We use unitrends uvb backup system for a vmware cluster. There a 4 storages (1 x OMV, 3 x Synology). The Openmediavault-Storage is formatet with xfs und mountet on the backupsystem by nfs. The Synologys are formatet with ext4 and also mounted by nfs to separate virual backup-appliances. The 3 appliances which use the synology storage are able to make hard links on the storage for a full backup. Only the one uvb appliance which is connected to the OMV Storage failed with the following message: "Failed to create hard link - Operation not permitted". There seems to be a permissions issue, but where?
Failed to create hard link - Operation not permitted on nfs share
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- OMV 2.x
- ncws
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How did you configure the nfs share? if the backup system is running as root that might be the cause.
From the omv terminal post cat /etc/exports and exportfs -v
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root@de215:~# cat /etc/exports
# /etc/exports: the access control list for filesystems which may be exported
# to NFS clients. See exports(5).
/export/65TB (rw,no_root_squash,insecure,rw,sync)
/export/172 192.168.208.0/23(rw,no_root_squash,insecure,rw,sync)
/export/173 192.168.208.0/23(rw,no_root_squash,insecure,rw,sync)
/export/174 192.168.208.0/23(rw,no_root_squash,insecure,rw,sync)
/export/175 192.168.208.0/23(rw,no_root_squash,insecure,rw,sync)# NFSv4 - pseudo filesystem root
/export (ro,fsid=0,root_squash,no_subtree_check,hide)
/export 192.168.208.0/23(ro,fsid=0,root_squash,no_subtree_check,hide)root@de215:~# exportfs -v
/export/172 192.168.208.0/23(rw,wdelay,insecure,no_root_squash,no_subtree_check)
/export/173 192.168.208.0/23(rw,wdelay,insecure,no_root_squash,no_subtree_check)
/export/174 192.168.208.0/23(rw,wdelay,insecure,no_root_squash,no_subtree_check)
/export/175 192.168.208.0/23(rw,wdelay,insecure,no_root_squash,no_subtree_check)
/export 192.168.208.0/23(ro,wdelay,root_squash,no_subtree_check,fsid=0)
/export/65TB <world>(rw,wdelay,insecure,no_root_squash,no_subtree_check)
/export <world>(ro,wdelay,root_squash,no_subtree_check,fsid=0) -
I see no_root_squash there so should be ok. Then are the permissions/uid/gid matching in the remote server against the local mount?
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