Originally posted by: SystemAdmin

Hi there!
Is there a step by step guid how to install dual boot system?

In fact i have manage to install both systems on each hard disk.
But cannot access 5.3 OS :(

I've install 5.2 on hdisk1 and after that 5.3 on hdisk0.
Now i manage to get 5.2 running but 5.3 says "No operating system Installed"

What have i missed during installation? :((

Brgds,
Sergej

Originally posted by: SystemAdmin

It should work assuming that your 5.3 actually installed on hdisk0, you should be able to use bootlist -m normal hdisk0 to boot from that disk. It sounds like the 5.3 installation wasn't sucessful or was written to hdisk1 and overwritten by the AIX 5.2 install.

You also might want to look at the device address used by hdisk0 and hdisk1, because there is no guarentee that either OS or the install media would assign the same name to hdisk0 & hdisk1 (for example, if you do a

lsdev -C c disk
one AIX instance may display:
hdisk0 Available 10-80-00-2,0 16 Bit LVD SCSI Disk Drive
hdisk1 Available 10-80-00-4,0 16 Bit LVD SCSI Disk Drive

while the other AIX instance (or the installation) may display:
hdisk1 Available 10-80-00-2,0 16 Bit LVD SCSI Disk Drive
hdisk0 Available 10-80-00-4,0 16 Bit LVD SCSI Disk Drive

It is generally pretty deterministic for simple disk
configurations, but it could be different in some cases.

If that happened, you could have accidentally overwritten
the AIX 5.3 disk with the AIX 5.2 installation.
Jay

Originally posted by: SystemAdmin

And what is your suggestion which way is the best way to install dual boot system?

Brgds,
S.

Originally posted by: dimon

Maybe something went wrong when the boot image was generated on hdisk0. Try the following:

1. Boot into maintenance mode using 5.3 media and import the rootvg on hdisk0 (filesystems mounted)

2. bosboot -ad /dev/hdisk0

3. reboot

Originally posted by: SystemAdmin

How do i "import the rootvg on hdisk0 " ?

Brgds,
S.

Originally posted by: SystemAdmin

Ok!
I released how to import rootvg .... but now i have a strange problem ...
I manage to boot into 5.3 ...and then again wants to boot into 5.2
"bootlist -m normal hdisk0" succesfull!
Now when i want to boot back into 5.3 (bootlist -m normal hdisk1) still get "No operating system installed" !!! :(

Can anyone tell me were is the problem and how can i rid of it?

Brgds,
S.

Originally posted by: SystemAdmin

Why don't you use alternate disk installation functions.
fileset = bos.alt_disk_install.rte
smitty alt_install

With this solution, you can wake up ( import ) a rootvg from your AIX 5.2 hdisk into your current AIX 5.3 environment.

Best regards ...

Originally posted by: SystemAdmin

Hi sebLux!
Thank you for your answer!
I am pretty new in AIX :(

When i make smitty alt_install i get this:

Move cursor to desired item and press Enter.

Install mksysb on an Alternate Disk
Clone the rootvg to an Alternate Disk
NIM Alternate Disk Migration

Which option do i have to select to make my machine dual boot?
Right now i got 5.3 installed on hdisk1

Brgds,
S.

Originally posted by: SystemAdmin

I tried all stuff you told me ... but unssuccesful :(
On 5.2 system i see:

#lspv
hdisk0 005b9f3f2fcf2767 rootvg
active
hdisk1 0005104d719de3ce None
On 5.3 system i see:
#lspv
hdisk0 0005104d719de3ce None
hdisk1 005b9f3f2fcf2767 rootvg
active
I am in 5.3 and i can boot in 5.2 with:

1. bootlist -m normal hdisk0

#shutdown -Fr
But when i want to boot from 5.2 to 5.3 with command:
#bootlist -m normal hdisk1
I get "No operating system installed"
:((
I ve installed new and clean install for both systems.
For 5.2 i ve selected just one disk (hdisk0) and for 5.3 also just one
disk (hdisk1)

Can anyone tell me where the problem lies?

Just for info:
(On console) I can go to maintanance mode with 5.3 CD inserted ... import volume group (rootvg) and do:

#bosboot -ad /dev/hdisk1

After that i change:
bootlist -m normal hdisk1
Reboot and i CAN login to 5.3 ...but after that when i reboot into 5.2
again cannot reboot into 5.3 "!@#!@#!@# I get the same note like i said above
"No operating system installed"
WTF!!!
Brgds,
S.

Originally posted by: Jorf

Look at the PVID of hdisk0 and hdisk1,
It is clear that when booted from AIX 5.2 hdisk0 (PVID 005b9f3f2fcf2767 ) is hdisk1 (PVID 005b9f3f2fcf2767) when booted from AIX 5.3.

I expect that you have installed both versions on the same disk (i.e you overwrote the first installation when you installed the second OS level).

To verify, run oslevel -r each time you boot the machine.

To make sure you install each version of AIX on a differnet disk, verify the location codes of the disks during the installation.

Originally posted by: SystemAdmin

So you are suggesting that i mark the same disk (as 5.2) when installing a new copy of 5.3 installation? :)

Brgds,
S.

Originally posted by: VirtualGreg

I'd suggest you watch for the disk location codes - they will never change! The disk numbering hdisk0, hdisk1, ..., hdiskn is not guaranteed to stay the same over time.