Re: [Evms-devel] EVMS volume rediscovery?

[Kevin C. <co...@us...>]

Hi Xiaoxiang,

You are correct - EVMS discovery is currently totally based on metadata from 
the disks. If you are an existing system with MD/Software RAID devices or LVM 
LVs, you can install EVMS and it will automatically detect them.

As far the device files go, if you are running devfs this will be automatic. 
If you are not running devfs, the first time EVMS discovers something new 
(like in your example), you will need to do one of two things: You can either 
run the EVMS engine (by running "evms" or "evmsgui") and perform a commit, or 
you can run the utility "evms_devnode_fixup". After that all of the active 
volumes will have device files in /dev.

-Kevin


On Thursday 18 April 2002 10:59, Xiaoxiang Liu wrote:
> Hi,
>
> Since EVMS can discover the old Linux LVM volumes and md from the disks,
> I just wonder if EVMS rediscovery is totally based on the metadata saved on
> EVMS
> volumes? That means if I attach a raid with machine A and create some EVMS
> volumes,
> then I disconnect the raid from machine A and make it attached to machine
> B. Can machine B discover all those EVMS volumes one the raid and create
> device file
> descriptors for them?
>
> Thanks,
>
> -- Xiaoxiang