Make a disk bigger
You can make a disk bigger on your server while it’s in use. BeamDisk notices the new size and, with Use the New Space, grows the disk’s APFS volume to fill it. Your files stay as they are.
Grow a disk
Section titled “Grow a disk”- On your server, make the disk bigger: on TrueNAS, edit the zvol and raise its size. Keep it a whole number of MiB or GiB.
- In BeamDisk, open the disk’s page. Once the server reports the change, it says Grew on the server, with the old and new sizes.
- Quit the apps using the disk, then click Use the New Space… and confirm with Use the New Space.
- BeamDisk ejects the disk for a moment, connects it again at its new size, extends its partition table if it has one, and attaches it again. The sidebar’s message line follows each step.
- The last step, growing the volume into the new space, is one macOS lets only Terminal or Disk Utility do, not an App Store app, so BeamDisk shows the command. Click Copy Command, paste it into Terminal and press Return.
The command is macOS’s own, of the form diskutil apfs resizeContainer disk13 0, with your disk’s number in it. It takes a moment and needs no administrator password.
If you clicked Later
Section titled “If you clicked Later”The disk’s page reminds you while space is unused: 12 GB of this disk isn’t used yet: its volume is smaller than the disk. Use the New Space grows it. Clicking Use the New Space… again goes straight to the command, without ejecting the disk.
Disks that aren’t APFS
Section titled “Disks that aren’t APFS”For a disk with no APFS volume (Mac OS Extended, for example), BeamDisk connects it at the new size and says It has no APFS container to grow; Disk Utility can resize its volume. Resize it in Disk Utility.
Don’t make a disk smaller
Section titled “Don’t make a disk smaller”A disk made smaller on the server loses whatever was past its new end. BeamDisk says so: Smaller on the server now, with the old and new sizes, and Check the server before using it: what was past the new end isn’t there any more.