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I built two RHEL 6.5 servers that will have Oracle DBs running on them. I created a udev-disk file in /etc/udev/rules.d/ that includes the scsi ids, user/group ownership, devices names, etc. After I was done I ran partprobe and start_udev. All is good, devices names show under /dev with the correct permissions.
Problem, after reboots, disk devices show root:root as the owners. I then run command start_udev and then correct permissions appear, in this case oracleracle.
How do I fix it, so oracleracle stay after reboot?
He may be using the disks as raw table spaces - in which case, the Oracle database has total control over the disk and allocations. This can be a bit more efficient (less overhead specifically) than using a filesystem to hold files for tablespaces.
What he needs is for udev to set the ownership of the device names to that of the oracle database (last I knew this was the "oracle" login).
Yes jpollard, you are correct. Oracle has control of the devices, so no entries in /etc/fstab, no pvcreate/vgcreate/lvcreate. Basically you only partition the disks with fdisk and configure UDEV.
The linux servers I configured use Quest/VAS to authenticate to the domain. After reboot the UDEV service started before the VAS service, so the oracle owners could not be authenticated, therefore assigning root:root.
The fix: use the uid and gid of the owner:group in place of the names within the udev-asm file created at /etc/udev/rules.d/. Below is what inside of the file looks like, for one disk.