for testing (some customer need esx 4.0 and other 4.1) purpouse i need to install a dual boot with esx 4.0 and 4.1.
Of course when i'll use one i will not use second one .
I know how to use grub but my 'problem' is partition table.
after installing first one (ex esx 4.0) i0ve got a table like this:
thx for answer Andre,
but i need to put on ESX different VM....so that sometimes i'll activate one on ESX4.0 and other time one on esx4.1 (reason is different requirement for application)..
Technically 4.1 is nothing more than 4.0 with some patches. It's NOT a different ESX version, so you can run either, they are identical, except for a very few changes in patches.
So there is really no need to run different ESX, for compatibility (althought technically 4.1 will STILL be the same) you could keep it at 4.0, but if a customer wants to test it, install 4.0 then upgrade it to 4.1. You can always RE-install 4.0 at a later date and you won't lose your VM datastore.
You can't dual boot ESX.
if esx 4.0 and 4.1 are same may i manage 4.1 ith VC 4.0 and viceversa?
No. VC 4.1 can manage 4.0/4.1 ESX, but VC 4.0 can ONLY manage 4.0 and lower, so upgrade VC to 4.1, that way no need to worry which version of ESX you have.
You can only manage 4.1 with vCenter 4.1. vCenter 4.1 can manage 4.0 and 4.1.
If you install ESXi to a USB stick it is easy to replace the stick and restart in an alternate version.
i think i've simply done it.
destroyed raid 1 so i had 2 single HD.
quite sorry that is not possible to create something like other OS (maybe yes but i'm not a linux guru ) as (hd0,1) or stuff like that.
first HD ESX 4.1
second HD ESX 4.0
command esxcfg-boot -b
title VMware ESX 4.1
kernel /vmlinuz ro root=UUID=8acf24c3-8ab9-4651-af84-ee9801f6fe2c mem=500M quiet
title Troubleshooting mode
kernel /trouble/vmlinuz ro root=UUID=8acf24c3-8ab9-4651-af84-ee9801f6fe2c mem=500M trouble quiet
title VMware ESX 4.0
kernel /vmlinuz ro root=UUID=d304a608-945d-42bc-b8a4-d43ae156685a mem=500M quiet root=/dev/sdd1
double boot works