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   btrfs-replace    ( 8 )

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Имя (Name)

btrfs-replace - replace devices managed by btrfs with other
       device.

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Синопсис (Synopsis)

btrfs replace <subcommand> <args>

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Описание (Description)

btrfs replace is used to replace btrfs managed devices with other
       device.

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Подкоманда (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

       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)

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Примеры (Examples)

Example 1. Replacing an online drive with a bigger one

       Given the following filesystem mounted at /mnt/my-vault

           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:

           btrfs replace start 1 /dev/sdc /mnt/my-vault/

       You can monitor progress via:

           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:

           btrfs filesystem resize 1:max /mnt/my-vault/

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Статус выхода (Exit)

btrfs replace returns a zero exit status if it succeeds. Non zero
       is returned in case of failure.

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Доступность (Availability)

btrfs is part of btrfs-progs. Please refer to the btrfs wiki
       http://btrfs.wiki.kernel.org for further details.

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Смотри также (See also)

mkfs.btrfs(8), btrfs-device(8), btrfs-filesystem(8),

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