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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit the rules are in place since at least 2019 and with 7.2 now fire errors Sep 11 15:30:55 testserver (udev-worker)[321]: sdb: /etc/udev/rules.d/80-mq-deadline.rules:1 ATTR{queue/scheduler}="mq-deadline": Failed to write "mq-deadline" to sysfs attribute "queue/scheduler", ignoring: Device or resource busy Sep 11 15:30:57 testserver (udev-worker)[462]: sdb: /usr/lib/udev/rules.d/60-block-scheduler.rules:3 ATTR{queue/scheduler}="bfq": Failed to write "bfq" to sysfs attribute "queue/scheduler", ignoring: Device or resource busy Sep 11 15:30:57 testserver (udev-worker)[462]: sdb: /etc/udev/rules.d/80-mq-deadline.rules:1 ATTR{queue/scheduler}="mq-deadline": Failed to write "mq-deadline" to sysfs attribute "queue/scheduler", ignoring: Device or resource busy [root@testserver:~]$ cat /etc/udev/rules.d/80-mq-deadline.rules ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/scheduler}="mq-deadline" [root@testserver:~]$ cat /usr/lib/udev/rules.d/60-block-scheduler.rules ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", \ KERNEL=="mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|sd*[!0-9]|sr*", \ ATTR{queue/scheduler}="bfq" [root@testserver:~]$ uname -a Linux testserver.rhsoft.net 7.2.4-200.fc44.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Sep 7 19:10:19 UTC 2026 x86_64 GNU/Linux