Last updated on OCTOBER 19, 2016
Applies to:Linux OS - Version Oracle Linux 6.6 with Unbreakable Enterprise Kernel [2.6.39] to Oracle Linux 6.8 with Unbreakable Enterprise Kernel [4.1.12] [Release OL6U6 to OL6U8]
Information in this document applies to any platform.
After a kernel upgrade or disk remapping the correct permissions for the asm devices are not set to that in the udev rules, hence they remaining at "root:disk".
So the udev rules are not getting triggered. Hence the DBA had to change them manually to oracle:oinstall afterwards.
The ASM devices lose without any identifiable reason the privileges oracle:oinstall and are set back to root:disk .
The SAN devices are connected with multipath and integrated with udev.
Debugging has been enabled for multipath and for udev, but only apparent error is :
Change of disk mapping and/or reboot
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