rallee2{at}comcast.net wrote:

>Hello
>  Sorry if I am sufferring from a brain cramp but whoever said that
especially on SCSI any one drive, even a CDROM, would affect the
performance of another? Isn't that one of the long held values of SCSI?  If
I am correct in this, that is a pretty severe indictment of the quality of
support they have regarding SCSI in general for *any* OS and simply
underlines how so-called tech-support personnel suffer from softness in the
brain whenever they're faced with an alternative OS.  I feel for ya Daniel.
>Jimmy 
>  
>
The issuse is that the CDROM device will limit the MAX speed of the SCSI 
buss. When the buss powers up, the host adapter asks each device on the 
chain to respond at the the fastest data rate that the adapter can 
support. As each device respnds, the host adapter rackets down the max 
data rate to match the slowest devices on the buss.

What the LSI tech rep was saying is TRUE. Putting a 5-10MBS CD-ROM on a 
SCSI buss with a 40MBS HDD makes the 40MBS HDD have the SAME thruput as 
the CD-ROM, Hence the suggestion to put the CD on a separate SCSI chain 
so that the data rate from the HDD speeds up.



-- 
Robert Gammon   
Houston, TX




------------------------ Yahoo! Groups Sponsor --------------------~--> 
Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page
http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/9rHolB/TM
--------------------------------------------------------------------~-> 

 
Yahoo! Groups Links

 To visit your group on the web, go to:
    http://groups.yahoo.com/group/os2hardware/

 To unsubscribe from this group, send an email to:
    os2hardware-unsubscribe{at}yahoogroups.com

 Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/
 





---