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Difference between revisions of "Btrfs"
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When you changed RAID-levels (for example from RAID 0 to RAID 1) there is no automatic duplication of the chunks. Only when writing further, btrfs will respect the changed RAID-level. This may not be what you intended. To complete the conversion to another RAID-level you need to tell btrfs to rewrite chunks where needed. You do this with a manual balance: | When you changed RAID-levels (for example from RAID 0 to RAID 1) there is no automatic duplication of the chunks. Only when writing further, btrfs will respect the changed RAID-level. This may not be what you intended. To complete the conversion to another RAID-level you need to tell btrfs to rewrite chunks where needed. You do this with a manual balance: | ||
=== Metadata === | === Metadata === <!--T:149--> | ||
It is rarely recommended to include blocks with metadata in a balance. It is advantageous, in exceptional cases, if the following conditions are currently met: | It is rarely recommended to include blocks with metadata in a balance. It is advantageous, in exceptional cases, if the following conditions are currently met: | ||
You can check with: | You can check with: | ||
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}} | }} | ||
=== Get out of jail === | === Get out of jail === <!--T:150--> | ||
This said, there is an '''easy way out''': Give btrfs more space ;-) | This said, there is an '''easy way out''': Give btrfs more space ;-) | ||
* '''add a (unformatted) partition''' (for example a fast extern USB-Stick with 8GB) to the btrfs-volume with{{RootCmd|command=btrfs device add /dev/[sdz4] /}} | * '''add a (unformatted) partition''' (for example a fast extern USB-Stick with 8GB) to the btrfs-volume with{{RootCmd|command=btrfs device add /dev/[sdz4] /}} | ||