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echo: os2user-l
to: All
from: Felix Miata
date: 2005-10-26 13:26:26
subject: Re: Changing partition size and still able to boot os2

Duncan Way wrote:

> I want to increase the size of my xp partition.
> I am running Warp4/fp15 with the latest fdisk/bootmanager from ECS.
> I am using Dani's dasd and 506.
 
> My current setup is:
 
> C:  5000 mb  -- xp (fat32)
> D:  700  mb  -- programs (hpfs)		; 5700
> E:  600  mb  -- data (hpfs)			; 6300
> F:  600  mb  -- Warp4 (main boot, hpfs)	; 6900
> G:  400  mb  -- Warp4 (maintenance boot, hpfs) ; 7300
> H:  10000 mb -- hpfs partition which I would take space from to increase C:
 
> (there are other partitions, but they don't come into play)
 
> I would be using PartitionMagic 5.0 to change the partition sizes.
 
> Is there any way I could check beforehand that adding the space to C: would stop
> either OS/2 from booting.  The drive in question is SATA; if that makes any
> difference.

> My motherboard is an Abit AN7 with the latest BIOS applied, approx. 1 year old.
 
> Fdisk /query gives the **8mb line displayed.

> I am not using ECS or LVM.  I know I can increase the size of my C: xp
partition using
> PM 5.0.  I want to know if increasing it will push my F: warp partition beyond a
> bootable number of cylinders.
 
> I have dfsee and cannot see a safe solution that PM5.0 does not offer.

IIRC, the old OS/2 Boot Manager simply cannot see any partition that
doesn't start before the 8GB line (cyl 1024), and OS/2 may not be able
to boot a partition that isn't fully below cyl 1024. If this
recollection is correct, and I think it is, then you could add no more
than about 700MB to the windoze C: and keep everything you have now
working.

I suggest you buy a 2nd HD. They've gotten really cheap/GB, the best
value around in backup strategies. Clone your whole current HD to it,
swap disks, test to make sure everything on the new one works as
expected, then experiment to your heart's content on either the old or
the new, while the other is sitting safely in a box other than your PC.
PM may very well be able to do what you want if you only need C: to be
700 MB larger, but I wouldn't attempt it without a very good backup. My
experience with PM for resizing disks with more than a few partitions
has not been stellar, and it can get very slow on large disks, since it
runs in pseudo-real mode from DOS. For a gain of only 700-1100 MB, I
wouldn't attempt this approach unless no other options existed,
including leaving everything entirely alone.

If you really want to keep using the old FDISK BM, do your backup first,
then do a major rearrangement. Put your maintenance partition at the
front of the disk on C: so that you'll have a working maintenance
partition available no matter what happens elsewhere later. Follow that
with BM as the 2nd primary. Then make a tiny primary FAT C: partition
for starting doze, 30-40MB is plenty. Then make your logicals. You can
clone all of your current D:, E:, and F: and have everything in OS/2
that didn't depend on your FAT32 partition work exactly as before. Then
make a new G: of whatever size you wish for XP, followed by whatever is
leftover for your H:. Before installing XP on G: (which will actually
boot from the little FAT C:), make your little FAT C: primary startable,
then install XP, then reset BM startable. As long as you have some FAT
C: primary somewhere to boot it from, XP can reside anywhere you please
to put it.
-- 
"Be quick to listen, slow to speak."                James 1:19 NIV

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://members.ij.net/mrmazda/partitioningindex.html



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