You probably need to mount /dev/sda1 (a partition) rather than the whole 
device. Using fdisk should tell you wha tthe partitions are, although it 
would normally also tell you this in your kernel logs.

On Sat, 22 Jun 2002, David wrote:

> I am trying to use my ZiO! smart media card reader with Linux.  I am using
> kernel 2.4.19-pre10 with Slackware 8.0.  I have all the necessary modules
> installed(CONFIG_SCSI (module), CONFIG_BLK_DEV_SD (module),
> CONFIG_CHR_DEV_SG (module), CONFIG_USB, CONFIG_USB_STORAGE (module),
> CONFIG_USB_STORAGE_DPCM, CONFIG_USB_SDDR09).  When I plug the device, I
> get this in /var/log/syslog:
> 
> Jun 22 21:02:14 erwin kernel: usb.c: new device strings: Mfr=1, Product=2,
> SerialNumber=0
> Jun 22 21:02:14 erwin kernel: usb.c: USB device number 6 default language
> ID 0x409
> Jun 22 21:02:14 erwin kernel: Manufacturer: SCM Microsystems Inc.
> Jun 22 21:02:14 erwin kernel: Product: eUSB SmartMedia Adapter
> Jun 22 21:02:14 erwin kernel: WARNING: USB Mass Storage data integrity not
> assured
> Jun 22 21:02:14 erwin kernel: USB Mass Storage device found at 6
> Jun 22 21:02:14 erwin kernel: usb.c: usb-storage driver claimed interface
> cc242240
> Jun 22 21:02:14 erwin kernel: usb.c: kusbd: /sbin/hotplug add 6
> Jun 22 21:02:14 erwin kernel: usb.c: kusbd policy returned 0xfffffffe
> 
> and it is recognized correctly in /proc/scsi/usb-storage-0 . this is the
> listing for it:
> 
>    Host scsi1: usb-storage
>        Vendor: SCM Microsystems Inc.
>       Product: eUSB SmartMedia Adapter
> Serial Number: None
>      Protocol: Transparent SCSI
>     Transport: EUSB/SDDR09
>          GUID: 04e600030000000000000000
>      Attached: Yes
> 
> However, it is not listed in /proc/bus/usb (neither are any of my other
> devices), and when I try mount /dev/sda /camera I get the following
> output:
> 
> /dev/sda: Input/output error
> mount: block device /dev/sda is write-protected, mounting read-only
> /dev/sda: Input/output error
> mount: you must specify the filesystem type
> 
> so I tried specifying both vfat and msdos, but i got the same error for
> both filesystems:
> 
> mount: block device /dev/sda is write-protected, mounting read-only
> mount: wrong fs type, bad option, bad superblock on /dev/sda,
>        or too many mounted file systems
> 
> Can anyone help me?
> 
> 

-- 
 /------------------------------------+-------------------------\
|Stephen J. Gowdy                     | SLAC, MailStop 34,       |
|http://www.slac.stanford.edu/~gowdy/ | 2575 Sand Hill Road,     |
|http://calendar.yahoo.com/gowdy      | Menlo Park CA 94025, USA |
|EMail: [EMAIL PROTECTED]       | Tel: +1 650 926 3144     |
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