puzzling disapearance of /dev/sdc1

[Loic Dachary <loic@dachary.org>]

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Hi Ilya,

This is another puzzling behavior (the log of all commands is at http://tracker.ceph.com/issues/14094#note-4). in a nutshell, after a series of sgdisk -i commands to examine various devices including /dev/sdc1, the /dev/sdc1 file disappears (and I think it will showup again although I don't have a definitive proof of this).

It looks like a side effect of a previous partprobe command, the only command I can think of that removes / re-adds devices. I thought calling udevadm settle after running partprobe would be enough to ensure partprobe completed (and since it takes as much as 2mn30 to return, I would be shocked if it does not ;-).

Any idea ? I desperately try to find a consistent behavior, something reliable that we could use to say : "wait for the partition table to be up to date in the kernel and all udev events generated by the partition table update to complete". 

Cheers
-- 
Loïc Dachary, Artisan Logiciel Libre


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