Description of problem:

Customer is getting following errors on RHEL8 nodes in their OCP 4.12.x environment,

~~~

 2024-04-22T04:17:26.519783952Z 2024-04-22 04:17:26,519 ERROR    tuned.utils.commands: Error when reading file '/sys/block/sdbu/queue/read_ahead_kb': '[Errno 2] No such file or directory: '/sys/block/sdbu/queue/read_ahead_kb''

~~~

~~~

$ oc logs tuned-9kvls -n openshift-cluster-node-tuning-operator
2024-04-22T04:17:26.514455823Z 2024-04-22 04:17:26,514 ERROR    tuned.utils.commands: Error when reading file '/sys/block/dm-4/queue/read_ahead_kb': '[Errno 2] No such file or directory: '/sys/block/dm-4/queue/read_ahead_kb''
2024-04-22T04:17:26.514455823Z 2024-04-22 04:17:26,514 ERROR    tuned.utils.commands: Writing to file '/sys/block/dm-4/queue/read_ahead_kb' error: '[Errno 2] No such file or directory: '/sys/block/dm-4/queue/read_ahead_kb''
2024-04-22T04:17:26.519783952Z 2024-04-22 04:17:26,519 ERROR    tuned.utils.commands: Error when reading file '/sys/block/sdbu/queue/read_ahead_kb': '[Errno 2] No such file or directory: '/sys/block/sdbu/queue/read_ahead_kb''

~~~

Additional Info:

Similar errors reported in the below issue tracker is already addressed.

https://issues.redhat.com/browse/RHEL-11342