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When using ZFS on FreeBSD, how can we see how much space is used and how much is available in storage drives (hard disk, SSD, etc.)?

For example, spinning up a virtual machine instance of FreeBSD on DigitalOcean comes with a certain amount of storage. How can I verify the size of that virtual drive?

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  • Try: zfs list
    – Richard Smith
    Jul 13, 2019 at 20:16
  • @RichardSmith Thanks. I made an Answer of your Comment.
    – Basil Bourque
    Jul 13, 2019 at 20:26

2 Answers 2

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zfs list

Use the list option on the zfs command built into FreeBSD. 

zfs list

Example:

$ zfs list
NAME                 USED  AVAIL  REFER  MOUNTPOINT
zroot               4.41G  17.4G    88K  none
zroot/ROOT          3.49G  17.4G    88K  none
zroot/ROOT/default  3.49G  17.4G  3.15G  legacy
zroot/tmp            112K  17.4G   112K  /tmp
zroot/usr            947M  17.4G    88K  /usr
zroot/usr/home       184K  17.4G   128K  /usr/home
zroot/usr/ports      947M  17.4G   947M  /usr/ports
zroot/usr/src         88K  17.4G    88K  /usr/src
zroot/var            792K  17.4G    88K  /var
zroot/var/audit       88K  17.4G    88K  /var/audit
zroot/var/crash       88K  17.4G    88K  /var/crash
zroot/var/log        348K  17.4G   348K  /var/log
zroot/var/mail        92K  17.4G    92K  /var/mail
zroot/var/tmp         88K  17.4G    88K  /var/tmp
$

Learn more on the zfs man page. The zfs command has many options for controlling the rich features of the ZFS file system.

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1

For ZVOLs use this one:

# zfs get volsize
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