btrfs-replace (8)
Leading comments
Title: btrfs-replace
Author: [FIXME: author] [see http://docbook.sf.net/el/author]
Generator: DocBook XSL Stylesheets v1.79.0 <http://docbook.sf.net/>
Date: 07/28/2017
Manual: Btrfs Manual
Source: Btrfs v4.12
Language: English
NAME
btrfs-replace - replace devices managed by btrfs with other device.SYNOPSIS
btrfs replace <subcommand> <args>
DESCRIPTION
btrfs replace is used to replace btrfs managed devices with other device.
SUBCOMMAND
cancel <mount_point>
- Cancel a running device replace operation.
start [-Bfr] <srcdev>|<devid> <targetdev> <path>
-
Replace device of a btrfs filesystem.
On a live filesystem, duplicate the data to the target device which is currently stored on the source device. If the source device is not available anymore, or if the -r option is set, the data is built only using the RAID redundancy mechanisms. After completion of the operation, the source device is removed from the filesystem. If the <srcdev> is a numerical value, it is assumed to be the device id of the filesystem which is mounted at <path>, otherwise is is the path to the source device. If the source device is disconnected, from the system, you have to use the devid parameter format. The <targetdev> needs to be same size or larger than the <srcdev>.
Options
-r
- only read from <srcdev> if no other zero-defect mirror exists. (enable this if your drive has lots of read errors, the access would be very slow)
-f
-
force using and overwriting
<targetdev>
even if it looks like containing a valid btrfs filesystem.
A valid filesystem is assumed if a btrfs superblock is found which contains a correct checksum. Devices which are currently mounted are never allowed to be used as the <targetdev>.
-B
- no background replace.
status [-1] <mount_point>
-
Print status and progress information of a running device replace operation.
Options
-1
- print once instead of print continuously until the replace operation finishes (or is canceled)
EXIT STATUS
btrfs replace returns a zero exit status if it succeeds. Non zero is returned in case of failure.
AVAILABILITY
btrfs is part of btrfs-progs. Please refer to the btrfs wiki m[blue]btrfs.wiki.kernel.orgm[] for further details.