flegarrec Posted January 7, 2014 Share #1 Posted January 7, 2014 Hello, I use DSM4.2 (Trantor release). I recently started to use it for storing all movies and reading them from XBMC on a Windows system via CPL network. I observe strange behavior while reading 1h30 mkv files (with a 10Mb codec). Twice during the movie, the reading stops. I observe in the XBMC machine log and on another one that both detect loss of connectivity to the NAS (ping not responding) which several seconds later is coming back. I looked into the NAS log files, and i found at exactly the time of loss (20h56 and 22h08) those lines: Jan 6 20:56:30 smbd: lib/recvfile.c:201 recvfile failed(-1): Broken pipe, count=[32768] total tx/tx=[11564/11564] rwbytes=[11564/11564] Jan 6 22:08:06 smbd: lib/recvfile.c:201 recvfile failed(-1): Broken pipe, count=[32768] total tx/tx=[10104/10104] rwbytes=[10104/10104] And: smbd/smb2_negprot.c:238: [2014/01/06 22:08:37.003980, syno 0, pid=10358] smbd_smb2_request_process_negprot (smbd/smb2_negprot.c:238) port [445], nbt_port: [139] smbd/smb2_negprot.c:230: [2014/01/06 22:09:16.969594, syno 0, pid=10360] smbd_smb2_request_process_negprot (smbd/smb2_negprot.c:230) protocol[7], max_read: [1048576], max_write: [1048576] smbd/smb2_negprot.c:238: [2014/01/06 22:09:16.969808, syno 0, pid=10360] smbd_smb2_request_process_negprot (smbd/smb2_negprot.c:238) port [445], nbt_port: [139] I checked that port 445 corresponds to Windows usage of the SMB share. Any idea about the reason why i get those? Do i need to upgrade to DSM 4.3 to get rid of it? Thanks in advance for your help. Link to comment Share on other sites More sharing options...
stanza Posted January 7, 2014 Share #2 Posted January 7, 2014 Change your SMB settings from SMB2 large MTU back to normal (eg turn that selection button off) Seems SMB2 uses a lot of CPU to do roughly the same speed throughput I find. try again. . Link to comment Share on other sites More sharing options...
flegarrec Posted January 9, 2014 Author Share #3 Posted January 9, 2014 Thanks, i tried yesterday. The moment i uncheck the box in synology i totally lose the share and can not access it anymore from my windows boxes. So i left it checked. However, i saw that i had a backup of several GB archives launched automatically towards the NAS, in parallel of trying to read the mkv files. I guess it might have been too much for it to sustain. I will try de-activate the backup, and if it works, i will activate it again with lower allocated bandwidth. Anyway, i did not know the SMB2 large MTU thing, thanks for this idea. Link to comment Share on other sites More sharing options...
flegarrec Posted January 22, 2014 Author Share #4 Posted January 22, 2014 Thread replaced by: viewtopic.php?f=2&t=2146 Link to comment Share on other sites More sharing options...
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