(Answer) (Category) Linux on PowerPC FAQ-O-Matic : (Category) MkLinux :
Partitioning Jaz cartridges for MkLinux
FWB Hard Disk Toolkit 2.5 will partition the cartridge. There are vague instructions on pg. 9 & 43 of their user manual. Review those first.
Here is what I did. 1) Autoinitialize the cartridge (this will install their drivers and check the format); it may fail, and ask for a low level format; do so. 2) Choose 'view partitions' from the menus; select and delete the mac partition (only) on the cartridge. Choose 'new volume' from the menus and set up the Mac volume. I used 100Mb and was able to install 7.6.1; this should leave some room to drop more files here. 3) Choose 'new volume' again. Select OTHER from the popup, type in 'Apple_UNIX_SVR2' in the file system type blank, and 'root' in the partition name blank. 4) Repeat 3 with names of 'swap' and 'usr'. Follow the MkLinux doc advice for partition sizes; I used 100, 128 & 700 Mb for mine. 5) Install a system on the Mac partition, then MkLinux. You'll have to match the UNIX partition names to the corresponding UNIX partitions during install of MkLinux.
There appears to be a problem with using pdisk to partition Jaz
cartridges. I initialized the cartridge using Silverlining 5.7; then
set up partitions using pdisk. Pdisk seemed to run successfully and
set up the requested partitions, and the install program ran to 
completion and reported a successful install. However, MkLinux would not
boot, and the cartridge was no longer recognizable by my Mac. 
Subsequent cartridge insertions would produce a message, "This is not
a Macintosh format disk; do you want to erase it?" I went thru the process 
of initializing and partitioning with pdisk with different minor 
variations in procedure about three times. Each time the disk was unreadable
after partitioning with pdisk. I finally performed the partitioning
also within Silverlining 5.7, and was then able to install & boot
MkLinux successfully.

___________________________________________________

If you MUST use pdisk, be sure the MacOS partition is created first 
and is of the "Apple_HFS" type.You can use the "C" option to explicitly 
create a partition of a particular type.
(don't overwrite the partition map, iomega diskinfo, or Apple driver - 
you can start your first block after those...) 
 
The other partitions (root,swap,and usr) can be set up without 
explicitly setting the type of the partition.(using the "c" option) 
They will default to the type "Apple_UNIX_SVR2". After I figured all of 
this out, MkLinux installed successfully and runs fine... and the mac 
still recognizes the Jaz disk too.
                                                                                                                -patrick@imijcorp.com

___________________________________________________

I have documented a procedure to prepare a Jaz cartridge for Linux.
While my original intent was for LinuxPPC, it works equally well for
MkLinux. This technique retains Iomega's bad block space to reduce
future problems.

The procedure can be found at: http://www.vmug.com/linuxppc/

lna@bigfoot.com
-patrick@imijcorp.com, lna@bigfoot.com
To make it short:
1. Use HDT 2.5 or later to format the Jaz cartridge
(Apples Drive Setup dosn't work with non-Apple devicex)
2. If you need (a) mac volume(s) on the Jaz, create it (with HDT) first
3.a) You could use HDT to create the linux partitions, use the option for
-other- filesystems and be shure to set the right partition type (sea docs)
3.b) You could also use the pdisk tool to create the linux partitions (you need
at least a /swap and a /root), see the pdisk help (with "?")
3. a & b) Name the partitions so that linux could find them ( /root and
/swap etc.) otherwise you get an arrow during installation saying that the
kernel couldn't read the disk
schmidt9@gmx.net
I tried installing MkLinux DR3 on a jaz cartridge following the advice on this page. I tried it using both the Iomega driver in the driver partition and, later, with the FWB driver. On separate occasions, I used pdisk and FWB's toolkit for partitioning for Apple_UNIX_SVR2. Guess what: None of these suggestions worked. This is no criticism. I'm sure that sometimes on some machines these suggestions work, but they did not work for me and my G3. I was able to get to the install portion of the Red Hat package but, after selecting what to install and clicking "ok," the machine would throw up a screen full of error messages and then crash the installer. So, if you've followed the suggestions here and they didn't work, don't be discouraged. Just do what I did: Buy an external SCSI drive. The install went without a hitch on the SCSI drive.
Ken
petri.1@osu.edu
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