On Wed, Jan 23, 2008 at 08:19:24PM +0100, Martin Laabs wrote:
Hi,
I ask the same question some day on -questions before but got
no usefull answer. Since it is also more technical
related I try it here again.
I created a dvd with two slices a and b. (Don't ask for the
reason - it is a test for my backup system)
This slices are ufs formated and gbde encrypted. However -
if I insert the DVD (and also a read access is done) the device
nodes acd0a and acd0b are not created automaticly. But if
the DVD is inserted *before* boot this two nodes are there
and stay even if I insert a normal DVD without slices.
An other way to update the device nodes is to detach an
attach the ata channel with atacontrol while the sliced DVD
is beeing inserted. But this is not very smart. (In particular
if there is i.e. a second device at this channel that is then
disconnected too.)
A similar way it to reload the atapicam modul. In this case
the cd0* device nodes are updated. The problems are the same
as with atacontroll de-/attach.
So I'am searching for a better way to tell the kernel/devfs
to update the device node list of the atapi devices. Unfortu-
nately I couldn't find a appropiate ioctl in the source of
atacontrol. Since I didn't understand the conecpt of geom
fully now I'm not sure whether geom also handle the
single (a)d[0-] and (a)cd[0-] devices and if there is maybe
a geom command for the slice reread
More or less there is:
cp /dev/null /dev/acd0
Not sure if it works for CD's but it works for removeable disks.
The problem is that many drives don't tell you about media change,
so you have to poll or trigger yourself.
--
B.Walterhttp://www.bwct.de http://www.fizon.de
[EMAIL PROTECTED] [EMAIL PROTECTED][EMAIL PROTECTED]
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