59 lines
1.8 KiB
Markdown
59 lines
1.8 KiB
Markdown
# Remove a vdev from a zpool
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https://www.truenas.com/community/threads/remove-a-vdev-from-a-zpool.35608/
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Funny how two minds can think alike, that is exactly what I did and I like to write it down for further generations to come (or myself if I do it again) ;)
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```
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# zpool status -v tank
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pool: tank
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state: ONLINE
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NAME STATE READ WRITE CKSUM
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tank ONLINE 0 0 0
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mirror-0 ONLINE 0 0 0
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gptid/e41b2476-22bd-11e2-ac2d-3cd92b06cdcb ONLINE 0 0 0
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gptid/e4c521be-22bd-11e2-ac2d-3cd92b06cdcb ONLINE 0 0 0
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mirror-1 ONLINE 0 0 0
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gptid/b4580a46-2fcd-11e5-af9d-3cd92b06cdcb ONLINE 0 0 0
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gptid/b51e45b8-2fcd-11e5-af9d-3cd92b06cdcb ONLINE 0 0 0
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```
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First you have to remove one of the new drives from the mirror.
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`zpool detach tank /dev/gptid/b51e45b8-2fcd-11e5-af9d-3cd92b06cdcb`
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Then, create a new pool on the just detached drive
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`zpool create sonne /dev/gptid/b51e45b8-2fcd-11e5-af9d-3cd92b06cdcb`
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Now replicate all your data from the old filesystem to the new. (snd/rcv can take a while)
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```
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zfs snapshot -r tank@nas_backup
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zfs send -Rv tank@nas_backup | zfs receive -Fv sonne
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```
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To make FreeNAS aware of your newly created filesystem
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`zfs export sonne`
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Then, while in the WebGUI, click "Storage -> Import Volume" to import it.
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Since I found no other way, I manually changed all path (user home dir, shares etc.) to their new values.
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Reboot.
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Then comes the scary part
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```
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zpool destroy tank
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zpool attach sonne gptid/b51e45b8-2fcd-11e5-af9d-3cd92b06cdcb gptid/b4580a46-2fcd-11e5-af9d-3cd92b06cdcb
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```
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Then the resilvering will set in. Done.
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**Reminder:** During the whole process, there is no redundancy. If any drive fails, your data is gone.
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*By the way, if anyone knows how to tell FreeNAS (or ZFS) to not use gptid in "zpool status", instead make it look like https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/zfs-zpool.html, please PM me.*
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