btrfs-replace - replace devices managed by btrfs with other device.
btrfs replace <subcommand> <args>
is used to replace btrfs managed devices with other device.
Cancel a running device replace
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
, otherwise it 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>
the filesystem has to be resized to fully take advantage of a larger target
device, this can be achieved with btrfs filesystem resize <devid>:max
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)
force using and overwriting
even if it looks like containing a valid btrfs
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>
no background replace.
Print status and progress information of a
running device replace operation.
print once instead of print continuously until
the replace operation finishes (or is cancelled)
returns a zero exit status if it succeeds. Non zero is
returned in case of failure.
is part of btrfs-progs. Please refer to the btrfs wiki
for further details.