[Novalug] disk organization question

[Angelo Bertolli]

Bonnie Dalzell wrote:
> I am configuring a multiboot laptop right now.
>
> first time through I made 4 primary partitions
>
> (1)  a ext2 partition /hda1 with root (/)on it
>
> (2) ext3 partition /hda2 wit /home on it. 
>
> (3) a hard file partition with my amiga/amithlon OS on it
>
> (4) a linux swap partition.
>
> Then I decided I wanted to add FreeDOS to the mix.  
>
> But I had no primary partitions left so I deleted the swap partition and
> resized the ext3 partition - made a new primary partition out of the
> excess and then made a logical vfat partition for freedos and a seocnd 
> logical partition for linux swap.
>
> Well linux still boots, amithlon boots. Freedos boots from its CD and 
> installs on the vfat partition but grub gives me a error 12: when I try
> and boot into freedos from the grub menu. The freedos people suggested
> that maybe grub cannot boot an OS from a logical partition.
>
> DOes anyone have any insight into this?
>   
GRUB should be able to load any of the partitions. However, you may need 
to do a grub-install again after changing the logical partitions because 
logical partitions are a "linked list" of partitions, whereas primary 
partition address information is stored in the partition table. After 
doing a grub-install, it should be able to boot a logical partition like 
freedos with a chainloader +1 command.

Angelo