CD Writers can use either CDR or CDRW a rewritable media in the same way as DVD Writers the CDR disks can only be written or burnt once. The RW version allows for many writes or burns to be made by re-using the same disk.
CD Writers started at low speeds and are unlikely to exceed the 52x/56x speeds as the drives and media would not be able to work at higher speeds. Copying data to a CD takes just a couple of minutes and can then be used in almost all players instantly.
All burners come with built in buffers which allows you to do one or two tasks such as collecting email or writing a document, whilst writing to the disk. A buffer is similar to the anti-shock feature built into walkmans.
Speeds are written as 40 x 16 x 40 which means it has a 40x speed write, 16 x speeds re-write, and a 40x read function. The read function is exactly the same as normal CD/DVD Rom drives, the write speed is used when writing to CDs or DVD and the re-write is used only with re-writeable CD or DVD media.
IDE connection is still the most popular connection method as it is a PC standard. Other connecting options include external USB 2.0 or FireWire units.
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