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NAME | SYNOPSIS | DESCRIPTION | SUBCOMMAND | EXIT STATUS | AVAILABILITY | SEE ALSO | COLOPHON |
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BTRFS-REPLACE(8) Btrfs Manual BTRFS-REPLACE(8)
btrfs-replace - replace devices managed by btrfs with other device.
btrfs replace <subcommand> <args>
btrfs replace is used to replace btrfs managed devices with other
device.
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 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>.
Note
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 /path
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
it contains a valid btrfs filesystem.
A valid filesystem is assumed if a btrfs superblock is found
which contains a correct checksum. Devices that 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 cancelled)
btrfs replace returns a zero exit status if it succeeds. Non zero is
returned in case of failure.
btrfs is part of btrfs-progs. Please refer to the btrfs wiki
http://btrfs.wiki.kernel.org for further details.
mkfs.btrfs(8), btrfs-device(8),
This page is part of the btrfs-progs (btrfs filesystem tools)
project. Information about the project can be found at
⟨https://btrfs.wiki.kernel.org/index.php/Btrfs_source_repositories⟩.
If you have a bug report for this manual page, see
⟨https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#How_do_I_report_bugs_and_issues.3F⟩.
This page was obtained from the project's upstream Git repository
⟨git://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git⟩
on 2018-02-02. (At that time, the date of the most recent commit
that was found in the repository was 2018-01-05.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
Btrfs v4.6.1 01/23/2018 BTRFS-REPLACE(8)
Pages that refer to this page: btrfs(8), btrfs-device(8)
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