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Root mirroring in SUSE 10.1

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Operating Systems Linux SuSE Root mirroring in SUSE 10.1
# 1  
Old 12-27-2010
Root mirroring in SUSE 10.1
Hi,

I want to mirror root hard disk in SUSE LINUX 10.1.

I have two 80G hard disks, I searched in google but I did not find any good link to describe this.

Please see below info..
Code:

Server1:~ # df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda6              16G  1.2G   14G   8% /
udev                  1.3G  140K  1.3G   1% /dev
/dev/sda7              59G   33M   59G   1% /home
Server1:~ # sfdisk -d /dev/sda
Warning: extended partition does not start at a cylinder boundary.
DOS and Linux will interpret the contents differently.
# partition table of /dev/sda
unit: sectors

/dev/sda1 : start=       63, size=156232062, Id= f, bootable
/dev/sda2 : start=        0, size=        0, Id= 0
/dev/sda3 : start=        0, size=        0, Id= 0
/dev/sda4 : start=        0, size=        0, Id= 0
/dev/sda5 : start=      126, size=  2104389, Id=82
/dev/sda6 : start=  2104578, size= 31471272, Id=83
/dev/sda7 : start= 33575913, size=122656212, Id=83
Server1:~ #
Server1:~ #
Server1:~ #  sfdisk -d /dev/sdb
# partition table of /dev/sdb
unit: sectors

/dev/sdb1 : start=        0, size=        0, Id= 0
/dev/sdb2 : start=        0, size=        0, Id= 0
/dev/sdb3 : start=        0, size=        0, Id= 0
/dev/sdb4 : start=        0, size=        0, Id= 0
Server1:~ # cat /etc/fstab
/dev/sda6            /                    reiserfs   acl,user_xattr        1 1
/dev/sda7            /home                reiserfs   acl,user_xattr        1 2
/dev/sda5            swap                 swap       defaults              0 0
proc                 /proc                proc       defaults              0 0
sysfs                /sys                 sysfs      noauto                0 0
debugfs              /sys/kernel/debug    debugfs    noauto                0 0
usbfs                /proc/bus/usb        usbfs      noauto                0 0
devpts               /dev/pts             devpts     mode=0620,gid=5       0 0
Server1:~ #

Please help me, I am new to SUSElinux and please give me helpful links.
# 2  
Old 12-27-2010
How did you arrive at that partitioning scheme? Is there any other disk installed in the system (eg. running Windows)? Where is the boot loader installed (check /boot/grub/menu.lst)? Do you have a working backup of any important files on the machine (not only on the Linux disk, but really the complete machine)?
# 3  
Old 12-27-2010
only one instance is installed.
It is a testing machine, so we do not have any important files for now.

So Kindly suggest me procedure.

Thanks
srini
# 4  
Old 12-27-2010
Is this a testing machine based on an production machine, and you want to apply the mirroring procedure to the production machine later? Or is it just for experimenting? If the later, I'd say scrap it and set up mirroring during the installation (less hassle).
# 5  
Old 12-27-2010
Yes exactly ...

I want to replicate this on production server.

Thanks
Srini
# 6  
Old 12-28-2010
Ok, we could go on forth an back for a while now, but I think that would be rather tiresome. So please, post as much information about the systems as possible. Otherwise the probability is very very high that whatever advice we give will screw up your system.

What's the partitioning layout on the production server?
Did you replicate the layout on the test machine?
Is the test machine a physical or virtual one?
Do you only want to mirror the root partition or others too?
Do you, at any point in the foreseeable future, plan to switch to LVM to manage your disks?
What boot loader are you using (Grub, LILO) and where is it installed (MBR, first partition)?
# 7  
Old 12-28-2010
Hi,
Thanks for your reply.

Partition lay out is same on both production and development.
We do not have any plans to migrate to LVM.
Boot loader is grub.
It is a physical machine.
I want to mirror / & boot (Or these separate ? I dont know, My df is not showing separately).


Will you please post reply ASAP.

Thanks
Srini
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