Adding and configuring a second hard drive in a Power Mac G4

I am using a Power Mac G4 with the original 20GB hard drive and running OS 9.2.2.
I would like to upgrade to 10.4 (Tiger) installing it on a 80 GB Seagate Ultra/ATA 100 which I need to install as a second hard drive.
This is where my problem arises. From what I have read I cannot install OS 10 on a drive configured as SLAVE. On top of this Apple article ID 106728 has a note not to “change your Apple –installed disc drive to ATA ID-1 (slave) when adding other ATA devices.”
Is this article correct or am I misunderstanding it? I was hoping I could just install the new drive on top of the original and switch the configurations of the drives making my original drive the SLAVE and the new drive MASTER and just install OS X on the new 80GB drive.
Or can I put the new drive in the position of my original drive configure it as MASTER and put my original 20GB drive above it and configure it as slave?
I am hoping someone can let me know if these configurations will work.
Another question is: If I switch the position of my original drive will I lose access to the data on it?
I would like to keep the OS systems on separate drives because I need to continue to run my old software and Heidelberg scanner (SCSI, running on LinoColor Elite 5.1 for which updated drivers are not available). This will not be possible in classic. I want OS X on the larger drive as I will be loading updated software eventually and it will become my main OS system.
Power Mac G4 450GH, 768mb ram (AGP graphics ) Mac OS X (10.4) Currently running 9.2 and will be upgrading to OS 10.4

Hi, Thelisa -
Welcome to Apple's Discussions.
Is this article correct or am I misunderstanding it?
Yes, to both - the article is correct, and yes, you seem to be misunderstanding it.
In the context of the article, "Disc drive" does not mean a hard drive. Earlier in the article it states -
Solution
"Disc drive" refers to CD, CD-R, CD-RW, DVD, DVD-RAM, DVD-R, Combo drives, SuperDrives.
The reason is that on most (if not all) G4s, an optical drive must be jumpered as Master in order for it to be a bootable drive. So, if an optical drive has been jumpered as Slave, it can not then be used to boot from the OSX Install disk.
You will need to place the drive to be jumpered as Slave in the top position of the bracket (the drive sled), and the one jumpered as Master in the bottom position of the sled.
The reason for this is the location of the connectors on the IDE ribbon cable (the data cable) - the one jumpered as Master needs to be attached to the end connector of the cable, and the one jumpered as Slave to the middle connector of the cable.
Because of the physical limits of the cable itself, the one jumpered as Slave must be on top, else the connectors won't reach to the proper drive.
Which drive is jumpered as which is your choice, but the one jumpered as Slave must be on top.
If I switch the position of my original drive will I lose access to the data on it?
No.
The designation of Master or Slave is, for the most part, simply to allow the Mac to have a unique physical address for each drive, so it can tell one from the other (this is separate from the pathname addressing that the OS uses). Re-jumpering a drive nor changing its physical location will not affect its contents nor their usability.
One result that may be important sometime is when the machine in question is set up as the Target machine in a firewire Target Disk Mode arrangement - only the drive jumpered as Master will be visible on the Host machine.
Article #58583 - Firewire Target Disk Mode

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Message was edited by: Grant Bennet-Alder

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http://support.apple.com/kb/HT1815
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Please click the white KUDOS star to show your appreciation
Frank
{------------ Please click the "White Kudos" Thumbs Up to say THANKS for helping.
Please click the "Accept As Solution" on my post, if my assistance has solved your issue. ------------V
This is a user supported forum. I am a volunteer and I don't work for HP.
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Let me try to direct you to some tips on CS5, and suggest that more hard drives properly used (OS, scratch, data, backup, array) can help, but that one drive and 4GB RAM is under performing.
Optimize Photoshop CS5
Optimizing Photoshop Overview
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What are you using the WD1001FALS for? data? scratch?
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Activity Monitor memory usage

Adding and configuring a second hard drive in a Power Mac G4

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