BTRFS-REPLACE(8) Btrfs Manual BTRFS-REPLACE(8)NAMEbtrfs-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.
Note: this is not currently supported for RAID5/6 profiles and must use
the device add/delete workaround.
It is recommended to see btrfs-device(8) for more details about btrfs
device management.
SUBCOMMAND
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)
cancel <mount_point>
Cancel a running device replace operation.
EXIT STATUS
btrfs replace returns a zero exist 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
http://btrfs.wiki.kernel.org for further details.
SEE ALSOmkfs.btrfs(8), btrfs-device(8),
Btrfs v3.14.2 05/30/2014 BTRFS-REPLACE(8)
