Date:	Tue, 9 Oct 2012 09:51:55 +0800
From:	WANG Siyuan <wangsiyuanbuaa@...il.com>
To:	Daniel Mack <zonque@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: usb 3.0 hard drive doesn't work

hi, Daniel
my usb 3.0 hard drive doesn't have external power. this is a "western
digital" usb hard drive: WDBACY5000AWT
here is a Product Specifications:
http://www.wdc.com/wdproducts/library/AAG/ENG/4178-705131.pdf

i start my laptop with ubuntu, the usb3.0 port could use the usb3.0
hard drive. but the write speed is only 50MB/s (test with dd)
but archlinux cannot recognize the hard drive.

thank you for replaying.

On Mon, Oct 8, 2012 at 5:31 AM, Daniel Mack <zonque@...il.com> wrote:
> (cc linux-usb)
>
> On 07.10.2012 10:48, 王思源 wrote:
>> hi,
>> i have a usb 3.0 hard drive and a laptop with usb 3.0 port.
>> when the hard drive is connected to the usb 3.0 port, the drive could
>> not be found.
>> the dmesg output is listed below.
>> additinal info:
>> 1) the usb 3.0 hard drive can be found when connected to usb 2.0 port.
>> 2) the usb 2.0 hard drive can be found when connected to usb 3.0 port.
>> 3) mouse works when connected to the usb 3.0 port.
>> 4) it is archlinux and kernel version is 3.5.5-1-ARCH
>> it seems that it is not the linux driver's problem, because the mouse
>> could work and the hard drive is found due to the dmesg.
>> is this a bug?
>> would someone help me?
>> thank you!
>>
>> dmesg out put when usb 3.0 hard drive is conneted to usb 3.0 port:
>> [  646.077385] usb 2-2: new SuperSpeed USB device number 2 using xhci_hcd
>> [  646.171319] usbcore: registered new interface driver uas
>> [  646.175313] Initializing USB Mass Storage driver...
>> [  646.175501] scsi4 : usb-storage 2-2:1.0
>> [  646.175665] usbcore: registered new interface driver usb-storage
>> [  646.175667] USB Mass Storage support registered.
>> [  657.149403] scsi 4:0:0:0: Direct-Access     WD       My Passport
>> 0730 1016 PQ: 0 ANSI: 6
>> [  657.149974] sd 4:0:0:0: [sdb] 976707584 512-byte logical blocks:
>> (500 GB/465 GiB)
>> [  657.150223] sd 4:0:0:0: [sdb] Write Protect is off
>> [  657.150232] sd 4:0:0:0: [sdb] Mode Sense: 47 00 10 08
>> [  657.150456] sd 4:0:0:0: [sdb] No Caching mode page present
>> [  657.150462] sd 4:0:0:0: [sdb] Assuming drive cache: write through
>> [  657.151436] sd 4:0:0:0: [sdb] No Caching mode page present
>> [  657.151440] sd 4:0:0:0: [sdb] Assuming drive cache: write through
>> [  657.159907]  sdb: sdb1
>> [  657.160852] sd 4:0:0:0: [sdb] No Caching mode page present
>> [  657.160858] sd 4:0:0:0: [sdb] Assuming drive cache: write through
>> [  657.160861] sd 4:0:0:0: [sdb] Attached SCSI disk
>> [  657.268875] usb 2-2: Device not responding to set address.
>> [  657.471456] usb 2-2: Device not responding to set address.
>> [  657.674211] usb 2-2: device not accepting address 2, error -71
>> [  657.780745] usb 2-2: Device not responding to set address.
>> [  657.983519] usb 2-2: Device not responding to set address.
>> [  658.186214] usb 2-2: device not accepting address 2, error -71
>> [  658.292717] usb 2-2: Device not responding to set address.
>> [  658.495537] usb 2-2: Device not responding to set address.
>
> From the logs, this smells like a power supply problem. Can you connect
> an external supply or do you have a powered USB3 hub? It's possible that
> it draws less power in USB2.0 mode, so that would explain what you describe.
>
> But I could be wrong alltogether :)
>
>
> Daniel
>



-- 
王思源
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