How do i detect a USB device from the Linux Box

How do i detect a USB device from the Linux Box

[Mukund JB`.]

Dear all,

I have a USB device connected to Linux BOX running 2.6.10 kernel (F3).

I am able to mount read/write to the device with NO problem.

 

I find the following messages at attach time:-

 

usb 1-3: new high speed device using ehci_hcd and address 5

scsi4: SCSI emulation for USB Mass storage devices

usb-storage: device fount at 5

 

This are the messages are generated when I have plugged in my USB to the
system.

The address value & the device found value keeps on increasing for every
plug-in.

 

I find the following messages at detach time:-

 

usb 1-3: USB disconnected, address 5

 

The address value & the device found value keeps on increasing for every
plugin

 

What is it doing?

Do I need to run something like " detach the device safely" before
detaching the USB-device?

 

Thanks & Regards,

Mukund Jampala


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Re: How do i detect a USB device from the Linux Box

[osk]

no need ... that's server identification number

regards
osk

On 8/19/05, Mukund JB`. <mukundjb@esntechnologies.co.in> wrote:
> 
> 
> Dear all,
> 
> I have a USB device connected to Linux BOX running 2.6.10 kernel (F3).
> 
> I am able to mount read/write to the device with NO problem.
> 
> 
> 
> I find the following messages at attach time:-
> 
> 
> 
> usb 1-3: new high speed device using ehci_hcd and address 5
> 
> scsi4: SCSI emulation for USB Mass storage devices
> 
> usb-storage: device fount at 5
> 
> 
> 
> This are the messages are generated when I have plugged in my USB to the
> system.
> 
> The address value & the device found value keeps on increasing for every
> plug-in.
> 
> 
> 
> I find the following messages at detach time:-
> 
> 
> 
> usb 1-3: USB disconnected, address 5
> 
> 
> 
> The address value & the device found value keeps on increasing for every
> plugin
> 
> 
> 
> What is it doing?
> 
> Do I need to run something like " detach the device safely" before
> detaching the USB-device?
> 
> 
> 
> Thanks & Regards,
> 
> Mukund Jampala
> 
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs
> 


-- 
winners don't do different things
they do things differently
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Re: How do i detect a USB device from the Linux Box

[cr]

Assuming it's some sort of storage device you're using  - 

I'd say, *before* unplugging the USB device, you need to un-mount it with 
the 'umount'  command   
(and wait until the linux prompt comes up on the command line again, to make 
sure it's finished writing everything to the USB device, *before* you unplug 
it)

cr


On Fri, 19 Aug 2005 18:20, Mukund JB`. wrote:
> Dear all,
>
> I have a USB device connected to Linux BOX running 2.6.10 kernel (F3).
>
> I am able to mount read/write to the device with NO problem.
>
>
>
> I find the following messages at attach time:-
>
>
>
> usb 1-3: new high speed device using ehci_hcd and address 5
>
> scsi4: SCSI emulation for USB Mass storage devices
>
> usb-storage: device fount at 5
>
>
>
> This are the messages are generated when I have plugged in my USB to the
> system.
>
> The address value & the device found value keeps on increasing for every
> plug-in.
>
>
>
> I find the following messages at detach time:-
>
>
>
> usb 1-3: USB disconnected, address 5
>
>
>
> The address value & the device found value keeps on increasing for every
> plugin
>
>
>
> What is it doing?
>
> Do I need to run something like " detach the device safely" before
> detaching the USB-device?
>
>
>
> Thanks & Regards,
>
> Mukund Jampala
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs
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RE: How do i detect a USB device from the Linux Box

[Mukund JB`.]

I understood it. Thanks

However I have doubt regarding how Linux can work with any USB device
attached to it.
How does a device run without a device driver specific to the controller
on the attached USB?

Is it like it has all driver included for each & every device?
That cannot be possible. That will result in so BIG nasty kernel.

Thanks & regards,
Mukund Jampala


>-----Original Message-----
>From: osk [mailto:linuxkarthi@gmail.com]
>Sent: Friday, August 19, 2005 4:37 PM
>To: Mukund JB`.
>Cc: linux-newbie@vger.kernel.org
>Subject: Re: How do i detect a USB device from the Linux Box
>
>no need ... that's server identification number
>
>regards
>osk
>
>On 8/19/05, Mukund JB`. <mukundjb@esntechnologies.co.in> wrote:
>>
>>
>> Dear all,
>>
>> I have a USB device connected to Linux BOX running 2.6.10 kernel
(F3).
>>
>> I am able to mount read/write to the device with NO problem.
>>
>>
>>
>> I find the following messages at attach time:-
>>
>>
>>
>> usb 1-3: new high speed device using ehci_hcd and address 5
>>
>> scsi4: SCSI emulation for USB Mass storage devices
>>
>> usb-storage: device fount at 5
>>
>>
>>
>> This are the messages are generated when I have plugged in my USB to
the
>> system.
>>
>> The address value & the device found value keeps on increasing for
every
>> plug-in.
>>
>>
>>
>> I find the following messages at detach time:-
>>
>>
>>
>> usb 1-3: USB disconnected, address 5
>>
>>
>>
>> The address value & the device found value keeps on increasing for
every
>> plugin
>>
>>
>>
>> What is it doing?
>>
>> Do I need to run something like " detach the device safely" before
>> detaching the USB-device?
>>
>>
>>
>> Thanks & Regards,
>>
>> Mukund Jampala
>>
>>
>> -
>> To unsubscribe from this list: send the line "unsubscribe
linux-newbie"
>in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at http://www.linux-learn.org/faqs
>>
>
>
>--
>winners don't do different things
>they do things differently
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Re: How do i detect a USB device from the Linux Box

[osk]

the drivers are build with kernel as modules, those drivers will
dnamically load into the memory when it's needed.

regards
osk

On 8/19/05, Mukund JB`. <mukundjb@esntechnologies.co.in> wrote:
> 
> I understood it. Thanks
> 
> However I have doubt regarding how Linux can work with any USB device
> attached to it.
> How does a device run without a device driver specific to the controller
> on the attached USB?
> 
> Is it like it has all driver included for each & every device?
> That cannot be possible. That will result in so BIG nasty kernel.
> 
> Thanks & regards,
> Mukund Jampala
> 
> 
> >-----Original Message-----
> >From: osk [mailto:linuxkarthi@gmail.com]
> >Sent: Friday, August 19, 2005 4:37 PM
> >To: Mukund JB`.
> >Cc: linux-newbie@vger.kernel.org
> >Subject: Re: How do i detect a USB device from the Linux Box
> >
> >no need ... that's server identification number
> >
> >regards
> >osk
> >
> >On 8/19/05, Mukund JB`. <mukundjb@esntechnologies.co.in> wrote:
> >>
> >>
> >> Dear all,
> >>
> >> I have a USB device connected to Linux BOX running 2.6.10 kernel
> (F3).
> >>
> >> I am able to mount read/write to the device with NO problem.
> >>
> >>
> >>
> >> I find the following messages at attach time:-
> >>
> >>
> >>
> >> usb 1-3: new high speed device using ehci_hcd and address 5
> >>
> >> scsi4: SCSI emulation for USB Mass storage devices
> >>
> >> usb-storage: device fount at 5
> >>
> >>
> >>
> >> This are the messages are generated when I have plugged in my USB to
> the
> >> system.
> >>
> >> The address value & the device found value keeps on increasing for
> every
> >> plug-in.
> >>
> >>
> >>
> >> I find the following messages at detach time:-
> >>
> >>
> >>
> >> usb 1-3: USB disconnected, address 5
> >>
> >>
> >>
> >> The address value & the device found value keeps on increasing for
> every
> >> plugin
> >>
> >>
> >>
> >> What is it doing?
> >>
> >> Do I need to run something like " detach the device safely" before
> >> detaching the USB-device?
> >>
> >>
> >>
> >> Thanks & Regards,
> >>
> >> Mukund Jampala
> >>
> >>
> >> -
> >> To unsubscribe from this list: send the line "unsubscribe
> linux-newbie"
> >in
> >> the body of a message to majordomo@vger.kernel.org
> >> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >> Please read the FAQ at http://www.linux-learn.org/faqs
> >>
> >
> >
> >--
> >winners don't do different things
> >they do things differently
> 


-- 
winners don't do different things
they do things differently
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Re: How do i detect a USB device from the Linux Box

[Arturas Moskvinas]

> the drivers are build with kernel as modules, those drivers will
> dnamically load into the memory when it's needed.
> 
> regards
> osk

I also think that lot's of device are very generic, I mean there is
tons of USB flash drives, and for most of them there is one driver
that "emulates" scsi interface (i think i'm wrong by saying
emulating...). The same goes to most of printers and so on, of course
there are specific drivers, but not much... Look in linux sources,
directory "/drivers/usb/" and you'll see that it is not that big...

Arturas M.
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RE: How do i detect a USB device from the Linux Box

[Mukund JB`.]

Hi Arthurus,

>I also think that lot's of device are very generic, I mean there is
>tons of USB flash drives, and for most of them there is one driver
>that "emulates" scsi interface (i think i'm wrong by saying
>emulating...). The same goes to most of printers and so on, of course
>there are specific drivers, but not much... Look in linux sources,
>directory "/drivers/usb/" and you'll see that it is not that big...

What u r saying looks absolutely correct?
I get some messages when ever I plug-in a USB device saying 
SCSIxx: SCSI emulation for USB Mass Storage device.

Where can see this code that integrates any USB device with the SCSI
Emulation?
I am just exited to know how it works.

Regards,
Mukund Jampala

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Re: How do i detect a USB device from the Linux Box

[Arturas Moskvinas]

> Where can see this code that integrates any USB device with the SCSI
> Emulation?
> I am just exited to know how it works.

I think you should look in directory: (or wherever your kernel sources are)
/usr/src/linux/drivers/usb/storage

Arturas M.
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