Jul 1, Posts: America’s FHV here we come! CD-ROMs are identical in appearance to audio CDs , and data are stored and retrieved in a very similar manner only differing from audio CDs in the standards used to store the data. If so, this would help explain cd’s exploding. The quote is correct, but the interpretation is a bit off. Like audio CDs CD-DA , a CD-ROM sector contains 2, bytes of user data, composed of 98 frames, each consisting of bytes 24 bytes for the user data, 8 bytes for error correction, and 1 byte for the subcode. Problems with vibration, owing to limits on achievable symmetry and strength in mass-produced media, mean that CD-ROM drive speeds have not massively increased since the late s.

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Recordable CD-R and rewritable CD-RW discs are manufactured by a different method, whereby the data are recorded on them by a laser changing the properties of a dye or phase transition material in a process that is often referred to as ” burning “. See also History of optical storage media High-definition optical disc format war.

When that happens the drive will compensate by slowing down you might actually hear the drive change speedor attempting to re-read the data from the disk over and over until it works. Advertisements do not imply my endorsement of any product or service. Thu Jul 01, 5: Fri Jul 02, 1: But if you do, get a vid.


The ITS Connection Online: My CD-ROM is marked “52x.” What does that mean?

Until I found out the rotational sppeds, I couldn’t figure how a rotating mass on a flat plane would come apart. The faster you spin it, the harder the atoms try to fly apart – spin it hard enough and they’ll succeed.

If it isn’t in contact with the drive mechanism, or the disk was out of balance I have seen demonstrations of many discs exploding and blowing through the front bezel of drives when spinning at 10, RPM. The drive is virtually identical to other Samsung optical units, and comes with KB of buffer memory. Wed Jun 30, 4: Of course the disks aren’t in contact with the tray. By using this site, you agree to the Terms of Use and Privacy Policy. The computer was installing ’98 from the CD in the drive.

Note that both modes, like audio CDs, still benefit from the lower layers of error correction at the frame level. The file size of a disc image created in raw mode is always a multiple of 2, bytes the size of a block. Your explanation is the only one I have understood, lol!

CD and DVD writing speed

I hit eject on one unit, and it xdrom still spinning when the tray opened! They can also coexist with audio CD tracks as well, which is the case of mixed mode CDs.


You may also be interested in: To structure, 552x and protect this data, the CD-ROM standard further defines two sector modes, Mode 1 and Mode 2, which describe two different layouts for the data inside a sector. Would fast CDs with higher speed function well with data instead of audio, or do the same problems apply?

This article needs additional citations for verification. They suffer from high speed jitter and wobble more often and sooner than higher quality drives. The brain goes into sleep on your feet mode, and nothing comes out right.

Sat Jul 03, 3: Average disk speeds were the highest of all the reference drives at Retrieved October 24, Compact disc Rotating disc computer storage media Ecma standards Optical computer storage Optical computer storage media Rainbow Books Japanese inventions Video game distribution.

Spin them much faster, and the CDs stand a real chance of flying apart. This is converted into binary data. I still don’t think I’m getting what is a parallel to what.

Jul 9, Posts: Buy the best you can get, or slow it down. As a side note, DVD readers are also starting to use the “X” notation.