On Sun, Dec 25, 2011 at 04:12:48PM +0800, Thomas Goirand wrote: > On 12/22/2011 07:07 PM, Russell Coker wrote: > > It seems to me that wanting to have / outside LVM but /usr inside LVM is a > > fairly obscure corner case. > I have about 100 servers setup this way, and my laptops as well. I really > don't see why this would be a corner case. Please understand that many > different people have many different configuration, and that in today's > Debian, *absolutely everything is allowed*, and never, ever, Debian said > that one type of setup would one day be forbidden.
Several years ago, it used to be the case that a combination of bootloader support and/or initramfs support meant that it was not possible to have / on LVM. Nowadays, it's possible to have the rootfs on LVM on MD raid, and the bootloader and initramfs are perfectly capable of setting things up properly. While it's still possible to set up a system the "old way", today this is sub-optimal and definitely not to be recommended. For example, on the laptop I'm writing this on: % mount | grep mapper /dev/mapper/sysvg-root on / type ext3 (rw,relatime,user_xattr,errors=remount-ro,commit=0) /dev/mapper/sysvg-usr on /usr type ext3 (rw,relatime,user_xattr,commit=0) /dev/mapper/sysvg-var on /var type ext3 (rw,relatime,user_xattr,commit=0) /dev/mapper/sysvg-home on /home type ext4 (rw,relatime,user_xattr,commit=0) I used to use exactly the setup you are using. But for all the systems I've installed in the last few years, there was no point-- everything including swap can just go into an LVM VG. On more recent systems, I also omit the separate /usr given that it's effectively pointless. Regarding it being a corner case, this is I think true. It's no longer a recommended setup. While obviously this will necessarily continue to be supported for now and for a good while yet, it might not be in the distant future. Regarding "absolutely everything is allowed", this is not really true. At some point some things do need retiring (I'm not saying this is true for the above, yet) when there are obviously better ways of accomplishing the same thing. Regards, Roger -- .''`. Roger Leigh : :' : Debian GNU/Linux http://people.debian.org/~rleigh/ `. `' Printing on GNU/Linux? http://gutenprint.sourceforge.net/ `- GPG Public Key: 0x25BFB848 Please GPG sign your mail. -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20111225114059.gx5...@codelibre.net
