How do I resize ZVOL?

How do I resize ZVOL?

Right click on the Primary partition (zvol) to drop down a list and click on Extend Volume.

What is ZVOL in Truenas?

A ZFS Volume (Zvol) is a dataset that represents a block device. These are needed when configuring an iSCSI Share. To create a zvol in a pool, go to Storage > Pools then click and Add Zvol.

What is ADD zvol?

A ZVOL is a ZFS block device that resides in your storage pool. This means that the single block device gets to take advantage of your underlying RAID array, such as mirrors or RAID-Z. It gets to take advantage of the copy-on-write benefits, such as snapshots.

What is a ZVOL in Freenas?

A zvol is a feature of ZFS that creates a raw block device over ZFS. This allows you to use a zvol as an iSCSI device extent. To create a zvol, select an existing ZFS volume or dataset from the tree then click “Create zvol” to open the screen shown in Figure 8.1e.

Can you expand a ZVOL?

In ZFS, there are two types of filesystems (datasets and zvol). The ZFS dataset can be grown by setting the quota and reservation properties. But zvols have to extend by setting the volsize property to a new size.

Can you expand ZFS pool?

For example, if you run a ZFS pool based on a single 3-disk RAIDZ vdev (RAID5 equivalent 2), the only way to expand a pool is to add another 3-disk RAIDZ vdev 1. You can’t just add a single disk to the existing 3-disk RAIDZ vdev to create a 4-disk RAIDZ vdev because vdevs can’t be expanded.

Can RAIDz2 be expanded?

So a RAIDz2 vdev expanded from six disks to ten will still be full of six-wide stripes after expansion completes. So while the user will see the extra space made available by the new disks, the storage efficiency of the expanded data will not have improved due to the new disks.

What is the difference between TrueNAS core and scale?

TrueNAS Scale feels like TrueNAS Core, but with better virtualization and Kubernetes support. It feels like it grew up as a NAS and then added features more in-line with some of what Synology and QNAP offer, with a critical difference: there is the promise of scale-out using Gluster and ZFS.

How do I shrink a ZFS file system?

1. add a temp disk/file vdev to the pool with smaller size, but is enough to hold all existing data (including snapshots etc) 2. remove the old vdev 3. possibly re-partition old vdev to smaller size, or replace with a smaller disk 4.