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Topic: 52x CDR drive becomes deadly weapon! (Read 6612 times) previous topic - next topic
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52x CDR drive becomes deadly weapon!

I happened across this article today... I'm not sure what to make of it!  I've never experienced anything even close to this:

CDR drive speed dangers!

52x CDR drive becomes deadly weapon!

Reply #1 –
Interesting. I've seen cd's breaking into pieces inside a cd-rom, but I never heard of shattered parts flying and killing people.

52x CDR drive becomes deadly weapon!

Reply #2 –
I was at a friends house a few months ago, eating toast downstairs, when, *suddenly, as if by magic*, there was a loud bang upstairs (I mean Grenade-gone-off loud)

Went upstairs and there were bits of CD and CD Rom drive ^everywhere^, embedded in the wall etc (he left some shards in for humour value).

Lucky I like toast 


====
Note that the CD in question was a 18pence "Indian" CDR...

52x CDR drive becomes deadly weapon!

Reply #3 –
 "I haven't experienced an exploding CD but did have my copy of Neverwinter Nights somehow levitate out of the CD holder and bury itself in the nether parts of my machine with a nasty metallic chunk," says Queensland PC user Neil Booth.

Huh... I've been told Neverwinter Nights kicks butt but this is ridiculous.
Anyway 
.:]CrAsH AnD LeARn[:.

52x CDR drive becomes deadly weapon!

Reply #4 –
aaah, my first quad-speed cd-drive loved to shoot at me, too... when I opened it, sometimes the cd was still spinning, and it was ---- fzzzt, a flying disk in my room... quite funny, but if it had been a 52 speed... I think I'd been death...

the quad speed "only" scratched some cd's
[span style=\'font-family:Arial\'][span style=\'color:red\']Life Sucks Deeply[/span][/span]

52x CDR drive becomes deadly weapon!

Reply #5 –
If I understand the article well, it assumes disk are torn apart due to the fast revolution speeds. Personally I have found another reason for causing big bangs (yes, I once experienced this myself    ). In my AOPEN CRW3248 (48x) it happens that a CD start 'trembling' during revolution, and if it becomes too much of a 'dance' there is a huge BANG 

52x CDR drive becomes deadly weapon!

Reply #6 –
Seems "possible," then again somebody may have been watching the Hellraiser 3 movie just a little too much.

52x CDR drive becomes deadly weapon!

Reply #8 –
Quote
If I understand the article well, it assumes disk are torn apart due to the fast revolution speeds. Personally I have found another reason for causing big bangs (yes, I once experienced this myself  ;)   ). In my AOPEN CRW3248 (48x) it happens that a CD start 'trembling' during revolution, and if it becomes too much of a 'dance' there is a huge BANG  :ph34r:

Yes, that is exactly the point... CDs are made cheaply... nobody goes and tests every CD to make sure that it is perfectly balanced. They wobble quite a bit, and some discs are far worse. You can tell when your drive makes a loud buzzing noise instead of a low whirr. The faster the disc spins, the more it wobbles. If it spins fast enough, the disc is torn apart. The wobbling is a result of the disc's poor construction. Arguably, they could make CDs stronger to withstand faster rotation speeds, but then you would only be able to use brand new discs in new drives, so it would be pointless.

52x CDR drive becomes deadly weapon!

Reply #9 –
Quote
No CD can stand a speed of 64x without exploding : http://temp.winglitch.com:81/articles/exploding_cd.htm

Pioneer 72x drives use three laser pickups and therefore spins at 24x.

Similiar to the keenwood 72x ? that uses one pickup who reads 5 tracks at once. ? I don think pioner has 3 picups but rather one pickup that reads 3 tracks or more.

what are the modle number of this dries as i have searhed for the kennwods 72x for yerars in scandinavia with no luck
Sven Bent - Denmark

52x CDR drive becomes deadly weapon!

Reply #10 –
Sorry, I meant Kenwood, not Pioneer.

The material of which CDs are made of is not stone rigid... I wonder if the central hole doesn't expand as the spinning speed increases. A tiny bit would be enough to dangerously off center the CD.

52x CDR drive becomes deadly weapon!

Reply #11 –
I have seen CDs with the hole in the center that was rather egg shaped. that puppy would cause things to shake somewhat. It was a blank Memorex CD, needless to say it was tough to burn anything on. It was far enough out of round to plainly see the flaw from a distance. I have had Memorex CDs that couldn't be written to, balanced or not. The burner wouldn't make it past the laser power calibration phase, it would just spit the cd back out after 10 seconds. Needless to say I don't buy anything made by Memorex anymore, thier stuff is shit. I had a Creative 40x that loved to spit out the CD while it was still spinning, did wonders for the CD. Wouldn't read a CD most of the time either. Finally on day I took it out, and while wearing work boots proceeded to flatten the basturd. Well, I felt better anyway. Bought a Plextor after that, haven't looked back since.

Exploding CDs put a whole new meaning to "UFO".

52x CDR drive becomes deadly weapon!

Reply #12 –
Quote
Quote
If I understand the article well, it assumes disk are torn apart due to the fast revolution speeds. Personally I have found another reason for causing big bangs (yes, I once experienced this myself     ). In my AOPEN CRW3248 (48x) it happens that a CD start 'trembling' during revolution, and if it becomes too much of a 'dance' there is a huge BANG  

Yes, that is exactly the point... CDs are made cheaply... nobody goes and tests every CD to make sure that it is perfectly balanced. They wobble quite a bit, and some discs are far worse. You can tell when your drive makes a loud buzzing noise instead of a low whirr. The faster the disc spins, the more it wobbles. If it spins fast enough, the disc is torn apart. The wobbling is a result of the disc's poor construction. Arguably, they could make CDs stronger to withstand faster rotation speeds, but then you would only be able to use brand new discs in new drives, so it would be pointless.

Oh I see. Thanks 

Striking is the huge 'wobbling' increase as soon as spin speed increases. It's really remarkable on my ltn403 and aopen crw3248 (even though the speeds do not differ that much: 48 vs. 40)

52x CDR drive becomes deadly weapon!

Reply #13 –
Quote
Interesting. I've seen cd's breaking into pieces inside a cd-rom, but I never heard of shattered parts flying and killing people.

A friend of mine ruined his comp coz of that shit.

scratched cds and his lg cdrom ... BOOM.

he said that he heard a noise of something explode and small pieces everywhere.. he had to open his case to clean the shit .

52x CDR drive becomes deadly weapon!

Reply #14 –
damn, anybody of you has good pics or a video of that???

52x CDR drive becomes deadly weapon!

Reply #15 –
 I didn't think cheap clipped pop noise was so dangerous  .

52x CDR drive becomes deadly weapon!

Reply #16 –
ive seen crappy cd players wobling the cdm but at 1x it isnt that danegrous 

52x CDR drive becomes deadly weapon!

Reply #17 –
My old Philips drive was a bit temperamental, one day it jammed with the disc still spinning, wouldn't open the drawer so I stuck a needle into the 'eject' hole for jammed discs. It opened the draw with an angry disc whirling like mad and flew up and out and attacked my finger cutting down to the knuckle bone.
And to top it all of the disc was knackered 

52x CDR drive becomes deadly weapon!

Reply #18 –
Quote
{...} one day it jammed with the disc still spinning, wouldn't open the drawer so I stuck a needle into the 'eject' hole for jammed discs {...}

The eject hole is designed to be used when the unit is powered off.

52x CDR drive becomes deadly weapon!

Reply #19 –
But I couldn't power off as I was d/l a very big file at the time,plus stupidity and beer played a factor 

But thanks for the lesson Sir 





edit: typo's

52x CDR drive becomes deadly weapon!

Reply #20 –
52x = disc spinning at 150mph = dangerous
let that be a lesson
[span style=\'font-size:8pt;line-height:100%\']"We will restore chaos"-Bush on Iraq[/span]

52x CDR drive becomes deadly weapon!

Reply #21 –
200 m/s = about 450 mph

52x CDR drive becomes deadly weapon!

Reply #22 –
why don't they just make cd's and dvd's stronger?  like, imbed micro metal wires in them or something.  *shrug*

52x CDR drive becomes deadly weapon!

Reply #23 –
..imagine when 200x drives will be available, all the shards of metal flying faster than rifle bullets out of the drive 

52x CDR drive becomes deadly weapon!

Reply #24 –
Quote
..imagine when 200x drives will be available, all the shards of metal flying faster than rifle bullets out of the drive 

I read somewhere that the maximum speed is almost reached, because centrifugal forces become uncontrollable at some point.