On Thu, Jun 04, 2009 at 09:39:42AM -0400, Douglas A. Tutty wrote: > On Wed, Jun 03, 2009 at 10:04:36PM -0500, Zhengquan Zhang wrote: > > On Wed, Jun 03, 2009 at 06:48:03PM -0400, Douglas A. Tutty wrote: > > > On Wed, Jun 03, 2009 at 11:44:00AM -0500, Zhengquan Zhang wrote: > > > With one big partition, you lose the ability to: > > > > > > - have a separate /var (or /var/log) to keep logs from > > > filling up / > > > > > > - have different mount options (e.g. noexec, nodev) on > > > /home > > > > > > - have a separate /home > > > > > > > > > Without LVM, you lose the ability to : > > > > > > - resize partitions as needed > > > > > > - migrate data from one disk to another, e.g. if a drive > > > starts misbehaving but you need to keep the system live > > > rather than reinstalling/restoring. > > > > Could you elaborate more on this? As far as migration is concerned, what > > is the advantage of LVM? > > Your system is operating. You start to get either SMART indications > that the drive is dying or errors (e.g. retries, times-out, etc) in > syslog. You add a drive to the system at least as big as the failing > drive. You make it a physical volume for LVM, and add it to the VG of > the failing drive. You then tell LVM to remove the failing drive from > the LV. LVM will migrate the data, extent by extent, from the old drive > to the new drive, all while the system is still active. Its all in the > LVM-HOWTO (tldp, in the doc-linux-html package).
This is fantastic, I have read the howto but obviously did not notice this part. > > > > Instead of a separate /boot, I often use a separate / (which contains > > > /boot). In this way, the / partition isn't part of LVM (I make it 500 > > > MB and usually only have under 200 MB used) and can be booted into if > > > the need arises, with more tools available than within the initrd. Most > > > of my boxes won't boot a live CD. > > > > So I guess for /tmp /var /usr etc you have separate LVs? or else a 500M > > / should be too small? > > I put /tmp on tmpfs, with encrypted swap (so that /tmp ends up encrypted > also). Yes, /usr (4G) , /var (4-6G, depending ), and /home (encrypted) > are on separate LVs. Sizes depend on what I'm doing. /usr mostly holds > instaled packages so 4G is fine for my desktop system. > > I also have /var/tmp and /var/local as separate LVs, encrypted. I keep > my backups in /var/local. KDE keeps lots of otherwise private stuff in > /var/tmp. Great setup, Thanks, Doug, so do you how much space(PE) do you leave unassigned for later use? > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org -- Zhengquan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
