On Thu, 1 Feb 2007, Andrew Morton wrote:

> Apparently this is a usb-storage problem.

I don't think so.  It may be a hardware problem.

> Begin forwarded message:
> 
> Date: Thu, 1 Feb 2007 14:00:15 +0100
> From: "Kobajashi Zaghi" <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Cc: [email protected]
> Subject: 2 GB SD card problem vs. 2.6.20-rc7 (FAT: Filesystem panic (dev 
> sdc1))
> 
> 
> Hi Pierre!
> 
> I have two 2GB capacity SD card (Kingston, noname). When i put either
> of them to a card reader, kernel recognize, but "see" only 1GB
> capacity, and when i try to access, FAT filesystem paniced.
> 
> dmesg:
> --------
> 
> [snip]
> [  216.408000] usb 4-3: new high speed USB device using ehci_hcd and address 3
> [  216.537000] usb 4-3: configuration #1 chosen from 1 choice
> [  216.650000] usbcore: registered new interface driver libusual
> [  216.664000] Initializing USB Mass Storage driver...
> [  216.664000] scsi0 : SCSI emulation for USB Mass Storage devices
> [  216.664000] usbcore: registered new interface driver usb-storage
> [  216.664000] USB Mass Storage support registered.
> [  216.664000] usb-storage: device found at 3
> [  216.664000] usb-storage: waiting for device to settle before scanning
> [  221.668000] scsi 0:0:0:0: Direct-Access     GENERIC  USB
> Storage-SMC  I16A PQ: 0 ANSI: 0 CCS
> [  221.673000] scsi 0:0:0:1: Direct-Access     GENERIC  USB
> Storage-CFC  I16A PQ: 0 ANSI: 0 CCS
> [  221.678000] scsi 0:0:0:2: Direct-Access     GENERIC  USB
> Storage-SDC  I16A PQ: 0 ANSI: 0 CCS
> [  221.683000] scsi 0:0:0:3: Direct-Access     GENERIC  USB
> Storage-MSC  I16A PQ: 0 ANSI: 0 CCS
> [  221.691000] usb-storage: device scan complete
> [  221.792000] sd 0:0:0:0: Attached scsi removable disk sda
> [  221.794000] sd 0:0:0:1: Attached scsi removable disk sdb
> [  221.798000] SCSI device sdc: 1992704 512-byte hdwr sectors (1020 MB)

There you see it.  The card reader reports that the card contains only 
about 1 GB, not 2 GB.

As I understand it, the standards for SD cards holding more than 1 GB are 
in flux.  There are combinations of cards and readers which simply don't 
work.  This looks like one of them.

What happens if you use the same card and reader under another operating 
system?

Alan Stern


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