Dual booting an SE/30: Partition limits??

[bluesky6]

So I gave up trying to boot my Plus with a SCSI2SD and am now fiddling with an SE/30.

I have a 4GB micro SD on the SCSI2SD partitioned (via LIDO) into 2 partitions/volumes (maxed out 2GB in the first and the remainder in the second).

I have 6.0.8 in the first partition and it boots fine. I've 7.1 in the second partitioned (basically copied over from another hard disk and blessed.

I have been trying to select via "Set Startup" to boot the 7.1 partition but without success.

Must the boot partitions be under a 1GB or 500MB limit for them to be recognized as bootable???

 

[rickrob]

I don't think so-- I boot 7.1 on a SCSI2SD and System 6.0.8 has 2GB partition support.  How did you format the second partition?

 

[SoundChances]

Keeping the boot partition within the first 2 GB is a good idea and should allow the second partition to boot.

With the SCSI2SD, you can set it up to show up as multiple drives, so if you need all four gigs, you could set it up as 2 2G drives.

 

[bluesky6]

I used LIDO to partition the drive.

It defaulted to using the max for 6.0.8 ~2GB.

Then I manually created a second partition in the remaining space.

Both partitions types are Apple_HFS.

So partition 0 is Apple_Partition_map

Partition 1 is Apple_Driver

Followed by Partition 2 which is the 6.0.8 one and Partition 3 which is the one that doesn't boot which has 7.1 on it.

I am going to create a 1GB for 6.0.8 and 1GB for 7.1 to see if that solves the problem.

 

[bluesky6]

And....

it doesn't work.

2x 800MB partitions (in a 4GB CF card) with 6.0.8 in the first and 7.1 in the second. 

The SE/30 boots 6.0.8 with no problems. But ignores my attempts to boot 7.1.

I'm going to try the following next:

1. Re-install 7.1 from floppies. I'd copied the 7.1 system folder from another drive.

2. Flip the partitions: 7.1 in the first and 6.0.8 in the second

 

[beachycove]

Try it with System Picker, which may be more flexible in this situation.

 

[rickrob]

I set up my SCSI2SD with  HD SC Setup 7.3.5+ as a single 2GB partition and installed the driver on that, then copied over my System folder.

Maybe try setting up 2 devices in the SCSI2SD with separate SCSI ID's and a single 2GB partition on each?

 

[finkmac]

That's not gonna work. I've got a Macintosh II partitioned as one 6.0.8, one 7.0.1. As long as there is a valid System Folder on the 7.0.1 disk, it will try to boot from that.

System Picker is no use, neither is the System Disk control panel.

 

[joethezombie]

What if you setup the SCSI2SD to emulate two disks (ID0 and ID1) rather than partitions?  I have that setup in my IIfx and it works.  I can dual boot between 7.1 and 6.0.8.  I have them set at 1.6GB each.

 

[Bolle]

Just debless the system folder you do not want to use by taking out either Finder or System and be sure to bless the one you want to boot afterwards.

That way you can also just slap all system folders onto one partition. This is how I usually do multibooting on 68k Macs.

Just be sure to have a boot floppy around in case you mess up swapping around system folders.

 

[just.in.time]

The problem is that up until Mac OS 9.1(or maybe 9.0.4/9.2?), you can't specify which partition is the boot partition for a given SCSI ID using the Set Startup/Startup Disk control panel.

HOWEVER, when you downloaded Lido, there should have been Lido, the Lido INIT, a readme file, and last but not least, an application called PMount.  PMount will let you set which partition is the default boot partition for a given disk/SCSI ID (among other neat little setting, such as locking disks etc).  Use that, and then you don't have to hassle with blessing/deblessing System Folders.  This also has the benefit that the other partitions are still bootable if something should happen to the default boot partition.

Edit:  That, or you will have to do what joethezombie mentioned, making the SCSI2SD appear as unique SCSI IDs for each disk you create on it.  This will allow you to use the Startup Disk control panel to choose which disk is the boot disk.

Also, I'd recommend keeping your partitions one megabyte below 2GB if you are also using system 6.0.8 just to be safe.