[Vu+Duo] Problem with recording to NFS NAS mount

Hi,

I have problem with OpenPli 3.0 and recording to my Qnap TS-419P+ NAS. quite regularly there are few second glitches in HD recordings.
I do not have any issues in the live viewing. The mount parameters in use are:
(rw,noatime,vers=3,rsize=65536,wsize=65536,namlen=255,hard,nolock,proto=tcp,port=65535,timeo=70,retrans=3,sec=sys,local_lock=all)

The enigma2 log shows the following error message repeating when this is occurring:
[eFilePushThreadRecorder] Warning: All write buffers busy
[eDVBRecordFileThread] Waiting for I/O to complete
[eFilePushThreadRecorder] Warning: All write buffers busy
[eDVBRecordFileThread] Waiting for I/O to complete
[eFilePushThreadRecorder] Warning: All write buffers busy
[eDVBRecordFileThread] Waiting for I/O to complete
[eFilePushThreadRecorder] Warning: All write buffers busy
[eDVBRecordFileThread] Waiting for I/O to complete
[eFilePushThreadRecorder] Warning: All write buffers busy
[eDVBRecordFileThread] Waiting for I/O to complete


Any suggestions what I could do to fix this?