[linux-lvm] Query For MULTIPATH & LVM

[linux-lvm] Query For MULTIPATH & LVM

[Sameer Halgatti]

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Hi All,
I am a new user to LVM.
I have a system with Linux RH 7.2 (Kernel version 2.4.7-10)
The version of LVM, I am using is lvm-1.0.3-4.
I have connected a Storage Machine (SAN) to my host. So I could have multiple paths to any LUN. (e.g sda & sdb are pointing to the same LUN).
So whenever I do "pvcreate" on /dev/sda, PV gets created on /dev/sdb also since they (sda & sdb) are pointing to same disk/LUN.
In such a scenario can I use lvm-1.0.3.4 ??
If not then please give me reasons as well as solution.

Pls REPLY to my QUERY!!!

Thanks & Regards,
Sameer Halgatti


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Re: [linux-lvm] Query For MULTIPATH & LVM

[Heinz J . Mauelshagen]

On Tue, May 20, 2003 at 01:43:04PM +0530, Sameer Halgatti wrote:
> Hi All,
> I am a new user to LVM.
> I have a system with Linux RH 7.2 (Kernel version 2.4.7-10)
> The version of LVM, I am using is lvm-1.0.3-4.
> I have connected a Storage Machine (SAN) to my host. So I could have multiple paths to any LUN. (e.g sda & sdb are pointing to the same LUN).
> So whenever I do "pvcreate" on /dev/sda, PV gets created on /dev/sdb also since they (sda & sdb) are pointing to same disk/LUN.
> In such a scenario can I use lvm-1.0.3.4 ??
> If not then please give me reasons as well as solution.

With LVM1 you can achive multi-pathing with MD (search the Web for raidtools
and raidtab) below LVM _or_ use IBMs multi-path addition which gets shipped
with recent SuSE distros (starting with 8.1).

Sistina's plan is to suport multi-pathing in LVM2.2 later this year.

> 
> Pls REPLY to my QUERY!!!
> 
> Thanks & Regards,
> Sameer Halgatti
> 

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
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