Re: USB Mass Storage devices continually reenumerate

Hi,

On 10/17/07, Mike Nuss <[email protected]> wrote:
> I'm seeing some flaky behavior with USB sticks on an OHCI system that
> work fine elsewhere. The issues aren't consistent, but often when I plug
> in a device it disconnects when the storage code tries to scan it, then
> it reconnects, then it disconnects again, ad infinitum. For example:
>
> usb 1-2: new full speed USB device using ohci_hcd and address 54
> usb 1-2: Product: TRAVELDRIVE 005B
> usb 1-2: Manufacturer: Memorex
> usb 1-2: SerialNumber: 07770E2F0044
> usb 1-2: configuration #1 chosen from 1 choice
> scsi29 : SCSI emulation for USB Mass Storage devices
> scsi 29:0:0:0: Direct-Access     Memorex  TRAVELDRIVE 005B PMAP PQ: 0
> ANSI: 0 CCS
> usb 1-2: USB disconnect, address 54
> sd 29:0:0:0: [sda] READ CAPACITY failed
> sd 29:0:0:0: [sda] Result: hostbyte=0x01 driverbyte=0x00
> sd 29:0:0:0: [sda] Sense not available.
> sd 29:0:0:0: [sda] Write Protect is off
> sd 29:0:0:0: [sda] Attached SCSI removable disk
> usb 1-2: new full speed USB device using ohci_hcd and address 55
> usb 1-2: Product: TRAVELDRIVE 005B
> usb 1-2: Manufacturer: Memorex
> usb 1-2: SerialNumber: 07770E2F0044
> usb 1-2: configuration #1 chosen from 1 choice
> scsi30 : SCSI emulation for USB Mass Storage devices
> scsi 30:0:0:0: Direct-Access     Memorex  TRAVELDRIVE 005B PMAP PQ: 0
> ANSI: 0 CCS
> C: 0x24, ASCQ: 0x0
> sd 30:0:0:0: [sda] 2013184 512-byte hardware sectors (1031 MB)
> usb 1-2: USB disconnect, address 55
> sd 30:0:0:0: [sda] Write Protect is off
>  sda:<7>usb-storage: queuecommand called
> sd 30:0:0:0: [sda] Result: hostbyte=0x07 driverbyte=0x00
> sd 30:0:0:0: [sda] Result: hostbyte=0x01 driverbyte=0x00
> sd 30:0:0:0: [sda] Attached SCSI removable disk
> usb 1-2: new full speed USB device using ohci_hcd and address 56
> usb 1-2: Product: TRAVELDRIVE 005B
> usb 1-2: Manufacturer: Memorex
> usb 1-2: SerialNumber: 07770E2F0044
> usb 1-2: configuration #1 chosen from 1 choice
> scsi31 : SCSI emulation for USB Mass Storage devices
>
> and so on. I have the verbose mass storage output also, but it's a *lot*
> of output. I could post it somewhere if it would be useful. I've also
> (rarely) seen USB hubs "thrash" in the same way on this controller, but
> nowhere near this reproducibly.
>
> Any ideas? I do have some reason to suspect the host controller, but if
> so then I need to track down what the actual issue is, and it's quite
> reproducible with certain devices.

You should try to track the host controller... it looks like device is
drawing to much power and it's getting disconnected. Maybe it's a bug
in controller side.

Can you try this same devices with another linux box ??

>
> Thanks,
> Mike
>
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-- 
Best Regards,

Felipe Balbi
[email protected]

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