> -----Original Message----- > From: neil [mailto:neilcuk@xxxxxxx] > > > mr700@xxxxxxxxxxxx wrote: > > >On Friday 30 April 2004 05:11, Ow Mun Heng wrote: > > > > > >>>-----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 another > >>>> > >>>> > >>>linux distro > >>> > >>> > >>>>onto my fedora core (actually, FC2-t3) system so that grub > >>>> > >>>> > >>>can find it? > >>> > >>> > >>>>(even though this is a test version of fedora, this > question actually > >>>>refers to FC distros in general.) > >>>> > >>>> > >>>> > >>>> > >>>There are no restrictions other than the boot loader (grub) > >>>must be able > >>>to read the boot partition. > >>> > >>> > >>> > >>>> typically, for historical reasons, even when i use LVM, i > >>>> > >>>> > >>>create a small > >>> > >>> > >>>>primary, ext3 filesystem for /boot, and use LVM for the rest > >>>> > >>>> > >>>of the drive. > >>> > >>> > >>>>is there any compelling reason for doing this anymore? > what's the > >>>>recommended strategy for LVM? and need for a non-LVM > >>>> > >>>> > >>>filesystem on newer > >>> > >>> > >>>>machines? > >>>> > >>>> > >>>> > >>>It really depends on what the system will be used for. > Check out the > >>>howto here: http://www.tldp.org/HOWTO/LVM-HOWTO/index.html > >>> > >>> > >>I've actually looked through the howto but am still unable > to determine > >>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 don't remember how I did this with RH9 to make it > work, but I remember > >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/s > ysadmin-guide/ch-lvm.html > >http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/s > ysadmin-guide/ch-lvm-intro.html > >http://www.redhat.com/docs/manuals/linux/RHL-8.0-Manual/custo > m-guide/ch-lvm.html > >http://www.redhat.com/docs/manuals/linux/RHL-8.0-Manual/custo > m-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. > > > > > > > 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: > > 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! Thanks for the info Neil. I think I do have a hang of it.. sort of anyway. So, what you're saying is that I have to create the LVM partition using fdisk 1st before I can get to execute vgscan?? Currently I just type vgscan and then it complains vgscan -- LVM driver/module not loaded?? (it's loaded. The module is named dm-mod.ko right??)
