Hmm, bis jetzt keinerlei Reaktion auf meinen Hilferuft und das in einem deutschsprachigem Qnap Forum, dann werde ich mal selber die Lösung des USB-Problems hier posten, hilft vieleicht auch andernen Membern weiter!
Einfach das Benutzerkonto löschen und dann neu anlegen und schon wird die HDD am USB-Anschluß wieder erkannt.
Hallo,
mein TS-659 Pro+ zeigt neuerdings im Web-Dateimanager kein angeschlossenes USB-Laufwerk, bzw.USB-Stick an, im Admin-Panel wird der externe Externer Speicher richtig erkannt und mit dem Status : Bereit angezeigt.
Um das NAS neu aufsetzen zu können, müsste ich vorher erstmal die 7 TByte Daten irgendwo sichern, was mangels Platz und ohnen USB-Laufwerke eine Langwierige Angelegenheit wäre.
Ich vermute mal, das der USB-Treiber nicht gestartet wird, kann man das irgendwie wieder ans laufen bekommen. 
Über Hilfe bei dem Problem wäre ich sehr Dankbar.
# dmesg
21.921892] EXT3-fs (sdf1): mounted filesystem with writeback data mode
[ 22.182946] md: md9 stopped.
[ 22.278457] md: bind<sdb1>
[ 22.278712] md: bind<sdc1>
[ 22.278941] md: bind<sdd1>
[ 22.279175] md: bind<sde1>
[ 22.279410] md: bind<sdf1>
[ 22.279640] md: bind<sda1>
[ 22.281265] raid1: raid set md9 active with 6 out of 6 mirrors
[ 22.285525] md9: bitmap initialized from disk: read 5/5 pages, set 0 bits
[ 22.285630] created bitmap (65 pages) for device md9
[ 22.295865] md9: detected capacity change from 0 to 542769152
[ 22.299855] md9: unknown partition table
[ 22.577021] Retry 20 times(20 seconds),host_no = 1 is not empty to plug in.
[ 23.335165] kjournald starting. Commit interval 5 seconds
[ 23.370218] EXT3-fs (md9): using internal journal
[ 23.370401] EXT3-fs (md9): mounted filesystem with writeback data mode
[ 23.605610] md: md13 stopped.
[ 23.892202] md: bind<sdb4>
[ 23.892463] md: bind<sdc4>
[ 23.892700] md: bind<sdd4>
[ 23.892930] md: bind<sde4>
[ 23.893181] md: bind<sdf4>
[ 23.893433] md: bind<sda4>
[ 23.895018] raid1: raid set md13 active with 6 out of 6 mirrors
[ 23.898721] md13: bitmap initialized from disk: read 4/4 pages, set 0 bits
[ 23.898828] created bitmap (57 pages) for device md13
[ 23.925333] md13: detected capacity change from 0 to 469893120
[ 23.929310] md13: unknown partition table
[ 25.486018] kjournald starting. Commit interval 5 seconds
[ 25.486029] EXT3-fs (md9): warning: maximal mount count reached, running e2fsck is recommended
[ 25.547881] EXT3-fs (md9): using internal journal
[ 25.548054] EXT3-fs (md9): mounted filesystem with writeback data mode
[ 45.607357] kjournald starting. Commit interval 5 seconds
[ 45.607377] EXT3-fs (md9): warning: maximal mount count reached, running e2fsck is recommended
[ 46.047646] EXT3-fs (md9): using internal journal
[ 46.047820] EXT3-fs (md9): mounted filesystem with writeback data mode
[ 70.500879] kjournald starting. Commit interval 5 seconds
[ 70.735144] EXT3-fs (md13): using internal journal
[ 70.735350] EXT3-fs (md13): mounted filesystem with writeback data mode
[ 80.512982] cryptodev: driver 0.9 loaded.
[ 80.536179] usbcore: registered new interface driver hiddev
[ 80.540584] usbcore: registered new interface driver usbhid
[ 80.540716] usbhid: USB HID core driver
[ 80.544085] Register ICH/PCH RTC driver.
[ 80.549338] iTCO_vendor_support: vendor-support=0
[ 80.554207] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.05
[ 80.554989] iTCO_wdt: Found a ICH9R TCO device (Version=2, TCOBASE=0x0860)
[ 80.559061] iTCO_wdt: initialized. heartbeat=120 sec (nowayout=0)
[ 80.565985] usbcore: registered new interface driver usblp
[ 80.571907] ufsd: module license 'Commercial product' taints kernel.
[ 80.572047] Disabling lock debugging due to kernel taint
[ 80.594523] ufsd: driver 8.3 (Jun 15 2012 03:53:57) with acl LBD=OFF with ioctl loaded at ffffffffa00ac000
[ 80.594528] NTFS read/write support included
[ 80.594530] Hfs+/HfsX read/write support included
[ 80.618879] fnotify: Load file notify kernel module.
[ 80.619339] fnotify: Global_Private_Data_List_Init()
[ 80.619498] fnotify: Launch the fnotify thread: 2448
[ 80.620971] fnotify: The fnotify thread starts...
[ 81.680617] usbcore: registered new interface driver snd-usb-audio
[ 81.690113] usbcore: registered new interface driver snd-usb-caiaq
[ 81.722642] pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 81.722764] pci 0000:00:02.0: setting latency timer to 64
[ 81.736428] alloc irq_desc for 35 on node -1
[ 81.736436] alloc kstat_irqs on node -1
[ 81.736450] pci 0000:00:02.0: irq 35 for MSI/MSI-X
[ 81.736807] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[ 81.758983] Linux video capture interface: v2.00
[ 81.778250] usbcore: registered new interface driver uvcvideo
[ 81.778381] USB Video Class driver (v0.1.0)
[ 81.922990] 802.1Q VLAN Support v1.8 Ben Greear <greearb@candelatech.com>
[ 81.923144] All bugs added by David S. Miller <davem@redhat.com>
[ 84.862700] kjournald starting. Commit interval 5 seconds
[ 84.870184] EXT3-fs (md9): using internal journal
[ 84.870353] EXT3-fs (md9): mounted filesystem with writeback data mode
[ 84.973170] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
[ 86.977610] active port 0 :139
[ 86.977711] active port 1 :445
[ 86.977806] active port 2 :20
[ 92.432808] md: bind<sda2>
[ 92.434354] raid1: raid set md6 active with 1 out of 1 mirrors
[ 92.434510] md6: detected capacity change from 0 to 542769152
[ 93.439491] md6: unknown partition table
[ 95.504665] Adding 530040k swap on /dev/md6. Priority:-1 extents:1 across:530040k
[ 101.042827] md: bind<sdb2>
[ 101.054707] RAID1 conf printout:
[ 101.054823] --- wd:1 rd:2
[ 101.054931] disk 0, wo:0, o:1, dev:sda2
[ 101.055042] disk 1, wo:1, o:1, dev:sdb2
[ 101.055302] md: recovery of RAID array md6
[ 101.055427] md: minimum _guaranteed_ speed: 5000 KB/sec/disk.
[ 101.055583] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for recovery.
[ 101.055752] md: using 128k window, over a total of 530048 blocks.
[ 103.181405] md: bind<sdc2>
[ 104.919576] md: md0 stopped.
[ 104.931800] md: md0 stopped.
[ 105.394088] md: bind<sdd2>
[ 105.496334] md: bind<sdb3>
[ 105.496591] md: bind<sdc3>
[ 105.496827] md: bind<sdd3>
[ 105.497056] md: bind<sde3>
[ 105.497289] md: bind<sdf3>
[ 105.497520] md: bind<sda3>
[ 105.498964] raid5: device sda3 operational as raid disk 0
[ 105.499070] raid5: device sde3 operational as raid disk 4
[ 105.499175] raid5: device sdd3 operational as raid disk 3
[ 105.499285] raid5: device sdc3 operational as raid disk 2
[ 105.499385] raid5: device sdb3 operational as raid disk 1
[ 105.510713] raid5: allocated 85344kB for md0
[ 105.510918] 0: w=1 pa=0 pr=5 m=1 a=2 r=5 op1=0 op2=0
[ 105.511046] 4: w=2 pa=0 pr=5 m=1 a=2 r=5 op1=0 op2=0
[ 105.511150] 3: w=3 pa=0 pr=5 m=1 a=2 r=5 op1=0 op2=0
[ 105.511248] 2: w=4 pa=0 pr=5 m=1 a=2 r=5 op1=0 op2=0
[ 105.511352] 1: w=5 pa=0 pr=5 m=1 a=2 r=5 op1=0 op2=0
[ 105.511453] raid5: raid level 5 set md0 active with 5 out of 5 devices, algorithm 2
[ 105.511602] RAID5 conf printout:
[ 105.511692] --- rd:5 wd:5
[ 105.511781] disk 0, o:1, dev:sda3
[ 105.512706] disk 1, o:1, dev:sdb3
[ 105.512797] disk 2, o:1, dev:sdc3
[ 105.512888] disk 3, o:1, dev:sdd3
[ 105.512978] disk 4, o:1, dev:sde3
[ 105.527529] md0: bitmap initialized from disk: read 15/15 pages, set 3 bits
[ 105.527642] created bitmap (233 pages) for device md0
[ 105.550739] md0: detected capacity change from 0 to 7995169177600
[ 106.622663] md0: unknown partition table
[ 107.485664] md: bind<sde2>
[ 109.631727] md: bind<sdf2>
[ 109.769851] EXT4-fs (md0): mounted filesystem with ordered data mode
[ 115.425511] md: md6: recovery done.
[ 115.475836] RAID1 conf printout:
[ 115.475943] --- wd:2 rd:2
[ 115.476034] disk 0, wo:0, o:1, dev:sda2
[ 115.476128] disk 1, wo:0, o:1, dev:sdb2
[ 125.589352] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
[ 136.250121] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
[ 158.753035] active port 0 :139
[ 158.753133] active port 1 :445
[ 158.753224] active port 2 :20
[ 158.804757] warning: `proftpd' uses 32-bit capabilities (legacy support in use)
[ 194.748206] rule type=2, num=0
[ 197.893814] ufsd: sdi1 without journal
[ 203.887417] Loading iSCSI transport class v2.0-871.
[ 203.978572] iscsi: registered transport (tcp)
[ 210.114132] active port 0 :139
[ 210.114236] active port 1 :445
[ 210.114337] active port 2 :20
#Gruß Wolfgang