Re: Settings need restoring after reboot - not persistent

Peter Crighton <[email protected]> wrote on 12/29/2006 04:14:14 AM:

> I have successfully installed EVMS 2.5.5 on Centos 4.4 (kernel
> 2.6.9-42.0.3.EL).

> I had to install some -devel packages to get evmsgui going (glib, gtk
> and ncurses).

> I did:
> patch of all current patches for 2.5.5 engine
> ./configure
> make
> make install
> ldconfig

> I did not touch the kernel (prefer not to for simplicity and ease of
> future upgrade and instead to use the workaround of using the kernel's
> drivers for the boot HD and EVMS for my RAID data disks).

> I excluded hda in sysfs_devices in /etc/evms.conf (so it booted
> without a problem).

> I did the following:
> Run evmsgui
> Delete volumes hde & hdg
> Actions - create - region - RAID 1 hde & hdg
> Actions - create - volume md0 from RAID
> Actions - File Systems - Make - Ext2/3 - name md0_vol
> Save
> Backup
> Mounted md0
> Add mount /dev/evms/md0 to fstab

> I could successfully add files to md0 and waited for the resync to
> complete.

> /proc/mdstat indicated no problems.

> When I reboot I cannot see my RAID. /proc/mdstat provides no details.
> Mount /mnt/md0 fails

> I have to run evms_metadata_restore to recover and be able to mount
> them with mount /mnt/md0.

> What have I done wrong/missed?

> There was a message flashed up on re-boot about md0 (still in use?)
> but nothing in /var/log/boot.log
> --

> Peter Crighton

Hi, Peter.

Did you add evms_activate to your init scripts?  When the system is booted,
EVMS must be run to discover the disk configuration and activate the
devices.

I suspect this is the problem.  You can test it by simply running
evms_activate after the system is rebooted.

There should be no need to restore the metadata.  evms_metadata_restore
activates the devices after it has restored the metadata.  I suspect that
in your case it is rewriting the same metadata and then activating the
devices.

If evms_activate doesn't activate the RAID then there is some other
problem.  Let me know and we'll chase it down.

Steve D.


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