SOLVED Error when trying to use zfs send to move data.

[ChinookTx]

I'm trying to move a dataset from one volume to another. I created a manual recursive snapshot. I'm now getting an error when issuing the zfs move command:

Code:

[root@freenas] /# zfs send -vR Volume3/Music@manual-20160421 | zfs receive -vF Volume1
full send of Volume3/Music@manual-20160421 estimated size is 29.4G
total estimated size is 29.4G
TIME        SENT   SNAPSHOT
cannot unmount '/var/db/system': Device busy
warning: cannot send 'Volume3/Music@manual-20160421': signal received

Anything I am doing wrong?

Code:

[root@freenas] /# zfs list
NAME                                                       USED  AVAIL  REFER  MOUNTPOINT
Volume1                                                   1.93T  3.17T   372K  /mnt/Volume1
...
Volume3                                                    989G   809G   104K  /mnt/Volume3
Volume3/Music                                             28.9G   809G  28.9G  /mnt/Volume3/Music
...

 

[depasseg]

Can you give us the whole zfs list. my guess is your system dataset is under Volume1, and the receive is trying to overwrite it.

 

[ChinookTx]

Code:

[root@freenas] ~# zfs list
NAME                                                       USED  AVAIL  REFER  MOUNTPOINT
Volume1                                                   1.93T  3.17T   372K  /mnt/Volume1
Volume1/.system                                            237M  3.17T   174K  legacy
Volume1/.system/configs-0dc2ca1e7fa9464d8c4d7c4fd81f6855  14.1M  3.17T  14.1M  legacy
Volume1/.system/configs-241bf4dd02d1413596a7e0d91081dbbf   604K  3.17T   604K  legacy
Volume1/.system/configs-4fbef5c472fe4bc7b1b21c7f8739b229  48.1M  3.17T  48.1M  legacy
Volume1/.system/cores                                     92.2M  3.17T  92.2M  legacy
Volume1/.system/rrd-0dc2ca1e7fa9464d8c4d7c4fd81f6855       140K  3.17T   140K  legacy
Volume1/.system/rrd-241bf4dd02d1413596a7e0d91081dbbf       140K  3.17T   140K  legacy
Volume1/.system/rrd-4fbef5c472fe4bc7b1b21c7f8739b229       186K  3.17T   186K  legacy
Volume1/.system/samba4                                    51.3M  3.17T  51.3M  legacy
Volume1/.system/syslog-0dc2ca1e7fa9464d8c4d7c4fd81f6855   9.71M  3.17T  9.71M  legacy
Volume1/.system/syslog-241bf4dd02d1413596a7e0d91081dbbf    703K  3.17T   703K  legacy
Volume1/.system/syslog-4fbef5c472fe4bc7b1b21c7f8739b229   19.2M  3.17T  19.2M  legacy
Volume1/Marie                                             1.93T  3.17T  1.93T  /mnt/Volume1/Marie
Volume1/jails                                              140K  3.17T   140K  /mnt/Volume1/jails
Volume2                                                    762G  1.01T    96K  /mnt/Volume2
Volume2/iSCSIVol2                                          762G  1.10T   667G  -
Volume3                                                    989G   809G   104K  /mnt/Volume3
Volume3/Marie                                              398G   809G   398G  /mnt/Volume3/Marie
Volume3/Music                                             28.9G   809G  28.9G  /mnt/Volume3/Music
Volume3/Pictures                                          15.3G   809G  15.3G  /mnt/Volume3/Pictures
Volume3/Software                                          45.9G   809G  22.1G  /mnt/Volume3/Software
Volume3/Software/OS_ISOs                                  23.8G   809G  23.8G  /mnt/Volume3/Software/OS_ISOs
Volume3/Videos                                             498G   809G   498G  /mnt/Volume3/Videos
Volume3/jails                                             1.94G   809G   120K  /mnt/Volume3/jails
Volume3/jails/.warden-template-pluginjail                  469M   809G   469M  /mnt/Volume3/jails/.warden-template-pluginjail
Volume3/jails/.warden-template-pluginjail-9.3-x64          449M   809G   449M  /mnt/Volume3/jails/.warden-template-pluginjail-9.3-x64
Volume3/jails/plexmediaserver_1                           1.04G   809G  1.50G  /mnt/Volume3/jails/plexmediaserver_1
Volume3/tftp                                               944K   809G   944K  /mnt/Volume3/tftp
freenas-boot                                              1.04G  14.3G    31K  none
freenas-boot/ROOT                                         1.02G  14.3G    25K  none
freenas-boot/ROOT/9.10-STABLE-201604140622                9.12M  14.3G   506M  /
freenas-boot/ROOT/9.10-STABLE-201604181743                1.01G  14.3G   468M  /
freenas-boot/ROOT/Initial-Install                            1K  14.3G   493M  legacy
freenas-boot/ROOT/default                                   47K  14.3G   494M  legacy
freenas-boot/grub                                         19.0M  14.3G  6.33M  legacy

 

[depasseg]

Yep, that's it. So, a question. Do you intend to completely destroy Volume1/.system, Marie and Jails? Because that's what would have happened if the .system dataset wasn't on Volume1. Or did you want Volume3/Music to go into Volume1/Music?

 

[ChinookTx]

Cr@p... no, I don't want to destroy Volume1, I'd be shot and killed on the spot!!! I want volume3/music to go in volume1/music. Do I need to create the dataset "Music" first on Volume1?

 

[depasseg]

Do I need to create the dataset "Music" first on Volume1?

yes, and then the receive target is Volume1/Music

 

[ChinookTx]

Whew... that was a close call... :-/ Can you say "lucky"???

Thanks for your help depasseg. It's happily copying now (and hopefully not destroying 2TB of my wife's archives!).

 

[depasseg]

Fwew! Glad it's working.