why CDROM operations cause system to be slow and HD operations do not

[Ivailo Tanusheff]

I think that if your CDROM drive or CD is bad or you have dust on the lens 
of CDROM drive the system will try to correct the problem by making 
several reads on the same sector of the CDROM. So this takes system time 
and the whole system goes slower. Try different CDROM drive or different 
CD - this could solve your problem :)

Ivailo Tanusheff





Yuri <yuri at tsoft.com> 
Sent by: owner-freebsd-questions at freebsd.org
07/13/2005 10:54 AM

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freebsd-questions at freebsd.org
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Subject
why CDROM operations cause system to be slow and HD operations do not






When I read something from CDROM my system gets visibly slow and HD 
reads/writes do not have the same effect.

I think they both should have similar effect on system performance since 
multiple requests should just wait till completion interrupt and other 
processes shouldn't be affected.


Yuri
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