From: Brouard Nicolas In-Reply-To: <1064315989.6594.53.camel@homebrou> References: <1064315989.6594.53.camel@homebrou> Content-Type: multipart/alternative; boundary="=-rUDS+wjXtq/Foaye5WY8" Message-Id: <1064330690.28267.110.camel@homebrou> Mime-Version: 1.0 Subject: [linux-lvm] Re: [SuperRescue] LVM support on Mandrake CD 1 Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Tue Sep 23 12:08:05 2003 List-Id: To: superrescue@zytor.com Cc: linux-lvm@sistina.com, vonhagen@vonhagen.org --=-rUDS+wjXtq/Foaye5WY8 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Hi, I have had problem with my root partition which is often (twice) garbaged by e2fsck with dupplicated file names! It may also affect the Logical Partitions (/usr, /var, /home, /tmp, swap) if someone says Y for e2fsck. =20 So I wanted to have a backup of my root partition both as an additional logical volume and as a backup (250 Mb) on a host from my network. Doing the backup partition on a host with dd made me angry because I spent time to mount root partition with NFS (see below) in order to suppress the "access denied". But the main purpose of my search was to have a rescue disk with LVM loaded and ready to use. In a first step, I did not know how to do it with Mandrake CD 1 (rescue disk) and moved to Superrescue which has been described in Linux Planet as being able to do it (http://www.linuxplanet.com/linuxplanet/reports/4294/9/, article from Bill Von Hagen). But I did not found the lvm-mod modules neither the LVM programs. So I wrote the enclosed mail to the Super-Rescue mailing list. Meanwhile I looked at some archives of the LVM mailing list and tried back to use the Mandrake CD 1. This is the reason for I am sending this mail to the LVM mailing list too. It is a very Newbie message but I spend a lot of time to get the information. Mandrake 9.1 allows you to directly setup a computer with LVM partitions instead of separated fixed partitions (just do Advance when partitioning or something like that) but the rescue mode is not documented in case of a problem like I got.=20 Before entering Mandrake rescue details below, I also understood the advantage of the multiuser mode with the SuperRescue disk (I was asking the question). The advantage is that with this disk and a network, you can have a complete KDE environment with google access for example, only from the CD and without any mounted disk from your computer (So you can boot Linux from a Windows XP PC or whatever PC OS if you are invited somewhere without your laptop but only this CD!). But back to the Mandrake 9.1 CD 1 (rescue). Here is how you can mount your LVM partitions or restore them if you have had problem. - Boot from CD 1 Mandrake - Type F1 - at boot: type rescue loqdkeys fr # For french keyboard only modprobe lvm-mod # it is on the CD (I haven't found it on the Superrescue disk). =20 - you must have access to vgscan and vgchange and their libraries. In my case my root partition is still an ext3 native partition (/dev/hda3 for example) and is working. So I only have to mount it. mkdir /mnt/root mount -t ext3 /dev/hda3 /mnt/root - then I can activate vgscan /mnt/root/sbin/vgscan and my Volume Group is recognized. /mnt/root/sbin/vgchange -ay and my Logical Volumes are recognized Then I have to setup the network, mount the backup partition on a host and restore (or backup) the partition.=20 Le mar 23/09/2003 =EF=BF=BD 13:19, Brouard Nicolas a =EF=BF=BDcrit : > Hello, >=20 > I have seen on Linux Planet that Superrescue manages LVM (Logical Volume > Manager) partitions. Standard Mandrake 9.1 rescue mode does not seem to > manage them. But I have some problems (I am a newbie) with the rescue > disk. >=20 > My purpose is to save (and restore) partitions and mainly LVM partitions > through the network. >=20 > PART A=20 >=20 > So I booted the rescue disk. > I typed return to be in single mode. >=20 > loadkeys fr # to get a French keyboard > mount # to verify that none of my disk were mounted! >=20 > Then I setup the network with > ifconfig eth0 192.168.0.1 broadcast 192.168.0.255 netmask =20 > 255.255.255.0 > ping 192.168.0.2 > mkdir /mnt/backup # To create a backup directory on RAM for mounting > mount -t nfs 192.168.0.2:/backup /mnt/backup=20 >=20 > dd if=3D/dev/hda5 of=3D/mnt/backup/rootpartbackup bs=3D10M # to backup = my > root partition >=20 > Ok, it worked. There are probably better solutions, but I haven't found > them. In order to allow root nfs on the host server I spent sometime to > get it work. It seems that the /etc/hosts.allow should > include one of these lines (or group of lines for portmap) > #mountd: LOCAL > #ALL: 192.168. > #portmap: 192.168.0.11 > #portmap: 192.168.0.0/255.255.255.0 >=20 > File /etc/exports should be very explictit with the IP.=20 > /backup 192.168.0.0/255.255.255.0(rw,no_root_squash,insecure,sync) >=20 > Then exportfs -rv should be enough > To unmount the backup either it can be suppressed from the exports file > or > exportfs -u localhost:/backup > otherwise it can be umounted. >=20 > PART B >=20 > Now I want to backup my LVM partitions > but modprobe lvm-mod does not work > and vgscan and vgchange -a y (which are the commands that I found in > /etc/rc.d/rc.sysinit) do not work too. >=20 > So I did a CTRL_D to get into multisuer mode.=20 > Then I discovered that I could do an "ifup" to get the network. >=20 > But here I am stuck because I cant find any LVM module or programs. > What is the advantage of the multisuer mode? To get X or something like > that. Sorry but I haven't found a Superrescue Basic Howto. >=20 > Thanks a lot for any comment. >=20 > Nicolas Brouard > brouard@ined.fr > Paris >=20 >=20 > _______________________________________________ > SuperRescue mailing list > SuperRescue@zytor.com > http://www.zytor.com/mailman/listinfo/superrescue > Please do not send private replies to mailing list traffic. --=-rUDS+wjXtq/Foaye5WY8 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit Hi,
I have had problem with my root partition which is often (twice) garbaged by e2fsck with dupplicated file names!
It may also affect the Logical Partitions (/usr, /var, /home, /tmp, swap) if someone says Y for e2fsck. 

So I wanted to have a backup of my root partition both as an additional logical volume and as a backup (250 Mb) on a host from my network.

Doing the backup partition on a host with dd made me angry because I spent time to mount root partition with NFS (see below) in order to suppress the "access denied".

But the main purpose of my search was to have a rescue disk with LVM loaded and ready to use. In a first step, I did not know how to do it with Mandrake CD 1 (rescue disk) and moved to Superrescue which has been described in Linux Planet as being able to do it (http://www.linuxplanet.com/linuxplanet/reports/4294/9/, article from Bill Von Hagen). But I did not found the lvm-mod modules neither the LVM programs. So I wrote the enclosed mail to the Super-Rescue mailing list.

Meanwhile I looked at some archives of the LVM mailing list and tried back to use the Mandrake CD 1.
This is the reason for I am sending this mail to the LVM mailing list too. It is a very Newbie message but I spend a lot of time to get the information.

Mandrake 9.1 allows you to directly setup a computer with LVM partitions instead of separated fixed partitions (just do Advance when partitioning or something like that) but the rescue mode is not documented in case of a problem like I got.

Before entering Mandrake rescue details below, I also understood the advantage of the multiuser mode with the SuperRescue disk (I was asking the question). The advantage is that with this disk and a network, you can have a complete KDE environment with google access for example, only from the CD and without any mounted disk from your computer (So you can boot Linux from a Windows XP PC or whatever PC OS if you are invited somewhere without your laptop but only this CD!).

But back to the Mandrake 9.1 CD 1 (rescue). Here is how you can mount your LVM partitions or restore them if you have had problem.

- Boot from CD 1 Mandrake
- Type F1
- at boot: type rescue
  loqdkeys fr # For french keyboard only
  modprobe lvm-mod # it is on the CD (I haven't found it on the Superrescue disk).
 
- you must have access to vgscan and vgchange and their libraries. In my case my root partition
  is still an ext3 native partition (/dev/hda3 for example) and is working. So I only have to mount it.
  mkdir /mnt/root
  mount  -t ext3 /dev/hda3 /mnt/root

- then I can activate vgscan
  /mnt/root/sbin/vgscan
and my Volume Group is recognized.
  /mnt/root/sbin/vgchange -ay
and my Logical Volumes are recognized

Then I have to setup the network, mount the backup partition on a host and restore (or backup) the partition.

Le mar 23/09/2003 à 13:19, Brouard Nicolas a écrit : 
Hello,

I have seen on Linux Planet that Superrescue manages LVM (Logical Volume
Manager) partitions. Standard Mandrake 9.1 rescue mode does not seem to
manage them. But I have some problems (I am a newbie) with the rescue
disk.

My purpose is to save (and restore) partitions and mainly LVM partitions
through the network.

PART A 

So I booted the rescue disk.
I typed return to be in single mode.

  loadkeys fr  # to get a French keyboard
  mount # to verify that none of my disk were mounted!

Then I setup the network with
  ifconfig eth0 192.168.0.1 broadcast 192.168.0.255 netmask      
255.255.255.0
  ping 192.168.0.2
  mkdir /mnt/backup # To create a backup directory on RAM for mounting
  mount -t nfs 192.168.0.2:/backup /mnt/backup 

  dd if=/dev/hda5 of=/mnt/backup/rootpartbackup bs=10M # to backup my
root partition

Ok, it worked. There are probably better solutions, but I haven't found
them. In order to allow root nfs on the host server I spent sometime to
get it work. It seems that the /etc/hosts.allow should
include one of these lines (or group of lines for portmap)
#mountd: LOCAL
#ALL: 192.168.
#portmap: 192.168.0.11
#portmap: 192.168.0.0/255.255.255.0

File /etc/exports should be very explictit with the IP. 
/backup  192.168.0.0/255.255.255.0(rw,no_root_squash,insecure,sync)

Then exportfs -rv should be enough
To unmount the backup either it can be suppressed from the exports file
or
  exportfs -u localhost:/backup
otherwise it can be umounted.

PART B

Now I want to backup my LVM partitions
but modprobe lvm-mod does not work
and vgscan and vgchange -a y (which are the commands that I found in
/etc/rc.d/rc.sysinit) do not work too.

So I did a CTRL_D to get into multisuer mode. 
Then I discovered that I could do an "ifup" to get the network.

But here I am stuck because I cant find any LVM module or programs.
What is the advantage of the multisuer mode? To get X or something like
that. Sorry but I haven't found a Superrescue Basic Howto.

Thanks a lot for any comment.

Nicolas Brouard
brouard@ined.fr
Paris


_______________________________________________
SuperRescue mailing list
SuperRescue@zytor.com
http://www.zytor.com/mailman/listinfo/superrescue
Please do not send private replies to mailing list traffic.
--=-rUDS+wjXtq/Foaye5WY8--