[G4] Did I miss my bus?

[David Crandon]

Jeff,

The link is broken, could you cut and paste it or something?

David

jeff small wrote:
> 
> To clarify,  here is the question (phrased much more clearly) and the
> answer from Apple tech forums:
> 
> http://discussions.info.apple.com/WebX?12@23.uJ84a1w3ehL.4@.3bbd3c47/1
> 
>   Very educational (for me anyway):
> 
> I'm adding a WD SE 120 to my machine. I'm putting the original IBM 80
> on the ATA 66 bus, and the new drive on the ATA 100. My understanding
> up to this point has been that *all* drives should be set to cable
> select.
> 
> I just read a comment by Damien in another article stating that each
> drive should be set to master for optimum performance. Is this an
> official Apple recommendation? Is there one?
> 
> If I set both drives to master, should they be "master only" and then
> "master + slave" if I add additional drives to their respective
> busses later?
> 
> Thanks ahead of time
> jeff in seattle
> 
> Answered:
> 
> Hey Jeff,
> 
>   IDE only access' a single drive per channel at a time. Damien's
> point is that when you add a second drive it is best for performance
> to add that drive to the second channel as that channel's Master
> drive so that both drives on the computer can access concurrently. If
> both drives are installed as Master/Slave or Cable Select on the same
> channel/cable then they would alternate access and be half as fast
> when both are active.
> 
>   I personally prefer to set my drives with Master/Slave jumpers
> instead of leaving that to cable select. Cable Select is a method
> where the bus automatically sets Master/Slave. The end result is the
> same if everything is working but I feel comfortable setting them
> manually during the install.
> 
>   The two musts are that you choose which way you are going to go and
> stick with that not mixing the drives with one set Cable Select and
> the other set with a jumper to Master or Slave. And the end connector
> is always used for the Master Drive.
> 
>   The setup you are planning sounds exactly appropriate for best
> performance. Take your pick on whether to set your drives both as
> Master or as Cable Select and you'll most likely get the same result.
> (Damien was referring to the fact that a drive is still the Master
> drive if it is installed physically in the Master position on a cable
> no matter if the jumpers are set Cable Select)
> 
>   And yes, Apple did say that setting Master/Slave instead of Cable
> Select is an approved method. I choose to manually set it that way
> out of surety that it will work the way I want it to work.
> 
> Rick
> MacGurus.com
> 
> At 9:22 AM -0800 12/24/02, jeff small wrote:
> >Thanks for the reply.  The dual has *two* ATA busses, one ATA 100
> >and one ATA 66.
> >My new drive is a WD SE 120, btw.
> >
> >Thanks
> >jeff
> >
> >At 8:51 AM -0800 12/24/02, T. Brown / groucho wrote:
> >>On Tuesday, December 24, 2002, at 08:38  AM, jeff small wrote:
> >>
> >>>I'm installing an additional IDE drive in my dual 1ghz.  Does it
> >>>matter which bus it's installed on?  I thought I had read
> >>>somewhere that there was a protocol for adding drives; I can't
> >>>find any reference now.
> >>>
> >>
> >>It would be best to put it on the same buss as the original drive.
> >>There is a slight speed hit if you put it on the CD/DVD drive buss.
> >>I do have a drive in the atapi chain, but it is for MP3 / iTunes
> >>storage. The drive is a WD 80 gig special edition
> >>with an 8 meg cache. I notice no speed hit with it for that
> >>purpose. With other drives though, there was a noticeable
> >>difference.
> >>
> >>
> >>HTH,
> >>groucho
> >>
> 
> ----------
> G4ist, a listserv for discussion of everything G4.
> FAQ at <http://www.themacintoshguy.com/lists/G4.html>.
> Send a message to <G4-DIGEST at themacintoshguy.com> to switch to the digest.
> 
> XRouter | Share your DSL or cable modem between multiple computers!
> Dr. Bott | Now $139.99      <http://www.drbott.com/prod/xrouter.html>
> 
> Dr. Bott LLC   4-port USB Hub in translucent Graphite!
> Dr. Bott LLC   <http://www.drbott.com/prod/ghub.html>
> 
> Small Dog Electronics   http://www.smalldog.com  | Canon Digital Cameras |
> --Quicksilver & refurbished G4's arriving daily! |   and Camcorders!!    |
> 
> MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879!
> Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
> 
> OS X News, Dr.Mac, Forums, Tutorials, Tips, Hints, FAQ?s - http://www.osxfaq.com