It is recommended to disable all services utilized by openmediavault (e.g.
samba, nfs, etc.) except SSH during the upgrade process.
Re-mounting /srv/dev-disk-by-id-ata-ST31000520AS_5VX086CN-part3 read-only
Remounting is not supported at present. You have to umount volume and then mount it once again.
1. did you follow above advise "disable all services utilized by openmediavault"
2. what file system is used for /srv/dev-disk-by-id-ata-ST31000520AS_5VX086CN-part3