Re: Hotplug USB

[Micha Feigin <michf@post.tau.ac.il>]

On Sun, Jan 18, 2004 at 09:57:15AM +0000, Andrew Neillans wrote:
> Hi all,
> 
> I am trying to get hotplugging of usb going, so that when I connect a 
> usb-storage device, it is automatically mounted, and an icon dropped on my 
> desktop -- when the device is removed, it gets cleared up.
> 
> So far I am just trying to get it to behave using the command line, but I have 
> noticed something odd in the logs.
> 
> Jan 18 09:53:44 debian-laptop kernel: hub 2-0:1.0: new USB device on port 1, 
> assigned address 2
> Jan 18 09:53:44 debian-laptop kernel: SCSI subsystem initialized
> Jan 18 09:53:44 debian-laptop kernel: Initializing USB Mass Storage driver...
> Jan 18 09:53:45 debian-laptop kernel: scsi0 : SCSI emulation for USB Mass 
> Storage devices
> Jan 18 09:53:47 debian-laptop kernel:   Vendor: HITACHI_  Model: DK23CA-30         
> Rev:  0 0
> Jan 18 09:53:47 debian-laptop kernel:   Type:   Direct-Access                      
> ANSI SCSI revision: 02
> Jan 18 09:53:47 debian-laptop kernel: drivers/usb/core/usb.c: registered new 
> driver usb-storage
> Jan 18 09:53:47 debian-laptop kernel: USB Mass Storage support registered.
> Jan 18 09:53:47 debian-laptop scsi.agent[987]: bogus sysfs DEVPATH=/devices/
> pci0000:00/0000:00:0b.0/usb2/2-1/2-1:1.0/host0/0:0:0:0
> 
> Why is scsi.agent from hotplug running? Surely it should be usb.agent running? 
> I have a script setup for usb, but not scsi ...
> 
> If I fdisk -l /dev/sda I get the correct partition table list..
> 

/dev/sda is a scsi disk.
The kernel emulates a scsi disk over the usb device as an abstraction
layer. The same thing is also done with cd burners.
You need the scsi support in order to access the disk.

> So, is that scsi.agent ok to be ignored?
> 
> Andy
> 
> 
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