Re: [linux-lvm] Simulating LVM Mirror Failure and recovery

[yogeen honnavar <yogeen@yahoo.com>]

hi all,

Thanks for all the replies. as pointed out by Eric brunson i was referring to the following document

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Cluster_Logical_Volume_Manager/mirrorrecover.html 

i used the below command to simulate failed sda and then wrote some data to the mounted file system to trigger LVM conversion to linear mode.

# echo offline > /sys/block/sda/device/state 

thanks to all.
regards
-yogeen

--- On Thu, 16/4/09, Takahiro Yasui <tyasui@redhat.com> wrote:

> From: Takahiro Yasui <tyasui@redhat.com>
> Subject: Re: [linux-lvm] Simulating LVM Mirror Failure and recovery
> To: "LVM general discussion and development" <linux-lvm@redhat.com>
> Date: Thursday, 16 April, 2009, 9:32 PM
> malahal@us.ibm.com
> wrote:
> > I usually run "echo 1 >
> /sys/block/sda/device/delete" to make /dev/sda
> > disappear and fail for LVM tests. You can fail the
> disk in a lot of ways
> > depending on your hardware, but this trick works with
> almost every
> > device!
> 
> # echo offline > /sys/block/sda/device/state
> 
> might work as well. In this case, you can recover the
> failure by
> 
> # echo running > /sys/block/sda/device/state
> 
> Thanks,
> Taka
> 
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> 


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