123 lines
3.9 KiB
ReStructuredText
123 lines
3.9 KiB
ReStructuredText
|
btrfs-replace(8)
|
||
|
|
================
|
||
|
|
|
||
|
|
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 [options] <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.
|
||
|
|
--enqueue
|
||
|
|
wait if there's another exclusive operation running, otherwise continue
|
||
|
|
-K|--nodiscard
|
||
|
|
Do not perform whole device TRIM operation on devices that are capable of that.
|
||
|
|
This does not affect discard/trim operation when the filesystem is mounted.
|
||
|
|
Please see the mount option 'discard' for that in `btrfs`(5).
|
||
|
|
|
||
|
|
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)
|
||
|
|
|
||
|
|
|
||
|
|
EXAMPLES
|
||
|
|
--------
|
||
|
|
|
||
|
|
Replacing an online drive with a bigger one
|
||
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
|
||
|
|
Given the following filesystem mounted at `/mnt/my-vault`
|
||
|
|
|
||
|
|
|
||
|
|
.. code-block:: none
|
||
|
|
Label: 'MyVault' uuid: ae20903e-b72d-49ba-b944-901fc6d888a1
|
||
|
|
Total devices 2 FS bytes used 1TiB
|
||
|
|
devid 1 size 1TiB used 500.00GiB path /dev/sda
|
||
|
|
devid 2 size 1TiB used 500.00GiB path /dev/sdb
|
||
|
|
|
||
|
|
In order to replace */dev/sda* (*devid 1*) with a bigger drive located at
|
||
|
|
*/dev/sdc* you would run the following:
|
||
|
|
|
||
|
|
.. code-block:: bash
|
||
|
|
btrfs replace start 1 /dev/sdc /mnt/my-vault/
|
||
|
|
|
||
|
|
You can monitor progress via:
|
||
|
|
|
||
|
|
.. code-block:: bash
|
||
|
|
btrfs replace status /mnt/my-vault/
|
||
|
|
|
||
|
|
After the replacement is complete, as per the docs at ``btrfs-filesystem(8)`` in
|
||
|
|
order to use the entire storage space of the new drive you need to run:
|
||
|
|
|
||
|
|
.. code-block:: bash
|
||
|
|
btrfs filesystem resize 1:max /mnt/my-vault/
|
||
|
|
|
||
|
|
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 http://btrfs.wiki.kernel.org for
|
||
|
|
further details.
|
||
|
|
|
||
|
|
SEE ALSO
|
||
|
|
--------
|
||
|
|
|
||
|
|
``mkfs.btrfs(8)``,
|
||
|
|
``btrfs-device(8)``,
|
||
|
|
``btrfs-filesystem(8)``,
|