root on LV should be used by advanced users only

Mon May 29 17:06:15 UTC 2006

It means that if your root filesystem resides on the LVM partition, the
kernel will need the LVM subsystem activated before mounting the root
filesystem. Of course, this means that the activation should be made
without using the root filrsystem or anything on it. Therefore, the LVM
activation should be done from the initrd image (and the image should be
appropriately made for that purpose), because it is passed to the kernel
by bootloader and is accessible without the need for the root
filesystem.

Anyway, you usually does not need to prepare such an initrd image
manually because all current distributions have the LVM support already
built in the shipped initrd images and mkinird scripts.

Alexey Fadyushin

Brainbench MVP for Linux.

http://www.brainbench.com

________________________________

From: redhat-install-list-bounces at redhat.com
[mailto:redhat-install-list-bounces at redhat.com] On Behalf Of Salman
Siddiqui
Sent: Monday, May 29, 2006 8:25 AM
To: redhat-install-list at redhat.com
Subject: root on LV should be used by advanced users only

--------------------------------------------------------------------  
root on LVM requires an initrd image that activates the root LV. If a
kernel is upgraded without building the necessary initrd image, that
kernel will be unbootable. Newer distributions support lvm in their
mkinitrd scripts as well as their packaged initrd images, so this
becomes less of an issue over time. 
--------------------------------------------------------------------

i found this on following link
http://en.tldp.org/HOWTO/LVM-HOWTO/benefitsoflvmsmall.html

what this means ???

i cannot give lvm to root??

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