Can I add drives to a ZFS pool?

Can I add drives to a ZFS pool?

Expanding storage in ZFS The heart of a ZFS storage system is the zpool —this is the most fundamental level of ZFS storage. A storage vdev can be one of five types—a single disk, mirror, RAIDz1 , RAIDz2 , or RAIDz3 . You can add more vdevs to a zpool , and you can attach more disks to a single or mirror vdev .

Can you add drives to Raidz?

2 Answers. You can’t expand an existing raidz vdev, you have to blow it away and create it again with the new drive(s). See the other answer for better details. Side note: Someone actually worked out that it’s technically possibly to add drives to a raidz, but the functionality hasn’t been implemented.

Can you expand a Vdev?

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. The impact of this limitation is that you have to buy all storage upfront even if you don’t need the space for years to come.

How do I add a hard drive to ZFS?

Add drive to ZFS pool

1. Replicate your pool to your backup array.
2. Scrub your backup array (NOT OPTIONAL.
3. Destroy your main pool, and remake the vdev’s how you want.
4. Replicate the data back to your main pool from the backup.
5. Scrub the main pool (Also not optional) and check that everything’s there.

How do I expand my ZFS pool?

Once all disks in a vdev are replaced by larger ones, you can expand the pool by running zpool online -e or by having the autoexpand property set to on (though I wouldn’t really recommend the latter; pool expansion should be a conscious decision).

How do I extend my FreeNAS pool?

9.2. 6. Extending a Pool

1. to extend a ZFS stripe, add one or more disks.
2. to extend a ZFS mirror, add the same number of drives.
3. to extend a three drive RAIDZ1, add three additional drives.
4. to extend a RAIDZ2 requires a minimum of four additional drives.

Can you expand a FreeNAS pool?

The OpenZFS team loves to tease easy expansions but, even now 3 years later, you still cannot live expand a FreeNAS ZFS Storage Pool. Basically you replace every drive sequentially with a larger drive and then ZFS will automatically make the pool larger when every drive is replaced.

How do I extend my ZFS pool?

How many drives can I add to RAID 1?

No matter how many drives you add to RAID 1, the size never increases. What you increase is how many drives can fail and how good your read performance is. So 2x 1TB drives in RAID 1 = 1TB. 20x 1T drives in RAID 1 = 1TB. It never changes. The size is always the size of the smallest drive in the array.

Can you use raidz1 with a 3TB drive?

First advice would be to NOT use RaidZ1 with 3TB drives – certainly not with 10TB drives. If I were you, I would create a separate 6 disk RaidZ2 vDev with the new 10TB disks (recommend burning in the drives). Once this is ready, copy all of your data to this new pool.

Can you add a disk to a RAID Z vdev?

ZFS doesn’t support adding disks to raid-z vdevs (yet). You can rebuild the array if you want, but your other option is to turn your stripe vdev into a mirror by adding another drive of the same size to that vdev.

Do you have to match drives in raid?

Never mismatch drives or you are increasing wear and tear while hurting performance. RAID sizes from the smallest drive in the array and anything larger is a waste. You get your best performance when the drives all work together, rather than against each other. So they need to be matched in every way for optimum performance.