Multi-card drive & partition nodes
Hi list!
(system is debian-unstable latest)
I am having the following problem with my USB multi card reader:
When I plug it in, udev creates the /dev/sda to /dev/sdd nodes but (of course) no partitions /dev/sd[a-d]n.
Now, when I insert e.g. a partitioned CompactFlash medium, there is no device node for it and I cannot use it.
Note that this is exactly what multi-card drives are made for... I have got some suggestions how it could be done:
-quick&dirty&crap, the "traditional" way: create some partition
nodes with any drive node. if there are too many partitions on a single drive, user is out of luck. Ugly.
-if the [sd/hd]x node exists and partition [sd/hf]xn is tried to open,
look quick if the partition does exist. I personally think this is a good way to do it because, as opposed to the auto-driver-loading in devfs, no big and/or dangerous operation is necessary to find out. Somewhat ugly, no doubt.
Probably the best solution for a non-perfect world where el cheapo companies create stuff that "Works with Windows" (tm).
-try to get noticed of media changes and re-read partition info.
Create partition nodes accordingly.
Elegant and best adapted to the problem, but perhaps impossible. Card reader _needs_ to tell OS "media change there-and-there" for this to work. In a perfect world, the perfect solution ;)
I hope that I posted to the right list for this ;)
Regards, Andreas
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Quoted 1 line · Andreas Hartmetz
(system is debian-unstable latest)
So README.Debian explains the solution.
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