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34 lines
1.3 KiB
ReStructuredText
34 lines
1.3 KiB
ReStructuredText
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Device add/removal
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The following subcommands exist for adding and removing devices from a
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mounted filesystem:
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- ``bcachefs device add``: Formats and adds a new device to an existing
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filesystem.
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- ``bcachefs device remove``: Permenantly removes a device from an
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existing filesystem.
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- ``bcachefs device online``: Connects a device to a running filesystem
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that was mounted without it (i.e. in degraded mode)
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- ``bcachefs device offline``: Disconnects a device from a mounted
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filesystem without removing it.
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- ``bcachefs device evacuate``: Migrates data off of a particular
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device to prepare for removal, setting it read-only if necessary.
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- ``bcachefs device set-state``: Changes the state of a member device:
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one of rw (readwrite), ro (readonly), failed, or spare.
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A failed device is considered to have 0 durability, and replicas on
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that device won’t be counted towards the number of replicas an extent
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should have by rereplicate - however, bcachefs will still attempt to
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read from devices marked as failed.
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The ``bcachefs device remove``, ``bcachefs device offline`` and
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``bcachefs device set-state`` commands take force options for when they
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would leave the filesystem degraded or with data missing. Todo:
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regularize and improve those options.
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