Need Advice: I Want To Add An SSD To My G4 Mirror Door & Install OS 9 On It

2112st

Tinkerer
Oct 8, 2023
257
98
28
Northeastern New Jersey, USA
Hey folks! This is the first time I'm trying something like this. This will be a second boot up drive that will just have OS9. Reason? I'm recovering files from hard drives that were in beige Macs, and I want to be able to save them to this SSD and perhaps transfer them onto USB sticks.

I want to have the option of being able to boot up OS9 or boot up the other drive which has OSX (the original drive that came with the mirror door).

As you can see, there's already a SCSI card here. What else will I need? I'm looking at getting a 250-gig SSD.

Thanks! :)

G4 mirror door 12-30-23.jpg
 

eric

Administrator
Staff member
Sep 2, 2021
941
1,542
93
MN
scsi.blue
Is the SSD your using SATA? If so I usually put SATA cards (cheapo $6 ones from Ali Express flashed for mac) - works great - you can sometimes find slightly more expensive old stock on ebay too. key words are sil3112. There's a great thread here with all the details and cavorts https://tinkerdifferent.com/threads...i-power-mac-impossibru-updated-11-22-23.1494/

You can easily dual boot OS9 and OSX on the same drive - only OSX that requires separate partitions for separate versions of the OS. Usually when using such a huge drive on these older machines it's advisable to put the boot partition in the first 128GB only - and the rest can be for data/apps/etc.

If you're going to move those images to something like a BlueSCSI(for use on a real machine) or an emulator - make sure to grab the full byte for byte copy of the drive so it includes the SCSI driver and partition map. If you accidentally just grab the HFS partition a utility like Disk Jockey can convert it for you.

Hopefully that gives you something to start with.
 
  • Like
Reactions: 2112st

2112st

Tinkerer
Oct 8, 2023
257
98
28
Northeastern New Jersey, USA
Is the SSD your using SATA? If so I usually put SATA cards (cheapo $6 ones from Ali Express flashed for mac) - works great - you can sometimes find slightly more expensive old stock on ebay too. key words are sil3112. There's a great thread here with all the details and cavorts https://tinkerdifferent.com/threads...i-power-mac-impossibru-updated-11-22-23.1494/

You can easily dual boot OS9 and OSX on the same drive - only OSX that requires separate partitions for separate versions of the OS. Usually when using such a huge drive on these older machines it's advisable to put the boot partition in the first 128GB only - and the rest can be for data/apps/etc.

If you're going to move those images to something like a BlueSCSI(for use on a real machine) or an emulator - make sure to grab the full byte for byte copy of the drive so it includes the SCSI driver and partition map. If you accidentally just grab the HFS partition a utility like Disk Jockey can convert it for you.

Hopefully that gives you something to start with.

Thanks for the response! :)

The original drive that came with this Mac already has OSX and a number of files on it-I don't want to touch that drive. The SSD will likely be a SATA drive, and I will only be using it to back up files from the old SCSI drives I have lying around. That's why I want to install OS9 on it.
 

Trash80toG4

Active Tinkerer
Apr 1, 2022
910
260
63
Bermuda Triangle, NC USA
AFAIK, the only MDD that can boot into OS9 natively is the FW400 released just for that very purpose. Which version do you have there? If it's FW800 you're stuck with OS9 running in emulation or Classic(?) or whatever you call is. I call it FAUX9
 
Last edited:
  • Like
Reactions: 2112st

Patrick

Tinkerer
Oct 26, 2021
434
1
224
43
on the back of the mac, The firewire port is either 400 or 800.

If its 400 it can boot OS9

1704233506224.png


so look on the back. If its the one that is 800, then it prolly won't boot os 9 native.

(i think there is a way to hack it, but I don't know off the top of my head)
 
  • Like
Reactions: 2112st

Patrick

Tinkerer
Oct 26, 2021
434
1
224
43
looks like 400 too me.
it should boot OS 9 fine.

I do remember when Apple removed support for booting OS9 . and it was connected to when they updated to FW800.
 
  • Like
Reactions: 2112st

2112st

Tinkerer
Oct 8, 2023
257
98
28
Northeastern New Jersey, USA
looks like 400 too me.
it should boot OS 9 fine.

I do remember when Apple removed support for booting OS9 . and it was connected to when they updated to FW800.
I assume that, once I install an SSD, I should be able to install OS9 onto it, yes? I'm thinking about getting a 250 GB SSD. This SSD will only be used to back up data from the old SCSI drives; I plan on putting nothing else there.
 

Patrick

Tinkerer
Oct 26, 2021
434
1
224
43
I assume that, once I install an SSD, I should be able to install OS9 onto it, yes? I'm thinking about getting a 250 GB SSD. This SSD will only be used to back up data from the old SCSI drives; I plan on putting nothing else there.
YES, in theory.

some SSD's don't work in older computers. so .. thats the only sticking point. (that is, if it doesn't work, its prolly a incompatible ssd drive)

..
thats what eric was talking about up there ^ when he mentioned 'sil3112'

So try it. and let us know.
 
  • Like
Reactions: 2112st

Trash80toG4

Active Tinkerer
Apr 1, 2022
910
260
63
Bermuda Triangle, NC USA
I do remember when Apple removed support for booting OS9 . and it was connected to when they updated to FW800.
Yep, IIRC all the MDD's were FW800 until the content creators pitched a fit because their apps had yet to be up(down)graded to be compatible with OSX. That was one miserable experience for the first couple of releases, took it off my machine and never paid for required upgrades. OS9 versions worked just fine in production thru mid-2004 when I closed up shop. They still work fine, doing all I need for graphics playtime.

Still periodically trying to get my MDD/OS9 Special up and running . . . one day. :oops:
 

Volvo242GT

Tinkerer
Feb 7, 2022
307
167
43
Currently Duvall, WA
Yep, IIRC all the MDD's were FW800 until the content creators pitched a fit because their apps had yet to be up(down)graded to be compatible with OSX. That was one miserable experience for the first couple of releases, took it off my machine and never paid for required upgrades. OS9 versions worked just fine in production thru mid-2004 when I closed up shop. They still work fine, doing all I need for graphics playtime.

Still periodically trying to get my MDD/OS9 Special up and running . . . one day. :oops:
Early MDD machines were FW400. Later versions were FW800, until the single 1.25GHz model came out, using the older board.
 

Trash80toG4

Active Tinkerer
Apr 1, 2022
910
260
63
Bermuda Triangle, NC USA
Early MDD machines were FW400. Later versions were FW800, until the single 1.25GHz model came out, using the older board.
Learn something new every day:
Three tier first gen MDD released 8/13/02 were FW400, booting into OS9 or OSX
Three tier second gen MDD released 1/28/03 had FW800 and limitation to running Classic under OSX
Last gen (re-gen?) MDD released 6/23/03 with FW400 and booting directly into OS9 again!

Thanks, bud! :)