USB Mass Storage Device

USB Mass Storage Device

[jim beam]

Hello group,

The following USB Mass Storage device is found during bootup:

scsi0 : SCSI emulation for USB
Mass Storage devices
  Vendor: SOYO      Model: USB Storage-SMC   Rev: 0214
  Type:   Direct-Access                      ANSI SCSI revision: 02
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0

Is it a CompactFlash reader that plugs directly into a USB1 header on my 
motherboard.

/sys/bus/scsi/devices/0:0:0:0/* contains information regarding the device, 
however there is nothing /dev/scsi/host0/bus0/target0/lun0 for me to mount, 
regardless of whether there is a card in the drive or not.  I have hotplug 
enables, and inserting a card in the drive does not generate any new 
messages under dmesg (although verbosity stuff is not enabled).  Is this 
device not yet supported, or am I missing something that I need to enable?

Thanks,
Jim




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Re: USB Mass Storage Device

[Douglas Gilbert]

Jim Bean wrote:
 > The following USB Mass Storage device is found during bootup:
 >
 > scsi0 : SCSI emulation for USB
 > Mass Storage devices
 >   Vendor: SOYO      Model: USB Storage-SMC   Rev: 0214
 >   Type:   Direct-Access                      ANSI SCSI revision: 02
 > Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
 >
 > Is it a CompactFlash reader that plugs directly into a USB1 header
 > on my motherboard.

 > /sys/bus/scsi/devices/0:0:0:0/* contains information regarding
 > the device, however there is nothing
 > /dev/scsi/host0/bus0/target0/lun0 for me to mount, regardless
 > of whether there is a card in the drive or not.  I have
 > hotplug enables, and inserting a card in the drive does not
 > generate any new messages under dmesg (although verbosity
 > stuff is not enabled).  Is this device not yet supported,
 > or am I missing something that I need to enable?

Jim,
Have a look in /var/log/messages for errors coming from the
sd driver (e.g. it could be stuck on a READ CAPACITY or MODE
SENSE command). Other than that it could be a problem with
devfs. You could make a temporary device node (e.g.
'cd /root; mknod my_sda b 8 0') then try fdisk on my_sda.

Doug Gilbert

Re: USB Mass Storage Device

[Robert Love]

On Sat, 2003-04-12 at 19:25, Douglas Gilbert wrote:

> Have a look in /var/log/messages for errors coming from the
> sd driver (e.g. it could be stuck on a READ CAPACITY or MODE
> SENSE command). Other than that it could be a problem with
> devfs. You could make a temporary device node (e.g.
> 'cd /root; mknod my_sda b 8 0') then try fdisk on my_sda.

I see the same problem here without devfs.

The device does not even register itself as a block device.  I.e., on
boot it is detected and listed as sda but no sda* device is a valid
block device.  /sys/block/ does not list it.

Also no errors in dmesg...

	Robert Love