USB *-IN-1 card readers

[Nathan England]

I have probe all luns checked. Everything on these pages is correct for my 
machine. Maybe this particular card reader doesn't like linux?

On Wednesday 30 August 2006 09:50, Alan Dayley wrote:
> These multi-card readers can cause problems for some users.  They present
> each slot as a separate logical unit (LU) on a single device.  If the
> kernel you are using is not configured for multiple LUs on a device, you
> will only see one slot.  Many distros provide a kernel binary with
> multi-LU support disabled since most SCSI devices only ever are used with
> one LU.
>
> This page gives some detail:
> http://www.cs.sfu.ca/~ggbaker/personal/cf-linux
>
> Background Points:
> - USB storage devices, including card readers, are mapped to the OS as
> SCSI devices.
> - SCSI devices can have multiple logical units.
> -- An LU is a subset of the device as a whole.  For example, a SCSI hard
> disk drive can be divided into two logical units so that the host "sees"
> two hard drives contained within the one physical device.
> - *-in-1 readers present each slot as a separate LU.
>
> Perhaps this advice can get you around the issue if you don't want to
> rebuild your kernel:
> http://www.redhat.com/archives/rhl-beta-list/2004-May/msg00238.html
> Or try this one:
> http://lists.debian.org/debian-knoppix/2003/07/msg00026.html
>
> None of the above references address how to configure and build a kernel.
> If you need to do that, let us know.
>
> Alan
>
> On Wed, August 30, 2006 8:36 am, Nathan England wrote:
> > That is what I expected to happen, but it showed only one drive and it
> > would
> > not let me mount it. I tried many ways of plugging it in with and without
> > the
> > card inserted. Without the card, the sda and sg devices didn't exist, but
> > with the card in, sda1 and sg0 showed up, but I could do nothing with
> > them.

-- 
~~~~~~~~~~~~~~~~~~
Nathan England
PaysonLinux User Group 
nathan at paysonlinux.org
http://www.paysonlinux.org/

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