I have a Raspberry in which I execute several daemons of type (mldonkey,tor, i2pd...) and it usually goes pretty well, until one day randomly it stops responding. I turn it off and turn it on and I always see the same error in the logs:
ERROR::dwc_otg_hcd_urb_enqueue:505: Not connected
From that error the kernel starts to connect and disconnect things and that's when the Raspberry does not respond.
Aug 16 19:59:43 raspi kernel: [68009.355203] ERROR::dwc_otg_hcd_urb_enqueue:505: Not connected
Aug 16 19:59:43 raspi kernel: [68009.355203] [277/352]
Aug 16 19:59:43 raspi kernel: [68009.596912] usb 1-1: USB disconnect, device number 2
Aug 16 19:59:43 raspi kernel: [68009.596944] usb 1-1.1: USB disconnect, device number 3
Aug 16 19:59:43 raspi kernel: [68009.597343] smsc95xx 1-1.1:1.0 eth0: unregister 'smsc95xx' usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet
Aug 16 19:59:43 raspi kernel: [68009.597521] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
Aug 16 19:59:43 raspi kernel: [68009.627653] usb 1-1.4: USB disconnect, device number 4
Aug 16 19:59:43 raspi kernel: [68009.627683] usb 1-1.4.4: USB disconnect, device number 5
Aug 16 19:59:43 raspi kernel: [68009.627701] usb 1-1.4.4.2: USB disconnect, device number 6
Aug 16 19:59:43 raspi kernel: [68009.629303] EXT4-fs warning (device sda1): ext4_end_bio:329: I/O error -5 writing to inode 2097237 (offset 0 size 0 starting block 40853774)
Aug 16 19:59:43 raspi kernel: [68009.629331] Buffer I/O error on device sda1, logical block 40853509
Aug 16 19:59:43 raspi kernel: [68009.629356] Buffer I/O error on device sda1, logical block 40853510
Aug 16 19:59:43 raspi kernel: [68009.629374] Buffer I/O error on device sda1, logical block 40853511
Aug 16 19:59:43 raspi kernel: [68009.629390] Buffer I/O error on device sda1, logical block 40853512
Aug 16 19:59:43 raspi kernel: [68009.629407] Buffer I/O error on device sda1, logical block 40853513
Aug 16 19:59:43 raspi kernel: [68009.629424] Buffer I/O error on device sda1, logical block 40853514
Aug 16 19:59:43 raspi kernel: [68009.629441] Buffer I/O error on device sda1, logical block 40853515
Aug 16 19:59:43 raspi kernel: [68009.629457] Buffer I/O error on device sda1, logical block 40853516
Aug 16 19:59:43 raspi kernel: [68009.629474] Buffer I/O error on device sda1, logical block 40853517
Aug 16 19:59:43 raspi kernel: [68009.629819] Aborting journal on device sda1-8.
Aug 16 19:59:43 raspi kernel: [68009.629873] JBD2: Error -5 detected when updating journal superblock for sda1-8.
Aug 16 19:59:44 raspi kernel: [68010.132087] sd 0:0:0:0: [sda] Synchronizing SCSI cache
Aug 16 19:59:44 raspi kernel: [68010.132363] sd 0:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=0x01 driverbyte=0x00
Aug 16 19:59:44 raspi kernel: [68010.346976] Indeed it is in host mode hprt0 = 00021501
Aug 16 19:59:44 raspi kernel: [68010.526767] usb 1-1: new high-speed USB device number 7 using dwc_otg
Aug 16 19:59:44 raspi kernel: [68010.527071] Indeed it is in host mode hprt0 = 00001101
Aug 16 19:59:44 raspi kernel: [68010.727215] usb 1-1: New USB device found, idVendor=0424, idProduct=9514
Aug 16 19:59:44 raspi kernel: [68010.727249] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Aug 16 19:59:44 raspi kernel: [68010.731243] hub 1-1:1.0: USB hub found
Aug 16 19:59:44 raspi kernel: [68010.731704] hub 1-1:1.0: 5 ports detected
Aug 16 19:59:45 raspi kernel: [68011.006820] usb 1-1.1: new high-speed USB device number 8 using dwc_otg
Aug 16 19:59:45 raspi kernel: [68011.107300] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00
Aug 16 19:59:45 raspi kernel: [68011.107339] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Aug 16 19:59:45 raspi kernel: [68011.110751] smsc95xx v1.0.4
Aug 16 19:59:45 raspi kernel: [68011.172435] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:d2:9b:57
Aug 16 19:59:45 raspi kernel: [68011.266803] usb 1-1.4: new high-speed USB device number 9 using dwc_otg
Aug 16 19:59:45 raspi kernel: [68011.368445] usb 1-1.4: New USB device found, idVendor=05e3, idProduct=0608
Aug 16 19:59:45 raspi kernel: [68011.368479] usb 1-1.4: New USB device strings: Mfr=0, Product=1, SerialNumber=0
Aug 16 19:59:45 raspi kernel: [68011.368495] usb 1-1.4: Product: USB2.0 Hub
Aug 16 19:59:45 raspi kernel: [68011.370302] hub 1-1.4:1.0: USB hub found
Aug 16 19:59:45 raspi kernel: [68011.370877] hub 1-1.4:1.0: 4 ports detected
Aug 16 19:59:45 raspi kernel: [68011.646695] usb 1-1.4.4: new high-speed USB device number 10 using dwc_otg
Aug 16 19:59:45 raspi kernel: [68011.748157] usb 1-1.4.4: New USB device found, idVendor=05e3, idProduct=0608
Aug 16 19:59:45 raspi kernel: [68011.748187] usb 1-1.4.4: New USB device strings: Mfr=0, Product=1, SerialNumber=0
Aug 16 19:59:45 raspi kernel: [68011.748203] usb 1-1.4.4: Product: USB2.0 Hub
Aug 16 19:59:45 raspi kernel: [68011.749792] hub 1-1.4.4:1.0: USB hub found
Aug 16 19:59:45 raspi kernel: [68011.750218] hub 1-1.4.4:1.0: 4 ports detected
Aug 16 19:59:46 raspi kernel: [68012.026762] usb 1-1.4.4.2: new high-speed USB device number 11 using dwc_otg
Aug 16 19:59:46 raspi kernel: [68012.128949] usb 1-1.4.4.2: New USB device found, idVendor=0480, idProduct=a208
Aug 16 19:59:46 raspi kernel: [68012.128979] usb 1-1.4.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 16 19:59:46 raspi kernel: [68012.128996] usb 1-1.4.4.2: Product: External USB 3.0
Aug 16 19:59:46 raspi kernel: [68012.129012] usb 1-1.4.4.2: Manufacturer: TOSHIBA
Aug 16 19:59:46 raspi kernel: [68012.129027] usb 1-1.4.4.2: SerialNumber: 20160107070195
Aug 16 19:59:46 raspi kernel: [68012.130759] usb-storage 1-1.4.4.2:1.0: USB Mass Storage device detected
Aug 16 19:59:46 raspi kernel: [68012.132003] scsi host1: usb-storage 1-1.4.4.2:1.0
Aug 16 19:59:46 raspi kernel: [68012.519522] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
Aug 16 19:59:46 raspi kernel: [68012.519830] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Aug 16 19:59:47 raspi kernel: [68013.131474] scsi 1:0:0:0: Direct-Access TOSHIBA External USB 3.0 5438 PQ: 0 ANSI: 6
Aug 16 19:59:47 raspi kernel: [68013.133021] sd 1:0:0:0: Attached scsi generic sg0 type 0
Aug 16 19:59:47 raspi kernel: [68013.135201] sd 1:0:0:0: [sdb] 3907029164 512-byte logical blocks: (2.00 TB/1.82 TiB)
Aug 16 19:59:47 raspi kernel: [68013.137088] sd 1:0:0:0: [sdb] Write Protect is off
Aug 16 19:59:47 raspi kernel: [68013.137126] sd 1:0:0:0: [sdb] Mode Sense: 23 00 00 00
Aug 16 19:59:47 raspi kernel: [68013.137810] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Aug 16 19:59:48 raspi kernel: [68013.955366] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Aug 16 19:59:48 raspi kernel: [68013.957382] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
Aug 16 19:59:51 raspi kernel: [68017.750622] sdb: sdb1
Aug 16 19:59:51 raspi kernel: [68017.757766] sd 1:0:0:0: [sdb] Attached SCSI disk
Aug 16 20:06:28 raspi kernel: [68414.531360] EXT4-fs error (device sda1): ext4_find_entry:1451: inode #2097153: comm mlnet: reading directory lblock 0
Aug 16 20:06:34 raspi kernel: [68420.200694] EXT4-fs error (device sda1): ext4_find_entry:1451: inode #2097156: comm mlnet: reading directory lblock 0
Aug 16 20:06:36 raspi kernel: [68422.725323] EXT4-fs error (device sda1): ext4_find_entry:1451: inode #2097156: comm mlnet: reading directory lblock 0
Aug 16 20:07:00 raspi kernel: [68446.800855] smsc95xx 1-1.1:1.0 eth0: link down
Aug 16 20:07:04 raspi kernel: [68450.672131] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
At Raspberry I only have connected a usb hub with independent power and to that same hub a hard disk for usb. Any clue how to deal with the problem?