How much storage did CD (Compact Disc) have when it was released in 1982?

[Vivaldi]

How much storage did CD (Compact Disc) have when it was released in 1982?

I couldn't find it on Google.

[MrOracle]

The original Red Book standard from 1982 was 74 minutes/650 MB (during development, there were larger discs and also more densely-packed discs, but CD wasn't yet a released product). This was expanded to 80 minutes/700 MB by around 1986-87, as running into the earlier limitation was surprisingly common when double-LP albums were mastered on CD, and would have to delete a track or two. For example, the original release of Saturday Night Fever on CD had to delete a track to get under the 74 minute runtime - later releases restored the track.

This same pattern repeated itself once writeable CDs made it to the market: initially only 650 MB discs were available, but 3-4 years later, 700 MB discs were released.

[Astarlessnightsky]

600MB, if remember correctly later you had 700MB Clear CDs for burning, but these were able with finer laser precision..

But could also be you had 700 MB from the start.

[Vivaldi]

What is so strange is PC Hard Disc was like 10 MB back then.

Why was PC Hard Disc 10 MB but CD was 700 MB? When high storage was possible, how come PC Hard Disc was so low?

[Astarlessnightsky]

PC HDD is a magnetic medium, while CD uses laser technology.

Also HDD you can erase and rewrite over and over again. While CDs are only readable, at least until CD burner came around.

Also i cd technology had one major downside, which was reading speed. As it was mainly used for music it had a rather slow datatranfer rate, compared to HDD, and Console Cartridges like the one from the SNES.

[Vivaldi]

I see

[Vivaldi]

How about floppy disk? They have extremely low storage like 1.44 MB.

Could storage be deleted from floppy disk?

[madgoat]

1.44mb was the later 3.5" high density standard. Before that it was 720k.
And yes, you could write and read many times to this.
Nowadays, we all use usb sticks of course.

[Vivaldi]

@madgoat

But when CD was released in 1982. It had as high as 600 MB Storage. That is very interesting.

[Astarlessnightsky]

Floppy was also magnetic, before that we had cassetes, which used a magnetic strip, just like music cassetes.

CDs use a much smaller reading device, a laser which looks for tiny holes in the CD media, however as these holes take away some of the material its not reversable.

Later we got clear cds which were 4x rewritable, but you had to burn away a fraction of the silver layer.

HDD and the magnetic disc, never looses any mass, just the poles of the magnetic disc get changed, which isn't as precise but can be done rather quickly and indefinetely.

Vinyl as a medium older than cd and magnetic tapes has an infinte amount of storage space, as its an analogue medium.

[Vivaldi]

Early CDs also have only Audio record, right?

[Anonymous]

https://en.wikipedia.org/wiki/Compact_disc

[Vivaldi]

There is no way a CD was 700 MB in 1982.

That is not an answer.

[Vivaldi]

When a PC hard disck is 10 MB, can you imagine CD being 700 MB?

[Vivaldi]

Or was CD 700 MB when PC hard disc was 10 MB?