[Bug 216282] usb-mass storage

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216282

--- Comment #3 from audioprof2001@yahoo.com ---
When you Turn-on the USB3.0 to SATA controller,
electrons travel near the speed of light.

Kernel interupts the CPU very fast, betwenn 1GHz and 2.8Ghz
to detect & load drivers.

BUT... the Mechanical HDD needs time to spin-up, when is turned-on,
time to reach operating speed of 7200rpm,
Large 3.5" HDD eat more than 3Amps at 12volts dc to spin-up.

USB Mass Storage Needs a Delay, an interrupt wait to read from the controller,
wait to initialize, until HDD had enough time to spin-up and read basic info,
like Name, File system, etc...

Like the Turtle vs. Rabbit Tale.

-------------


$ sudo dmesg | grep usb

[93862.823187] usb 2-2: new SuperSpeed USB device number 4 using xhci_hcd
[93862.844103] usb 2-2: New USB device found, idVendor=174c, idProduct=5106,
bcdDevice= 1.00
[93862.844109] usb 2-2: New USB device strings: Mfr=2, Product=3,
SerialNumber=1
[93862.844111] usb 2-2: Product: BlacX
[93862.844113] usb 2-2: Manufacturer: Thermaltake
[93862.844114] usb 2-2: SerialNumber: 000000000002
[93862.881811] usb-storage 2-2:1.0: USB Mass Storage device detected
[93862.881944] scsi host2: usb-storage 2-2:1.0
[93862.882037] usbcore: registered new interface driver usb-storage
[93862.885157] usbcore: registered new interface driver uas
[93887.950491] usb 2-2: reset SuperSpeed USB device number 4 using xhci_hcd
[94392.705178] usb 2-2: USB disconnect, device number 4
[94397.329093] usb 2-4: new SuperSpeed USB device number 5 using xhci_hcd
[94397.350234] usb 2-4: New USB device found, idVendor=174c, idProduct=5106,
bcdDevice= 1.00
[94397.350246] usb 2-4: New USB device strings: Mfr=2, Product=3,
SerialNumber=1
[94397.350252] usb 2-4: Product: BlacX
[94397.350255] usb 2-4: Manufacturer: Thermaltake
[94397.350259] usb 2-4: SerialNumber: 000000000002
[94397.353440] usb-storage 2-4:1.0: USB Mass Storage device detected
[94397.353565] scsi host2: usb-storage 2-4:1.0
[94405.460664] usb 2-2: new SuperSpeed USB device number 6 using xhci_hcd
[94405.481472] usb 2-2: New USB device found, idVendor=174c, idProduct=5106,
bcdDevice= 1.00
[94405.481478] usb 2-2: New USB device strings: Mfr=2, Product=3,
SerialNumber=1
[94405.481481] usb 2-2: Product: BlacX
[94405.481483] usb 2-2: Manufacturer: Thermaltake
[94405.481484] usb 2-2: SerialNumber: 000000000001
[94405.483318] usb-storage 2-2:1.0: USB Mass Storage device detected
[94405.483606] scsi host3: usb-storage 2-2:1.0
[94845.006638] usb 2-2: USB disconnect, device number 6
[94857.034440] usb 2-4: USB disconnect, device number 5
[96252.135710] usb 2-2: new SuperSpeed USB device number 7 using xhci_hcd
[96252.156665] usb 2-2: New USB device found, idVendor=174c, idProduct=5106,
bcdDevice= 1.00
[96252.156679] usb 2-2: New USB device strings: Mfr=2, Product=3,
SerialNumber=1
[96252.156685] usb 2-2: Product: BlacX
[96252.156689] usb 2-2: Manufacturer: Thermaltake
[96252.156693] usb 2-2: SerialNumber: 000000000001
[96252.160248] usb-storage 2-2:1.0: USB Mass Storage device detected
[96252.160387] scsi host2: usb-storage 2-2:1.0
[96618.800360] usb 2-2: USB disconnect, device number 7
[96643.705966] usb 2-3.1: new SuperSpeed USB device number 8 using xhci_hcd
[96643.726865] usb 2-3.1: New USB device found, idVendor=174c, idProduct=5106,
bcdDevice= 1.00
[96643.726872] usb 2-3.1: New USB device strings: Mfr=2, Product=3,
SerialNumber=1
[96643.726874] usb 2-3.1: Product: BlacX
[96643.726876] usb 2-3.1: Manufacturer: Thermaltake
[96643.726877] usb 2-3.1: SerialNumber: 000000000001
[96643.731430] usb-storage 2-3.1:1.0: USB Mass Storage device detected
[96643.731717] scsi host2: usb-storage 2-3.1:1.0
[97775.098841] usb 2-3.1: USB disconnect, device number 8
[97789.264277] usb 1-1.4: USB disconnect, device number 14
[109374.033610] usb 2-4: new SuperSpeed USB device number 9 using xhci_hcd
[109374.054547] usb 2-4: New USB device found, idVendor=174c, idProduct=5106,
bcdDevice= 1.00
[109374.054561] usb 2-4: New USB device strings: Mfr=2, Product=3,
SerialNumber=1
[109374.054567] usb 2-4: Product: BlacX
[109374.054571] usb 2-4: Manufacturer: Thermaltake
[109374.054575] usb 2-4: SerialNumber: 000000000002
[109374.056168] usb-storage 2-4:1.0: USB Mass Storage device detected
[109374.056547] scsi host2: usb-storage 2-4:1.0
[109399.212614] usb 2-4: reset SuperSpeed USB device number 9 using xhci_hcd
[109516.959732] usb 2-4: USB disconnect, device number 9
[109519.055610] usb 2-4: new SuperSpeed USB device number 10 using xhci_hcd
[109519.076525] usb 2-4: New USB device found, idVendor=174c, idProduct=5106,
bcdDevice= 1.00
[109519.076540] usb 2-4: New USB device strings: Mfr=2, Product=3,
SerialNumber=1
[109519.076545] usb 2-4: Product: BlacX
[109519.076550] usb 2-4: Manufacturer: Thermaltake
[109519.076554] usb 2-4: SerialNumber: 000000000002
[109519.078216] usb-storage 2-4:1.0: USB Mass Storage device detected
[109519.078505] scsi host2: usb-storage 2-4:1.0

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