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From: Steven Flintham on 10 Jan 2006 18:40
Hi,

I'm running Debian 3.1 and have been using a couple of 512MB SD cards in
my USB card reader without any problems. I'm running the standard 2.4
kernel and have the following in /etc/fstab:

/dev/sdc1 /media/mmc vfat rw,user,noauto 0 0

When I do:

mount /media/mmc

the SD card mounts fine, and dmesg shows:

SCSI device sdc: 1002496 512-byte hdwr sectors (513 MB)
sdc: Write Protect is off
/dev/scsi/host2/bus0/target0/lun2: p1

I've recently bought a 2GB SD card, which seems to work fine (at least
as far as my Treo 600 is concerned). However, when I put it in the card
reader and try to mount it, the process hangs (the system is fine, it's
just that process which seems unkillable - I'm writing this with the
system in this state) and dmesg shows:

SCSI device sdc: 2031616 1024-byte hdwr sectors (2080 MB)
sdc: Write Protect is off
/dev/scsi/host2/bus0/target0/lun2:<6>usb.c: USB disconnect on device
00:07.2-2address 2
hub.c: new USB device 00:07.2-2, assigned address 3
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 3

I've tried running:

mkdosfs /dev/sdc1

which works fine with a 512MB card but produces a similar process hang
with the 2GB card.

I tried using the 2.6.8 kernel but when I installed it and rebooted, my
system seemed to encounter a kernel panic - I have to admit I haven't
investigated this in any great detail.

I don't have any other operating systems installed so I can't tell if my
card reader is somehow incompatible with 2GB cards, but I tried booting
off an old version of Knoppix (3.6 2004-08-16) which I had lying around.
Under that I can't seem to manage to mount even my 512MB card, so that
wasn't much help.

Any advice would be appreciated. Thanks, and apologies if I somehow
managed to miss any advice on this when I searched the debian-user
archives.

Steve


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From: Ron Johnson on 11 Jan 2006 10:50
On Tue, 2006-01-10 at 23:22 +0000, Steven Flintham wrote:
> Hi,
>
> I'm running Debian 3.1 and have been using a couple of 512MB SD cards in
> my USB card reader without any problems. I'm running the standard 2.4
> kernel and have the following in /etc/fstab:
>
> /dev/sdc1 /media/mmc vfat rw,user,noauto 0 0
>
> When I do:
>
> mount /media/mmc
>
> the SD card mounts fine, and dmesg shows:
>
> SCSI device sdc: 1002496 512-byte hdwr sectors (513 MB)
> sdc: Write Protect is off
> /dev/scsi/host2/bus0/target0/lun2: p1
>
> I've recently bought a 2GB SD card, which seems to work fine (at least
> as far as my Treo 600 is concerned). However, when I put it in the card
> reader and try to mount it, the process hangs (the system is fine, it's
> just that process which seems unkillable - I'm writing this with the
> system in this state) and dmesg shows:
>
> SCSI device sdc: 2031616 1024-byte hdwr sectors (2080 MB)
> sdc: Write Protect is off
> /dev/scsi/host2/bus0/target0/lun2:<6>usb.c: USB disconnect on device
> 00:07.2-2address 2
> hub.c: new USB device 00:07.2-2, assigned address 3
> WARNING: USB Mass Storage data integrity not assured
> USB Mass Storage device found at 3
>
> I've tried running:
>
> mkdosfs /dev/sdc1
>
> which works fine with a 512MB card but produces a similar process hang
> with the 2GB card.
>
> I tried using the 2.6.8 kernel but when I installed it and rebooted, my
> system seemed to encounter a kernel panic - I have to admit I haven't
> investigated this in any great detail.
>
> I don't have any other operating systems installed so I can't tell if my
> card reader is somehow incompatible with 2GB cards, but I tried booting
> off an old version of Knoppix (3.6 2004-08-16) which I had lying around.
> Under that I can't seem to manage to mount even my 512MB card, so that
> wasn't much help.
>
> Any advice would be appreciated. Thanks, and apologies if I somehow
> managed to miss any advice on this when I searched the debian-user
> archives.

The maximum size of a FAT16 FS is 2GB. Maybe there's an "off by 1"
error?

Have you tried formatting it FAT32, or re-partitioning sdc1 1.95GB?

--
-----------------------------------------------------------------
Ron Johnson, Jr.
Jefferson, LA USA

"Democracy becomes a government of bullies, tempered by editors."
Ralph Waldo Emerson


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From: Darryl Clarke on 11 Jan 2006 13:50
On 1/10/06, Steven Flintham <saf(a)lemma.co.uk> wrote:
> Hi,
>
> I'm running Debian 3.1 and have been using a couple of 512MB SD cards in
> my USB card reader without any problems. I'm running the standard 2.4
> kernel and have the following in /etc/fstab:
>
> /dev/sdc1 /media/mmc vfat rw,user,noauto 0 0

[snip]

> SCSI device sdc: 2031616 1024-byte hdwr sectors (2080 MB)

According to this your SD exceeds 2GB by a few MB in size. Try
formatting with Fat32.

[big snip]

HTH.


--
~ Darryl ~ smartssa(a)gmail.com
http://smartssa.com / http://darrylclarke.com
From: Steven Flintham on 15 Jan 2006 13:40
On Wed, Jan 11, 2006 at 09:41:21AM -0600, Ron Johnson wrote:
> On Tue, 2006-01-10 at 23:22 +0000, Steven Flintham wrote:
> > SCSI device sdc: 2031616 1024-byte hdwr sectors (2080 MB)
> > sdc: Write Protect is off
> > /dev/scsi/host2/bus0/target0/lun2:<6>usb.c: USB disconnect on device
> > 00:07.2-2address 2
> > hub.c: new USB device 00:07.2-2, assigned address 3
> > WARNING: USB Mass Storage data integrity not assured
> > USB Mass Storage device found at 3

> The maximum size of a FAT16 FS is 2GB. Maybe there's an "off by 1"
> error?
>
> Have you tried formatting it FAT32, or re-partitioning sdc1 1.95GB?

Thanks, and also to the other poster who suggested this. Unfortunately I
don't seem to be able to repartition, when do I:

# fdisk /dev/sdc

it seems to hang and dmesg shows the following:

SCSI device sdc: 2031616 1024-byte hdwr sectors (2080 MB)
sdc: Write Protect is off
/dev/scsi/host2/bus0/target0/lun2:<6>usb.c: USB disconnect on device 00:07.2-2address 2
hub.c: new USB device 00:07.2-2, assigned address 3
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 3
scsi: device set offline - not ready or command retry failed after bus reset: host 2 channel 0 id 0 lun 2
I/O error: dev 08:20, sector 0
I/O error: dev 08:20, sector 0
unable to read partition table

Similar problems occur if I try to make a filesystem using something
other than mkdosfs.

Am I doing something obviously wrong? It could be the card reader is
fundamentally incompatible with the card for some reason, I may see if I
can arrange to try it on a Windows box as a diagnostic measure.

Thanks.

Steve


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