage devices. Dedicated external solid-state drives (SSD) Enclosured mass storage drives, i.e. modified hard disk drives (HDD)/internal SSDs; Peripheral devices that have integrated data storage capability Digital cameras; Mobile devices such as smartphones, tablets and handheld game consoles; Portable media players
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