Day: October 16, 2021

TODO: Move dataset to another zpool in TrueNAS

Posted on by Bian Xi Leave a Comment on TODO: Move dataset to another zpool in TrueNAS

Move dataset to another zpool in TrueNAS

In Synology, move share folder to another volume is quite easy, can be done via UI interface. In TrueNAS, I could not find such task can be selected.

Duplicate dataset from snapshot

The workable solution is utilize the zfs command to duplicate in SSH environment, then export old pool and import new one.

First make a snapshot poolX/dataset@initial, then use following command duplicate zfs dataset snapshot to new zpool.

zfs send poolX/dataset@initial | zfs recv -F poolY/dataset

Update new dataset

Then make another snapshot poolX/dataset@incremental, then use following command update zfs dataset snapshot to new zpool.

zfs send -i initial poolX/dataset@incremental | zfs recv poolY/dataset

Activate new dataset

To make the new dataset usable, rollback snapshot needs to be performed for new dataset.

Update share

Change shared point to use new pool.

Update client

This is only required if client used server filesystem structure, such as NFS.

References

Migrate to smaller disk
*Note: pv (Pipe Viewer) command is not installed in TrueNAS by default.

Error replace hard disk in zpool in TrueNAS

Posted on by Bian Xi Leave a Comment on Error replace hard disk in zpool in TrueNAS

Error replace hard disk in zpool in TrueNAS

Got following error when trying to replace hard disk in zpool. Reboot is required.

middlewared.service_exception.CallError: [EFAULT] Partition type 6a898cc3-1dd2-11b2-99a6-080020736631 not found on sda

Partition exists

First issue with the partition which exists in the old hard disk. Use fdisk to remove all partitions. But still could not replace.

Use force option

Then click on force check box, the replacing was started, but stopped at 15%. Tried many times, but still failed. Search google, people got same issue, but they said sudden worked.

Run partprob

Run partprob, error shows the kernel didn't know the new partition table, reboot is required.

Check partition after reboot

After reboot, checked partition table, found TrueNAS had updated partition as others, which has one 2GB swap. Then force replace hard disk in pool again, then worked

Conclution

This is TrueNAS bug, which didn't close devices in kernel before repartition hard disk, this caused partition is opened and could not reread the new partition table into kernel.

Solution

Reboot

References

Cant create Pool on TrueNAS Scale (it does work on TrueNAS Core under same Hardware)
Cant create Pool on TrueNas Scale