Symptoms

End users complained about data loss, or the file system became read-only.Further troubleshooting showed that the replication destination was promoted by mistake and took over the CIFS and NFS traffic.In some situations, this symptom may disappear automatically after a period of time, and then came back again later.

Cause

The replDest flag of the destination NAS server was set to no by mistake: uemcli -u admin -securePassword /net/nas/server -id nas_x set -replDest no When the destination NAS server came up, it broadcast the MAC address and took over the traffic from the production. End users started to access the read-only destination file systems. After a period of time, when the clients and routers refresh their ARP tables, the production NAS server may take back the traffic automatically.

Resolution

Remove/override the IP address at the destination NAS server, or set the replDest flag back. uemcli -u admin -securePassword /net/nas/server -id nas_x set -replDest yes

Support Cases