Raid1 one Hard-Drive removed

So, even though you can't create a raid array from the OMV web interface and there are many, many posts telling you not to use raid with usb drives and RPis, you did it anyway? And now, the exact reason we tell people not to use raid on them is happening. There are lots of posts telling you how to force re-assemble the array. If you get it working, please don't continue to use raid.

Zitat von boeserkorn

can you mirror the hard drives with OMV without raid?

Use rsync or rsnapshot for that.
RAID for Geekworm X828 board

Zitat von boeserkorn

can you mirror the hard drives with OMV without raid?

Rsync is built right into OMV.
Go to Scheduled Jobs —> add —> use this command: rsync -av --delete /srv/dev-disk-by-label-SOURCE/ /srv/dev-disk-by-label-DESTINATION/
SOURCE=the name of your main data disk
DESTINATION=the name of your backup drive
Be careful. Don’t get them backwards.
you can set up times so that it will run automatically every day, week, or whatever, or you can leave it off and run it manually. you can also leave the --delete command out if you’re not concerned about files existing on the back up disk that are not still on the source disc.

there is a great guide in the guides section of the forum that explains mirror back ups in a little bit more detail. Go get that and read it. Tons of good information there. It’s called something like getting started.

Zitat von boeserkorn

Now unfortunately one went out (off button) and then turned it back on, unfortunately it is now missing in the raid system and I can no longer get it in.

That's the downside to using USB, just because the drive has been turned back on will not bring the raid back, with both drives on have you tried rebooting the Pi?

Zitat von boeserkorn

or rather a USB hardware raid like this:

Those items are designed for Windows, any Linux distro including OMV will see two drives.

As others have mentioned USB drives are best utilised using rsync as this can be run overnight.

Zitat von cabrio_leo

could it be a reasonable solution for two disks, used seperately as master and backup disk?

Yes it could, in fact I followed the link, available in Germany not in the UK

Personally I like the 'idea' of them as it allows you to have 2, 4, 6 drives in one case with one power supply, rather than x number of drives connected separately using individual power supplies. Would I trust this on a Pi -> No, especially with 3.5" drives. But on those it's not that the Raid functionality is disabled OMV simply doesn't recognise it as a hardware raid controller + if OMV did, you would see the two drives as one with no software to monitor the condition of the drives.