Just upgraded from an RT-N66U to an RT-AC68U HW REV A2 with this firmware 380.59 and been having troubles with an external hard disk.
I've tried with the option "Reducing USB 3.0 interference" enabled and disabled and also connecting the hard disk to the USB 2.0 port but he stops responding to samba requests and also to DLNA requests.
The log when I plug the router and access the Samba I get the following log:
"Jun 19 12:23:30 kernel: usb 1-1: new SuperSpeed USB device using xhci_hcd and address 2
Jun 19 12:23:30 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jun 19 12:23:30 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jun 19 12:23:30 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jun 19 12:23:30 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jun 19 12:23:30 kernel: xhci_hcd 0000:00:0c.0: disable burst on ep 1
Jun 19 12:23:30 kernel: xhci_hcd 0000:00:0c.0: WARN no SS endpoint bMaxBurst
Jun 19 12:23:30 kernel: xhci_hcd 0000:00:0c.0: disable burst on ep 2
Jun 19 12:23:30 kernel: xhci_hcd 0000:00:0c.0: WARN no SS endpoint bMaxBurst
Jun 19 12:23:30 kernel: scsi0 : usb-storage 1-1:1.0
Jun 19 12:23:31 kernel: scsi 0:0:0:0: Direct-Access ST3000DM 001-1CH166 CC47 PQ: 0 ANSI: 6
Jun 19 12:23:31 kernel: sd 0:0:0:0: Attached scsi generic sg0 type 0
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
Jun 19 12:23:31 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jun 19 12:23:31 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] Write Protect is off
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
Jun 19 12:23:31 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jun 19 12:23:31 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jun 19 12:23:31 kernel: sda: sda1 sda2
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
Jun 19 12:23:31 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jun 19 12:23:31 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jun 19 12:23:31 kernel: sd 0:0:0:0: [sda] Attached SCSI disk
Jun 19 12:23:31 hotplug[1301]: USB /dev/sda1(unknown) failed to mount at the first try!
Jun 19 12:23:31 usb: USB /dev/sda1(unknown) failed to mount At the first try!
Jun 19 12:23:31 kernel: tfat: fail_safe is enabled
Jun 19 12:23:31 kernel: tntfs info (device sda1, pid 1310): ntfs_fill_super(): fail_safe is enabled
Jun 19 12:23:32 hotplug[1299]: USB /dev/sda2(ntfs) failed to mount at the first try!
Jun 19 12:23:32 usb: USB /dev/sda2(ntfs) failed to mount At the first try!
Jun 19 12:23:32 kernel: tntfs info (device sda2, pid 1334): ntfs_fill_super(): fail_safe is enabled
Jun 19 12:23:32 kernel: tntfs info (device sda2, pid 1334): load_system_files(): NTFS volume name 'Verbatim HDD', version 3.1 (cluster_size 4096, PAGE_CACHE_SIZE 4096).
Jun 19 12:23:33 syslog: USB ntfs fs at /dev/sda2 mounted on /tmp/mnt/Verbatim_HDD
Jun 19 12:23:33 usb: USB ntfs fs at /dev/sda2 mounted on /tmp/mnt/Verbatim_HDD.
Jun 19 12:23:33 rc_service: hotplug 1299:notify_rc restart_nasapps
Jun 19 12:23:34 iTunes: daemon is stopped
Jun 19 12:23:34 FTP Server: daemon is stopped
Jun 19 12:23:34 Samba Server: smb daemon is stopped
Jun 19 12:23:34 kernel: gro disabled
Jun 19 12:23:35 Timemachine: daemon is stopped
Jun 19 12:23:35 miniupnpd[720]: shutting down MiniUPnPd
Jun 19 12:23:35 kernel: gro enabled with interval 2
Jun 19 12:23:37 Samba Server: daemon is started
Jun 19 12:23:37 kernel: RPC: Registered udp transport module.
Jun 19 12:23:37 kernel: RPC: Registered tcp transport module.
Jun 19 12:23:37 kernel: RPC: Registered tcp NFSv4.1 backchannel transport module.
Jun 19 12:23:37 kernel: Installing knfsd (copyright (C) 1996
okir@monad.swb.de).
Jun 19 12:23:37 statd[1387]: Version 1.1.6 Starting
Jun 19 12:23:37 statd[1387]: statd running as root. chown /var/lib/nfs/sm to choose different user
Jun 19 12:23:37 kernel: svc: failed to register lockdv1 RPC service (errno 97).
Jun 19 12:23:39 miniupnpd[1402]: HTTP listening on port 35966
Jun 19 12:23:39 miniupnpd[1402]: Listening for NAT-PMP/PCP traffic on port 5351
Jun 19 12:24:58 kernel: __find_get_block_slow() failed. block=5517221896, b_blocknr=1222254600
Jun 19 12:24:58 kernel: b_state=0x00000020, b_size=512
Jun 19 12:24:58 kernel: device blocksize: 512
Jun 19 12:24:58 kernel: __find_get_block_slow() failed. block=5517221896, b_blocknr=1222254600
Jun 19 12:24:58 kernel: b_state=0x00000020, b_size=512
Jun 19 12:24:58 kernel: device blocksize: 512"
This last part with of kernel log repeats itself lots of time when we try to access samba.
On the top activity I get samba consuming the bigger part of CPU:
Mem: 102552K used, 153148K free, 0K shrd, 1080K buff, 40400K cached
CPU: 2.2% usr 50.6% sys 0.0% nic 46.1% idle 0.0% io 0.0% irq 0.8% sirq
Load average: 4.01 3.15 1.89 3/105 2616
PID PPID USER STAT VSZ %VSZ CPU %CPU COMMAND
1486 1374 nobody R 5976 2.3 1 22.9 /usr/sbin/smbd -D -s /etc/smb.conf
1733 1374 nobody R 5972 2.3 1 22.9 /usr/sbin/smbd -D -s /etc/smb.conf
282 2 admin SW 0 0.0 1 3.9 [kworker/1:1]
355 1 admin S 1384 0.5 0 0.7 /sbin/klogd -c 5
449 1 admin S 6568 2.5 0 0.2 httpd -i br0
742 741 admin S 2032 0.7 0 0.2 wred -B
When checking on the GUI the CPU 2 is at 100% and when I try to access samba again it says on windows explorer that "Insuficient resources exist to complete the requested service".
After this happens the router gets very slow and after a short while it hangs and stops responding to requests from wired and wireless connections.
I also get the following error on dlna log:
"[2016/06/16 07:47:37] scanner.c:615: error: Error creating SQLite3 database!
[2016/06/16 07:47:37] minidlna.c:385: fatal: ERROR: Failed to create sqlite database! Exiting...
[2016/06/19 12:23:41] minidlna.c:1205: warn: Starting MiniDLNA version 1.1.5.
[2016/06/19 12:23:42] minidlna.c:363: warn: Creating new database at /tmp/mnt/Verbatim_HDD/.minidlna/files.db
[2016/06/19 12:23:42] sql.c:41: error: SQL ERROR 1 [table OBJECTS already exists]
CREATE TABLE OBJECTS (ID INTEGER PRIMARY KEY AUTOINCREMENT, OBJECT_ID TEXT UNIQUE NOT NULL, PARENT_ID TEXT NOT NULL, REF_ID TEXT DEFAULT NULL, CLASS TEXT NOT NULL, DETAIL_ID INTEGER DEFAULT NULL, NAME TEXT DEFAULT NULL);
[2016/06/19 12:23:42] scanner.c:615: error: Error creating SQLite3 database!
[2016/06/19 12:23:42] minidlna.c:385: fatal: ERROR: Failed to create sqlite database! Exiting..."
This is very strange as this disk has been working perfectly on the RT-N66U with John's fork for some years.
Can anyone help?