> Given your kernel log message I would expect seeing the reconnecting happen.
I scheduled a tshark -c over night and was able to get it to run
within minutes of the reconnect attempts.It seems pretty consistent,
about 2 hours after the start of the cron the Error -11's start to
happen. Last night it also happened about 30 minutes into the job:
May 11 23:47:51 localworkstation kernel: CIFS VFS: Server drobo-rh has
not responded in 120 seconds. Reconnecting...
May 11 23:49:59 localworkstation kernel: CIFS VFS: Server drobo-rh has
not responded in 120 seconds. Reconnecting...
May 11 23:52:57 localworkstation kernel: CIFS VFS: Server drobo-rh has
not responded in 120 seconds. Reconnecting...
May 12 01:19:44 localworkstation cupsd: REQUEST localhost - - "POST /
HTTP/1.1" 200 181 Renew-Subscription successful-ok
May 12 01:21:20 localworkstation kernel: CIFS VFS: sends on sock
ffff9f2817bede00 stuck for 15 seconds
May 12 01:21:20 localworkstation kernel: CIFS VFS: Error -11 sending
data on socket to server
Here's the tshark -r tshark.pcap -Y 'smb||smb2' results from 2 files:
593 0.273687063 drobo → localserver SMB 117 [TCP ACKed unseen
segment] Write AndX Response, 65536 bytes
666 0.282264835 drobo → localserver SMB 117 Write AndX Response, 65536 bytes
8 0.136979937 drobo → localserver SMB 117 [TCP ACKed unseen
segment] [TCP Previous segment not captured] Write AndX Response,
65536 bytes
36 0.142752037 drobo → localserver SMB 117 Write AndX Response, 65536 bytes
63 0.149017707 drobo → localserver SMB 117 Write AndX Response, 65536 bytes
> I would wrap your backup script like so to get the right capture:
>
> capfile="$(date -Ihours)"
> tcpdump -w "$capfile" port 445 &
> cappid=$!
> sleep 2
> .....<your script>....
> sleep 2
> kill -6 $cappid
OK just did that and started running the backup manually so far I've
seen variations/multiples of these (cut for easier reading):
38735 18.521926 localserver → drobo SMB 10202 Write AndX Request,
FID: 0x1fca, 65536 bytes at offset 87949312[TCP segment of a
reassembled PDU]
38760 18.527189 localserver → drobo SMB 7306 Write AndX Request, FID:
0x1fca, 65536 bytes at offset 88014848[TCP segment of a reassembled
PDU]
38771 18.529817 drobo → localserver SMB 117 Write AndX Response, FID:
0x1fca, 65536 bytes
44079 19.615349 drobo → localserver SMB 117 [TCP ACKed unseen
segment] Write AndX Response, 65536 bytes
44102 19.626642 drobo → localserver SMB 117 [TCP ACKed unseen
segment] Write AndX Response, 65536 bytes
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