After hard update the Raid 1 hdd shown as empty

Ok, never seen this before, so lets's try something

mdadm --assemble /dev/md127 /dev/sdc

after that does it appear under Raid management

Zitat von Triebwerk

Now there is a raid shown, but just with one singe device (sdc) and the name of the drive is /dev/md127.

Does it show as clean/degraded

OK, select the raid by just clicking on it, then on the menu click recover, a dialog box will appear if /dev/sdb is shown select it (a tick will appear in the check box) click ok.

Zitat von Triebwerk

Now it got 2 devices (sdb + sdc) and show a rising percentige of recovering.

when it's finished run omv-mkconf mdadm don't run it before.

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Now both drives are recognized but it seems the data of the drives are gone.

The data is there the shares are missing in OMV that will display the data, use WinSCP or Filexilla if you have Windows and look in /srv

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I used WinSCP and the only content in srv is a ftp folder with a file called welcome.msg nothing else. I don't know why there is a ftp folder, because I never used ftp. Not in the previous version (OMV 2.x) and also not in the actual (OMV 4.x)

Ah! You had a previous running OMV2 and as @votdev pointed out the norm to upgrade was to backup, wipe the drives and recreate the array in OMV4.

I started using OMV from v3 the upgrade to OMV4 was straightforward, I am wondering if the mount point in OMV2 was in a different folder, you need some help from others @macom @ryecoaaron thanks.

Before /srv/ filesystems were mounted in /media/

Zitat von macom

Before /srv/ filesystems were mounted in /media/

Thanks @macom

Zitat von Triebwerk

I get the fear that the data will be lost.

The only way that could happen is if the drives were wiped all you have done (hopefully) is reassemble the raid.

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All I've tried to update OMV in normal ways failed.

You can't update/upgrade OMV unless one is moving from OMV3 to OMV4, there is no upgrade path from OMV2 to OMV4 or even to 5, to move to either of those versions you need to backup, then wipe the drives within OMV's new install, create the shares and move the data back.

What makes no sense is that the raid according to your posts 55 and 56 the raid has successfully reassembled, simply reassembling would not wipe the data, checking using WinSCP or Filezilla you are looking inside the raid mount point (sorry got to ask).