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Title: Resize live UFS filesystem on FreeBSD 11 |
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Author: Solène |
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Date: 17 May 2016 |
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Tags: freebsd11 |
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Description: |
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I am using FreeBSD in virtual machines and sometimes I need to |
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increase the disk capacity of the storage. From your VM Host, increase |
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the capacity of the storage backend, then on the FreeBSD system (10.3 |
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when writing), you should see this in the last line of _dmesg_. |
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Use `gpart commit vtbd0` to save changes or `gpart undo vtbd0` to |
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revert them. |
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Here is the `gpart show` output on the system: |
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34 1024 1 freebsd-boot (512K) |
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1058 159382528 2 freebsd-ufs (76G) |
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159383586 8388540 3 freebsd-swap (4.0G) |
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167772126 167772161 - free - (80G) |
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The process is a bit harder here because I have my partition swap at |
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the end of the storage, so if I want to increase the size of the ufs |
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partition, I will need to remove the swap partition, increase the data |
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partition and recreate the swap. This is not that hard but having the |
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freebsd-ufs partition at the end would have been easier. |
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1. swapoff the device : **`swapoff /dev/vtbd0p3`** |
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2. delete the swap partition : **`gpart delete -i 3 vtbd0`** |
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3. resize the freebsd-ufs partition : **`gpart resize -i 2 -a 4k -s |
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156G vtbd0`** |
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4. create the swap : **`gpart add -t freebsd-swap -a 4k vtbd0`** |
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5. swapon : **`swapon /dev/vtbd0p3`** |
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6. tell UFS to resize : **`growfs /`** |
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If freebsd-ufs was the latest in the gpart order, only steps 3 and 6 |
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would have been necessary. |
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Sources: [FreeBSD |
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Handbook](https://www.freebsd.org/doc/handbook/disks-growing.html) and |
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[gpart(8)](https://www.freebsd.org/cgi/man.cgi?gpart%288%29) |
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