Transferred data at a rate of 150 kbs drive speeds

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Transferred data at a rate of 150 KB/s Drive speeds are measured as multiples of this original speed. To calculate an estimate of your CD-ROM drives transfer rate, multiply its speed by 150 kilobyte (1x = 150 KB/s, 2x drive = 300 KB/s, 4x drive = 600
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KB/s, 72x = 10,800 KB/s). CD-RW stands for Compact Disc-ReWritable. CD-RW can be written, read many times, erased, and rewritten. CD-RW has a capacity of about 650 megabytes. CD-RW is a removable hard drive, because you can insert the disc into the disc drive on one PC, add and delete data, eject it, and insert it into another disc drive on another system and have all your data immediately accessible. CD-RW drives can burn or write to CD-RW discs, erase CD-RW discs, and read a CD-ROM disc. CD-RW drive speed rating includes three parameters for a write speed, a rewrite speed, and a CD-RW read speed. All of these are multiples of the original 150 KB/s 1x speed defined by the first CD-ROM drives. For example, if you have an 8x4x32 CD-RW drive, this means that it can write at 1,200 KB/s, it can rewrite to a CD-RW disk at 600 KB/s, and it can read at 4,800 KB/s. The bottom surface of a CD-RW drive is coated with a photo reactive crystalline coating. A red laser causes a crystal to form which creates the reflective and non-reflective areas on the bottom of the DVD-RW disc. A CD-RW drive has a second, high power write laser. When this laser hits the bottom of this photo reactive material on the bottom of the CD-RW disk, it causes crystals to form. This is called phase shifting or a phase shifting media. Wherever a crystal is formed on the bottom of a CD-RW disk is like a LAND on a CD-ROM disk, because it reflects light. Digital Versatile Disc (DVD) DVD (Digital Versatile Disc) is an optical media standard that can be used to store large amounts of different types of data (computer data, video, audio). Most DVD drives can read and write. Older drives or older DVD players might only support DVD-R. A DVD with a single side of data can hold about 4.7 GB. A DVD-ROM is read-only memory. DVD-RW is a rewritable DVD format. DVD-RW uses a crystal encoding on the bottom of the DVD disc. Some DVDs can store data in two different layers on the same side. o The outer layer is semi-transparent, allowing the laser to read data from the inner layer. o Dual-layer discs can hold up to 8.5 GB of data. o Dual-layer recordable discs cost more than single layer discs. o Dual-layer DVDs are recorded using Opposite Track Path (OTP). o Most newer drives can read both single and dual layer discs. However, older drives might not support dual layer discs. DVD speeds use a multiple of 1.35 MB/s (1x = 1.35 MB/s, 2x = 2.7 MB/s, etc.) or 11 Mbits/s (1x = 11 Mbits/s, 2x = 22 Mbits/s, etc.). Blu-ray Disc (BD) Blu-ray Disc (BD) is a newer optical disc format that is capable of greater storage capacity than DVDs.
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