Two OS on same system

[Satish Y]

Hi Experts,

I want install two OSs like 10.20 and 11.x on same system and want to boot from whatever OS I want. How can I do this?... Do any one know the procedure?...

Can I install them on different partitions of same disk or do i need to use different disks for that?.

Cheers...
Satish.

[Ruediger Noack]

Hi,

you have to install the OSSs on different disk. The OS installation is without special things.
You can edit your primary and alternate boot path to boot OS1 or OS2 for your convenience.
Keep in mind if and how you mount the filesystems from other system disk how you need they.

Ruediger

[Marcin Wicinski]

Hi,
It will work if you install 10.20 and 11 on separate disks and set primary nad alternate boot patch to those disks. Then you will be able to choose system on ISL level by selecting a boot disk.
It's OK untill using shared (between OS) volume groups (other than vg00) and filesystems - be carful and check all shared filesystems to be created with options supported by both OS.
Later,

[harry d brown jr]

Satish, like they have said, install 10.20 on one disk(s) and then on another disk install 11.x

Just don't forget to keep a ioscan, print_manifest, vgdisplays, and a bdf handy (near by) (it helps when things get confusing).

live free or die
harry

[Ravi_8]

Hi,

you can't install 2 OS's on the same disk, but you can different or same OS's on different disks.
whenever you wanted to boot to a particular OS you can change the primary bootpath using
#setboot -p xxxx

[Sridhar Bhaskarla]

Hi Satish,

You can happily install 10.20 and 11.0 if you have two seperate disks.

1. Boot from one path and install 10.20. Create Volume groups etc.,
2. Boot from another path and install 11.0. Import the volume groups
3. Boot from any of the operating systems. When you need to boot through the other, simply change the primary path

setboot -p
setboot -a

Simply reboot the system and it will boot through the other OS. Repeat the same process for subsequent changes.

-Sri

[Helen French]

Hi Satish,

The LVM rule says " One disk should be exclusively used for a single VG". You cannot have two versions running on the same disk.

Install it on two disks. Set the boot path.

HTH,
Shiju