Lars Marowsky-Bree wrote:
On 2005-01-23T16:13:05, Luca Berra <bluca@xxxxxxxxxx> wrote:
the first one adds an auto=dev parameter
rationale: udev does not create /dev/md* device files, so we need a way
to create them when assembling the md device.
Am I missing something but shouldn't this be fixed by having udev +
hotplug create the /dev entry correctly?
There's a chicken-n-eggs problem here. In order for mdadm to create
an md device (so it will be noticed by udev/hotplug), it have to open
the control device, which, in case of md, is just any /dev/mdN. But
before first array gets assembled, there's NO mdN entries in /dev.
mdadm tries to open /dev/md1 to get control interface, which isn't
created automatically. When an array actually gets created, it will
be noticied by hotplug/udev as it should be (provided everything is
set up correctly ofcourse).
BTW, is there a real need to do that? In theory, one might just
create the necessary /dev/md1 from within startup script...
/mjt
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