Re: ADU Question

[dempson@actrix.gen.nz (David Empson)]

"Joel" <joelbuckley54.nospam.@hotmail.com> wrote:

> I'm using System 6.01 Advanced Disk Utility with a HS SCSI card with a 2GB
> hard drive.
> By the manual, I should be able to do 32 partitions (>1GB drive).
> But it won't let me do more than 8.
> Anybody have any ideas on what my problem could be?
> (Has somebody actuallu used ADU to do more than 8 partitions?)

I ran into this problem as well, and managed to work around it, but I
don't recall the precise details off the top of my head.  I have about
thirteen partitions on my 850 MB drive (eight 32 MB ProDOS, four about
128 MB HFS and a small ProDOS partition for the rest), and I partitioned
it using ADU.

The general details of the solution were to do the partitioning in two
steps:

1. Repartition the drive so that it has a single partition occupying the
entire disk.

2. Partition the drive again as you want to do it.  You should now be
able to create 32 partitions on a 1 GB or larger drive.

The issue might be the number of entries available in the original
partition table.  ADU might only recreate the partition table if you
remove all partitions first.

> Does anybody know of a SCSI block editor for the IIgs?
> Not a ProDOS block editor which only accesses data within a partition, but a
> SCSI block editor which would allow me access to the partition table.

I haven't seen one.  Apple did have some low level calls available to
access the SCSI device map and partition tables, and I seem to recall
writing some simple tools to make use of them for reading and writing
the Mac driver, but I don't think I did anything with the partition
table as such.

-- 
David Empson
dempson@actrix.gen.nz