mr700@xxxxxxxxxxxx wrote:
On Friday 30 April 2004 05:11, Ow Mun Heng wrote:okay - there are a few steps one needs to take to get their system using LVM. It can be tricky to get your brain around at first but it will slot into place. The steps are quite straight forward - even when setting up post install. Here's a brief overview. I'm assuming you can follow the man pages of each of the commands specified - there are a number of options which will be up to you:
I don't remember how I did this with RH9 to make it work, but I rememberI've actually looked through the howto but am still unable to determine-----Original Message----- From: neil [mailto:neilcuk@xxxxxxx] Sent: Thursday, April 29, 2004 10:35 PM To: For users of Fedora Core releases Subject: Re: what are the restrictions on bootable partitions?
rpjday@xxxxxxxxxxxxxx wrote:
what are the restrictions on where i can install anotherlinux distro
onto my fedora core (actually, FC2-t3) system so that grubcan find it?
There are no restrictions other than the boot loader (grub) must be able to read the boot partition.(even though this is a test version of fedora, this question actually refers to FC distros in general.)
typically, for historical reasons, even when i use LVM, icreate a small
primary, ext3 filesystem for /boot, and use LVM for the restof the drive.
is there any compelling reason for doing this anymore? what's the recommended strategy for LVM? and need for a non-LVMfilesystem on newer
It really depends on what the system will be used for. Check out the howto here: http://www.tldp.org/HOWTO/LVM-HOWTO/index.htmlmachines?
how to actually create a lvm system. I've recompiled my kernel to have the devive mapper as a module and modprobe'ed it.
When I try to do vgscan it states that the kernel modules are not loaded.
I played a bit whth modprobe, the LVM tools and the man pages :)
Please help.
http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/sysadmin-guide/ch-lvm.html http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/sysadmin-guide/ch-lvm-intro.html http://www.redhat.com/docs/manuals/linux/RHL-8.0-Manual/custom-guide/ch-lvm.html http://www.redhat.com/docs/manuals/linux/RHL-8.0-Manual/custom-guide/ch-lvm-intro.html http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/custom-guide/ch-lvm-intro.html ... I did install FC1 with Software Raid 5 and LVM on top of it, but doing so on less than three physical disks results to up to 5 times slower transfer (because of the raid). If you have 3 disks read speed increases and the write speed is almost the same. Using ReiserFS I was able to resize 61G LV to 64G LV without errors. With ext3 it worked, but fsck.ext3 had a lot of work to do (the partition was ~50G full). I hope one day online resize will work with bouth and reiserfs will get more stable with acl and SELinux support. http://www.aplawrence.com/Linux/lvm.html ps: putting the /boot partiton ouside the LVM worked fine for me.
as root
One(a): Make sure you have backed up any important data before trashing your system ;-)
One: make sure your kernel supports LVM (By default this is supported in FC1)
Two: create some LVM partitions (of type 8e under fdisk)
Three: reboot or execute partprobe
Four: execute vgscan
Five: use pvcreate to assign your newly typed disks as use within the LVM
(actually, four and five might be back to front)
Six: use vgcreate to generate a new volume group (and add some physical volumes tro it)
Seven: use lvcreate to make your logical volume
Eight: format your new logical volume
then it's up to you - mount as you like
use e2fsadm to extend and reduce the size of the volume
There is a huge amount of documentation and you should really get to grips with resizing, adding new PVs etc. Before you start putting useful data on your new LV!
hope this provides some guidance.
neil
