Mirroring disk and LVM

Hi All,

I am newbie to LVM. Basically I have a system installed with RedHat8.0
with LVM.

I want to mirror the root drive with new disk. How can I do this using
LVM? I tried to look into How-to-LVM, it describes about LVM and
extension of LVM but not about mirroring?

do you guys have any suggestions regarding this?(links, commands etc?)

Thanks
Jaysheel

jaysheelmehd@hotmail.com (Jaysheel Mehd) wrote in message news:<75fe20e0.0307081206.64904f6e@posting.google. com>...
> Hi All,
>
> I am newbie to LVM. Basically I have a system installed with RedHat8.0
> with LVM.
>
> I want to mirror the root drive with new disk. How can I do this using
> LVM? I tried to look into How-to-LVM, it describes about LVM and
> extension of LVM but not about mirroring?
>
> do you guys have any suggestions regarding this?(links, commands etc?)
>
> Thanks
> Jaysheel

There is some good information on "the internet". My friend and I use
a search engine called "google" to find things like this. Here is the
url:

http://www.google.com

I did a search using "google" with your question as the basis, and it
told me that I need a thing called "RAID-1" to do this "disk mirror".
It also told me that RedHat have an option to configure RAID during
setup.

I can use the RAID-1 but my problem is I have installed the operating
system using LVM and without using mirror disk.

Now I have the volume group but it is not an md device. I want to now
create a mirror without reinstalling the operating system and
configure the LVM and mirror both.

Thanks
Jaysheel

Xyerp@hotmail.com (Xyerp) wrote in message news:<3d7bc779.0307090226.3cb47b22@posting.google. com>...
> jaysheelmehd@hotmail.com (Jaysheel Mehd) wrote in message news:<75fe20e0.0307081206.64904f6e@posting.google. com>...
> > Hi All,
> >
> > I am newbie to LVM. Basically I have a system installed with RedHat8.0
> > with LVM.
> >
> > I want to mirror the root drive with new disk. How can I do this using
> > LVM? I tried to look into How-to-LVM, it describes about LVM and
> > extension of LVM but not about mirroring?
> >
> > do you guys have any suggestions regarding this?(links, commands etc?)
> >
> > Thanks
> > Jaysheel
>
> There is some good information on "the internet". My friend and I use
> a search engine called "google" to find things like this. Here is the
> url:
>
> http://www.google.com
>
> I did a search using "google" with your question as the basis, and it
> told me that I need a thing called "RAID-1" to do this "disk mirror".
> It also told me that RedHat have an option to configure RAID during
> setup.

Xyerp@hotmail.com (Xyerp) wrote in message news:<3d7bc779.0307090226.3cb47b22@posting.google. com>...
> jaysheelmehd@hotmail.com (Jaysheel Mehd) wrote in message news:<75fe20e0.0307081206.64904f6e@posting.google. com>...
> > Hi All,
> >
> > I am newbie to LVM. Basically I have a system installed with RedHat8.0
> > with LVM.
> >
> > I want to mirror the root drive with new disk. How can I do this using
> > LVM? I tried to look into How-to-LVM, it describes about LVM and
> > extension of LVM but not about mirroring?
> >
> > do you guys have any suggestions regarding this?(links, commands etc?)
> >
> > Thanks
> > Jaysheel
>
> There is some good information on "the internet". My friend and I use
> a search engine called "google" to find things like this. Here is the
> url:
>
> http://www.google.com
>
> I did a search using "google" with your question as the basis, and it
> told me that I need a thing called "RAID-1" to do this "disk mirror".
> It also told me that RedHat have an option to configure RAID during
> setup.

Here is a better answer than the previous "search google" quote.


http://unthought.net/Software-RAID.H...-4.html#ss4.14

This section gives the basis for converting an existing system (non raid) to raid.

"Jaysheel Mehd" <jaysheelmehd@hotmail.com> wrote in message
news:75fe20e0.0307090611.77754b14@posting.google.c om...
| I can use the RAID-1 but my problem is I have installed the operating
| system using LVM and without using mirror disk.
|
| Now I have the volume group but it is not an md device. I want to now
| create a mirror without reinstalling the operating system and
| configure the LVM and mirror both.
|
| Thanks
| Jaysheel
|
| Xyerp@hotmail.com (Xyerp) wrote in message
news:<3d7bc779.0307090226.3cb47b22@posting.google. com>...
| > jaysheelmehd@hotmail.com (Jaysheel Mehd) wrote in message
news:<75fe20e0.0307081206.64904f6e@posting.google. com>...
| > > Hi All,
| > >
| > > I am newbie to LVM. Basically I have a system installed with RedHat8.0
| > > with LVM.
| > >
| > > I want to mirror the root drive with new disk. How can I do this using
| > > LVM? I tried to look into How-to-LVM, it describes about LVM and
| > > extension of LVM but not about mirroring?
| > >
| > > do you guys have any suggestions regarding this?(links, commands etc?)
| > >
| > > Thanks
| > > Jaysheel
| >
| > There is some good information on "the internet". My friend and I use
| > a search engine called "google" to find things like this. Here is the
| > url:
| >
| > http://www.google.com
| >
| > I did a search using "google" with your question as the basis, and it
| > told me that I need a thing called "RAID-1" to do this "disk mirror".
| > It also told me that RedHat have an option to configure RAID during
| > setup.

It is not recommended that you use LVM and Software RAID together. There are
many reports of failure and unreliability in this configuration. This is
assuming you are using LVM on top of RAID.

ken k