[dm-crypt] renaming of device

Sven Eschenberg sven at whgl.uni-frankfurt.de
Fri Jan 15 03:17:25 CET 2010

Arno Wagner schrieb:
> On Thu, Jan 14, 2010 at 11:16:29PM +0100, Sven Eschenberg wrote:
>> Hi Arno,
>> Concerning udev - you could either modify the configuration for the scsi  
>> subsystem, or you could copy it to you own rule file modify it and  
>> override debian's defaults.
>> This ways you are a little safer, when the distribution modifies some  
>> rules (for some odd reason) and are sure that dmcrypt returns the name  
>> you expect. In general this is true for most device names where you have  
>> special needs.
>> On my debian there are no rules for creating /dev/scsi/* names, at least  
>> not for scsi disks. Might be you are stuck with an older udev or some  
>> outdated configuration maybe?
> I don't know and do not really have time to investigate now.
> Come to think of it, it could also have some connection to a
> recent kernel upgrade, I am running from kernel.org.
> I did not notice the issue before, so maybe the kernel now also
> creates device files and there was something about a device
> pseudo filesystem or the like in the patchnotes.

Ah, I guess you unfortunately actiavted kernel managed tmpfs in /dev, 
which is an experimental feature. Check for CONFIG_DEVTMPFS in your 
kernel config, I bet it is turned on.

> Anyways, I will just look up major and minor numbers manually 
> until cryptsetup either reports all matching in /dev/ or has
> a preferred device for a major/minor combination.
>> Regards
>> -Sven



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