After having added 2 disks of 1Tb to a Dell PowerEdge, I went through their initialization with the goal to add them to an existing LVM VG.
When the MegaCli background initialization went complete, I did fdisk the new disk to add a Linux LVM partition on it.
Then, pvcreate refused to work:
Can't open /dev/sdn1 exclusively. Mounted filesystem?
Part of strace of the pvcreation:
open("/dev/sdn1", O_RDWR|O_EXCL|O_DIRECT|O_NOATIME) = -1 EBUSY (Device or resource busy)
Of course, the device is NOT mounted nor used: (fuser reports nothing).
Any idea why this is blocked?