You could try "eject /dev/sda" (or whatever).

On Thu, 26 Apr 2007, TMC wrote:

> Hi All
>
> I am not sure if this is the right forum to ask...  but it seems like
> the right first step.
>
> I am running Debian 4.0 with custom built 2.6.20.6 kernel.
>
> I have a USB media reader, vendor ID: 0x058f, Prduct ID:
> 0x6362, whic is a CF/MMC/SD/SM) etc reader that normally shows up as a
> SCSI device.
>
> I am seeing some behavior that puzzles me:
>
> when I attached this device via USB to a newly booted  system it's
> detected and all is well, so long as the media card is in the reader
> at the time. As expected the usb-storage module and sd-mod load,
> devices are scanned, partitions are found and so on.
>
> If I attached it without any media cards in it, or I have unmounted
> and removed a media cerd from the reader, it shows up as a bunch of
> SCSI removable devices  (sda, sdb, sdc, sdd) , but inserting a card
> into the reader does not result in a mountable SCSI device, even if I
> know which of them i need to mount. It seems that after first insert,
> there is no rescanning of the devices.
>
> So my question is:
>
> is there a way, using hotplug or udev or otherwise to:
>
> a) scan the USB card reader and detect media insertion
> b) scan the media and detect partitoons, etc
> c) NOT runa  daemon tnat auto-mounts them for me - I do not want to
> auto mount the devices, i just want to know when they are inserted...
>
> Tomasz
>
>

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