[linux-lvm] Software mirror with LVM

[linux-lvm] Software mirror with LVM

[Tan, Hong King]

Greetings,

I am proposing a ML350 server with internal raid and another raid
controller(Smart Array 5302) connected to StorageWorks Enclosure 4314.

The internal raid is configured as RAID 1 across 2 drives and the external
raid is configured as RAID 5 acroos 3 drives. 

Can I use LVM to perform a software mirror between the internal raid and
external raid volumes or I would need 3-party software like Veritas
Foundation Suite for Linux ?

Kindly advise.

Thanks and Regards


Tan Hong King
IT Solutions Specialist

Intergraph Systems Singapore
Web site : www.intergraph.com.sg
Tel:(65)67790177 Ext 263
Fax:(65)67790717
Email:hktan@intergraph.com.sg

Re: [linux-lvm] Software mirror with LVM

[Luca Berra]

On Sat, Sep 06, 2003 at 01:20:12PM +0800, Tan, Hong King wrote:
>Greetings,
>
>I am proposing a ML350 server with internal raid and another raid
>controller(Smart Array 5302) connected to StorageWorks Enclosure 4314.
>
>The internal raid is configured as RAID 1 across 2 drives and the external
>raid is configured as RAID 5 acroos 3 drives. 
>
>Can I use LVM to perform a software mirror between the internal raid and
>external raid volumes or I would need 3-party software like Veritas
>Foundation Suite for Linux ?
>
no you cannot use lvm to do mirroring, you can do striping with it,
or just use space from the two storage to form a single volume group.
I would not mix internal and external storage anyway if i were in you.
if you need the space on a single server buy a server with more slots...


L.

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Luca Berra -- bluca@comedia.it
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Re: [linux-lvm] Software mirror with LVM

[Jon Bendtsen]

Tan, Hong King wrote:
> Greetings,
> 
> I am proposing a ML350 server with internal raid and another raid
> controller(Smart Array 5302) connected to StorageWorks Enclosure 4314.
> 
> The internal raid is configured as RAID 1 across 2 drives and the external
> raid is configured as RAID 5 acroos 3 drives. 
> 
> Can I use LVM to perform a software mirror between the internal raid and
> external raid volumes or I would need 3-party software like Veritas
> Foundation Suite for Linux ?

lvm1 cant be a mirror. LVM2 might have the posibillity, but i wouldnt
use it for production just yet.

Why cant you just use another software raid ontop of that?




JonB