I have a single physical disk of "500G" with a Centos 6.2 64-bit install taking up the full disk in an LVM as follows:
[centoslive@livecd ~]$ sudo pvscan
PV /dev/sda2 VG vg_test lvm2 [465.27 GiB / 259.42 GiB free]
Total: 1 [465.27 GiB] / in use: 1 [465.27 GiB] / in no VG: 0 [0 ]
[centoslive@livecd ~]$ sudo lvscan
ACTIVE '/dev/vg_test/lv_root' [100.00 GiB] inherit
ACTIVE '/dev/vg_test/lv_swap' [5.84 GiB] inherit
ACTIVE '/dev/vg_test/lv_home' [100.00 GiB] inherit
Now after using this setup for 6 months, I find that Centos 6.3 32-bit is better suited for my needs - using certain specific 3rd party programs with certain older versions is imperative for work - but is unsupported for 64-bit platform.
I tried out compat-libs and ia32-libs and a couple other solutions - VMware/Vbox is very slow.
And I also discovered 6.3 has far better network card support (at least for hardware in my workplace) compared with 6.2.
So I have about 250 G of space available into which I can make upto 3 more side-by-side Centos installs in the future, if I use say 80G for each install. I can make upto 3 80G logical volumes.
But can I use one (or each) of them to install Centos 6.3 32-bit (or later versions) ?
Will the installer allow installing to a single logical volume?
Will the installer update GRUB entries to make the 2 OSes - Centos 6.2-64 & 6.3-32 available as menu options or do I need to do it manually?
Grub version is GNU GRUB 0.97
Thanks in advance.