I went to the SCSI Trade Association on this a while back 'cause I never
did know for sure.  They said:  The SCSI controller negotiates the
protocol with each device and will talk to each in their native speed
(assuming the card can go that fast).  If devices need to talk to each
other they use the slower speed.

The only time any one device can change the bus speed is when a Single
Ended device is plugged into an LVD bus.

Charlie

PS  I got cheap and bought a Plextor 8x4x32x ATAPI CD-RW and it works
wonderfully.  I had to use a windoze box to do the firmware upgrade but
hey, I was burning CDs in a 486.


On Thu, 31 Aug 2000, Andrew Nemchenko wrote:

> SCSI is like a brain, it will only run as fast as your slowest device. So devices
> would slow down within the chain. I have multiple ports on my scsi card so I have my
> 68 pin IBM uw harddrive running off of one port and my 50 pin yamaha running off
> another so they are not in the same chain. Make sure that if you use a 68 > 50 pin
> addapter you set up your devices so that the CD burner is the last in the chain
> because it automatically terminates (at least mine does) or other wise you will have
> to get the adapter with the terminator on it.
> 
> "Troy A. Johnson" wrote:
> 
> > If the devices was on the same SCSI chain though, wouldn't a slow CD-ROM
> > (SCSI-wise, not CDROM-wise) slow down the whole chain?
> >
> > Nick.T.Reinking at supervalu.com wrote:
> > >
> > > I've heard really good things about Teac CD-Rs and CD-ROMs
> > > if you're trying to do weird things (overburn disks, bypass copy
> > > protection, copy PSX disks, etc.)
> > >
> > > As far as the UW thing goes, you should be able to get an
> > > 68pin->50pin connector for a Kenwood, and run it right up there
> > > with the rest of your UW devices.  ;P
> > >
> > > Nick Reinking
> > >
> > > dopp at acm.cs.umn.edu, on 08/31/2000 09:42:00 AM
> > > To: tclug-list at mn-linux.org @ PMDF
> > > cc:
> > > Subject: Re: [TCLUG:20885] CD BURNERS
> > >
> > > Yamaha's are very nice, as well.  Also, they have support for 512 byte
> > > blocks and support for the weird SGI scsi controllers.  Allowing you to,
> > > for example, make bootable copies of IRIX media on your Indy :)
> > >
> > > Gabe
> > >
> > > On Sun, Dec 31, 2000 at 09:26:20AM -0600, Andrew Nemchenko wrote:
> > > > YAMAHA!!!!! they have an nice large buffer so you will never have buffer
> > > underrun
> > > > problems when copying those music CDs.
> > > >
> > > > Jon Schewe wrote:
> > > >
> > > > > Plextor has always been a good brand.  I've got the PlexWriter RW 4/2/20 and
> > > > > it works great.  When it came time for firware upgrade on it they had a way
> > > to
> > > > > do it through Linux too.  Oh and don't consider anything except SCSI if you
> > > > > want to make sure it works in a multi-tasking environment.
> > > > >
> > > > > "Matthew LaBerge" <labmat at earthlink.net> writes:
> > > > >
> > > > > > I'm looking to get a new burner and would like some suggestions as to what
> > > > > > brand is the best or most reliable, my old 2x isn't performing as well as
> > > I
> > > > > > would like so it's about time to get a new one.  Any help is appreciated.
> > > > > >
> > > > > > ______________________
> > > > > >
> > > > > > Matthew LaBerge
> > > > > > labmat at earthlink.net
> > > > > >
> > > > > >
> > > > > >
> > > > > > ---------------------------------------------------------------------
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> > > > > --
> > > > > Jon Schewe | http://eggplant.mtu.net/~jpschewe
> > > > > For I am convinced that neither death nor life, neither angels
> > > > > nor demons, neither the present nor the future, nor any
> > > > > powers, neither height nor depth, nor anything else in all
> > > > > creation, will be able to separate us from the love of God that
> > > > > is in Christ Jesus our Lord. - Romans 8:38-39
> > > > >
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> > > --
> > > --------------------------------------------------------------------------------
> > > Gabe Turner                                    |           X-President,
> > > UNIX Systems Administrator,                    | Assoc. for Computing Machinery
> > > U of M Supercomputing Institute for            |    Univerisity of Minnesota
> > > Digital Simulation and Advanced Computation    |       dopp at acm.cs.umn.edu
> > >
> > > "I know everything there is to know about monkeys since I have seen
> > >  every Tarzan movie ever made!"
> > >                                 - Ren Hoek in "Monkey See, Monkey Don't"
> > > --------------------------------------------------------------------------------
> > >
> > > ---------------------------------------------------------------------
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> >
> > --
> > Troy Johnson   mailto:john1536 at tc.umn.edu   http://umn.edu/~john1536/
> > Where rights secured by the Constitution are involved, there can be no
> > rule making or legislation which would abrogate them.
> >         -- Miranda vs. Arizona, 384 US 436 p. 491
> >
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