[Techtalk] Re: mounting usb

[Conor Daly]

On Sat, Apr 19, 2003 at 11:30:27PM +0100 or so it is rumoured hereabouts, 
iriXx thought:
> Conor Daly wrote:
> 
> > It should show up under one of the other /dev/sd? devices.  Do
> > 
> > fdisk -l
> > 
> > which _should_ show you all partitions on all drives.  There'll be a clue
> > in there somewhere.  Also have a look around /proc/bus/usb and see if you
> > find anything in there...
> > 
> > Conor (who only got his usb flash disk working on Saturday)
> > 
> 
> hmm.. i've only just had time to try this.... it doesnt seem to be 
> working tho :-(... any ideas?...
> 
> the chkconfig commands didnt work under mandrake 8.2 ... but `hotplug 
> usb start' did work...
> 
> i unplugged and replugged the little caddy drive but this is all i get 
> from fdisk -l (my 4 scsi drives) :
> 
 
> [root at wembly alsa-driver]# fdisk -l
> 
> Disk /dev/scsi/host0/bus0/target0/lun0/disc: 255 heads, 63 sectors, 527 
> cylinders
> Units = cylinders of 16065 * 512 bytes

[Lots of sosi stuff snipped]
I'm not familiar with the devfs filesystem so I can't really comment on
the above. 

> ...and this is what is in /proc/bus/usb/devices : just my m-audio 
> quattro usb audio interface...
> 
> [root at wembly alsa-driver]# less /proc/bus/usb/devices

This is your USB hub.

> T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
> B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
> D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
> P:  Vendor=0000 ProdID=0000 Rev= 0.00
> S:  Product=USB UHCI Root Hub
> S:  SerialNumber=9000
> C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
> I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
> E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=255ms

And this is the m-audio

> T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
> D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
> P:  Vendor=0763 ProdID=2001 Rev= 1.05
> S:  Manufacturer=M Audio
> S:  Product=USB Audio Quattro
> C:* #Ifs=10 Cfg#= 1 Atr=40 MxPwr=  0mA
[various m-audio bits snipped]

My /proc/bus/usb/devices shows up the usb flash immediately on insertion
so this suggests your hotplug service is not picking up the device.  The
only tweaking I had to do was to 'modprobe usb-storage' and that was with
a custom kernel.  With the stock RH7.2 kernel, I just ran hotplug and
plugged in the device.

Watch /var/log/messages for hints of hotplug startup  
'grep hotplug /var/log/messages'

If you don't see hotplug messages, the usb device won't show.  

also look out for usb messages
'grep usb /var/log/messages'

You should usb "connect" messages

Apr  5 18:24:58 Valkerie kernel: hub.c: USB new device connect on bus1/1,
assigned device number 2
Apr  5 18:24:59 Valkerie kernel: usb.c: USB device 2 (vend/prod
0xd7d/0x150) is not claimed by any active driver.

This is all I see until I 'modprobe usb-storage'.  Then I get this:

Apr  5 18:24:59 Valkerie kernel: SCSI subsystem driver Revision: 1.00
Apr  5 18:24:59 Valkerie kernel: Initializing USB Mass Storage driver...
Apr  5 18:24:59 Valkerie kernel: usb.c: registered new driver usb-storage
Apr  5 18:24:59 Valkerie kernel: scsi0 : SCSI emulation for USB Mass
Storage devices
Apr  5 18:24:59 Valkerie kernel:   Vendor:           Model: USB MP3
Rev: 1.06
Apr  5 19:42:27 Valkerie kernel:   Type:   Direct-Access
ANSI SCSI revision: 02
Apr  5 19:42:27 Valkerie kernel: Attached scsi removable disk sda at
scsi1, channel 0, id 0, lun 0
Apr  5 19:42:27 Valkerie kernel: SCSI device sda: 256000 512-byte hdwr
sectors (131 MB)
Apr  5 19:42:27 Valkerie kernel: sda: Write Protect is off
Apr  5 19:42:27 Valkerie kernel:  sda: sda1
Apr  5 19:42:27 Valkerie kernel: USB Mass Storage support registered.

Note the line that says "Attached scsi removable disk sda".  And lo, my
usb flash device is at /dev/sda.

Do you get any lights on the usb drive when you connect it?  Do you see
any hotplug or usb messages in the log?

Conor
-- 
Conor Daly <conor.daly at oceanfree.net>

Domestic Sysadmin :-)
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