set device mode permanently with udev rule Post: 302574457

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Operating Systems Linux Red Hat set device mode permanently with udev rule Post 302574457 by hergp on Thursday 17th of November 2011 10:27:05 AM

11-17-2011

Registered User

set device mode permanently with udev rule

On a test server running CentOS 6, I try to permanently set the owner, group and mode of disk devices for use with a DB2 database. For this I created an udev rule file /etc/udev/rules.d/99-db2.rules:

Code:

KERNEL=="sdb[1-9]*", OWNER="db2usrl1", GROUP="db2adml1", MODE="0600"

After a reboot, the owner and group of all sdb* devices is correct, but the device mode stays 0660. As far as I can tell there is no error message.

When I try udevadm trigger, the same happens. For demonstration, I set owner, group and mode of a device, then run udevadm trigger and finally look at the result:

Code:

# chown 0:0 /dev/sdb21
# chmod 666 /dev/sdb21
# ls -l /dev/sdb21
brw-rw-rw-. 1 root root 259, 5 Nov 17 14:22 /dev/sdb21
# udevadm trigger
# ls -l /dev/sdb21
brw-rw----. 1 db2usrl1 db2adml1 259, 5 Nov 17 14:22 /dev/sdb21

Is this a bug or am I missing something?

hergp

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LEARN ABOUT CENTOS

vgremove

VGREMOVE(8)						      System Manager's Manual						       VGREMOVE(8)

NAME

       vgremove - remove a volume group

SYNOPSIS

       vgremove [-d|--debug] [-f|--force] [-h|-?|--help] [--noudevsync] [-t|--test] [-v|--verbose] VolumeGroupName [VolumeGroupName...]

DESCRIPTION

       vgremove  allows  you to remove one or more volume groups.  If one or more physical volumes in the volume group are lost, consider vgreduce
       --removemissing to make the volume group metadata consistent again.

       If there are logical volumes that exist in the volume group, a prompt will be given to confirm removal.	You can override the  prompt  with
       -f.

OPTIONS

       See lvm(8) for common options.

       -f, --force
	      Force the removal of any logical volumes on the volume group without confirmation.

       --noudevsync
	      Disable  udev  synchronisation. The process will not wait for notification from udev.  It will continue irrespective of any possible
	      udev processing in the background.  You should only use this if udev is not running or has rules that ignore the devices	LVM2  cre-
	      ates.

SEE ALSO

       lvm(8), lvremove(8), vgcreate(8), vgreduce(8)

Sistina Software UK				     LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26)					       VGREMOVE(8)