blkdeactivate(8) [centos man page]

BLKDEACTIVATE(8)														  BLKDEACTIVATE(8)

NAME

       blkdeactivate - utility to deactivate block devices

SYNOPSIS

       blkdeactivate [options] [device...]

DESCRIPTION

       blkdeactivate  utility deactivates block devices. If a device is mounted, the utility can unmount it automatically before trying to deacti-
       vate. The utility currently supports device-mapper devices, including LVM volumes.  LVM volumes are handled directly using the lvm command.
       Other device-mapper based devices are handled using the dmsetup command.

OPTIONS

       -e, --errors
	      Show errors reported from tools called by blkdeactivate.	Without this option, any error messages from these external tools are sup-
	      pressed and the blkdeactivate itself provides only a summary message about device being skipped or not.

       -h, --help
	      Display the help text.

       -u, --umount
	      Unmount a mounted device before trying to deactivate it.	Without this option used, a device that is mounted is not deactivated.

       -v, --verbose
	      Run in verbose mode.

       -d, --dmoption dm_options
	      Comma separated list of device-mapper specific options.

       -l, --lvmoption lvm_options
	      Comma separated list of LVM specific options.

DM_OPTIONS
       retry  Retry removal several times in case of failure.

       force  Force device removal. See dmsetup(8) for more information.

LVM_OPTIONS
       retry  Retry removal several times in case of failure.

       wholevg
	      Deactivate the whole LVM Volume Group when processing a Logical Volume.  Deactivating Volume Group as a whole takes less	time  than
	      deactivating each Logical Volume separately.

EXAMPLES

       Deactivate all supported block devices found in the system. If a device is mounted, skip its deactivation.

       blkdeactivate

       Deactivate all supported block devices found in the system. If a device is mounted, unmount it first if possible.

       blkdeactivate -u

       Deactivate supplied device together with all its holders. If any of the devices processed is mounted, unmount it first if possible.

       blkdeactivate -u /dev/vg/lvol0

       Deactivate  all	supported  block  devices found in the system. Retry deactivation of device-mapper devices in case the deactivation fails.
       Deactivate the whole Volume Group at once when processing an LVM Logical Volume.

       blkdeactivate -u -d retry -l wholevg

       Deactivate all supported block devices found in the system. Retry deactivation of device-mapper devices in case the deactivation fails  and
       force removal.

       blkdeactivate -d force,retry

SEE ALSO

       lsblk(8) umount(8) dmsetup(8) lvm(8)

Red Hat, Inc					     LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26)					  BLKDEACTIVATE(8)

Check Out this Related Man Page

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

NAME

       fsfreeze - suspend access to an filesystem (Linux Ext3/4, ReiserFS, JFS, XFS).

SYNOPSIS

       fsfreeze -f mountpoint

       fsfreeze -u mountpoint

DESCRIPTION

       fsfreeze suspends and resumes access to an filesystem

       fsfreeze halts new access to the filesystem and creates a stable image on disk.	fsfreeze is intended to be used with hardware RAID devices
       that support the creation of snapshots.

       fsfreeze is unnecessary for device-mapper devices. The device-mapper (and LVM) automatically freezes filesystem on the device when a  snap-
       shot creation is requested.  For more details see the dmsetup(8) man page.

       The  mount-point  argument  is  the pathname of the directory where the filesystem is mounted.  The filesystem must be mounted to be frozen
       (see mount(8)).

OPTIONS

       -h, --help
	      Print help and exit.

       -f, --freeze
	      This option requests the specified a filesystem to be frozen from new modifications.  When this is selected,  all  ongoing  transac-
	      tions  in  the  filesystem  are  allowed to complete, new write system calls are halted, other calls which modify the filesystem are
	      halted, and all dirty data, metadata, and log information are written to disk.  Any  process  attempting	to  write  to  the  frozen
	      filesystem will block waiting for the filesystem to be unfrozen.

	      Note  that  even after freezing, the on-disk filesystem can contain information on files that are still in the process of unlinking.
	      These files will not be unlinked until the filesystem is unfrozen or a clean mount of the snapshot is complete.

       -u, --unfreeze
	      This option is used to un-freeze the filesystem and allow operations to continue.  Any filesystem modifications that were blocked by
	      the freeze are unblocked and allowed to complete.

AUTHOR

       Written by Hajime Taira.

NOTES

       This man page based on xfs_freeze.  One of -f or -u must be supplied to fsfreeze.

SEE ALSO

       mount(8)

AVAILABILITY

       The fsfreeze command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

								     May 2010							       FSFREEZE(8)

Linux and UNIX Man Pages

blkdeactivate(8) [centos man page]

Check Out this Related Man Page