Error creating a RAIDZ

[JLopPer]

Hi everyone!!

I'm making practise with a NAS and I can't create a new RAIDZ with 3 hard drives. When I click on "Add volume" appears this message:
Unable to GPT format the disk "ada0"

I tried to export the volume marking to destroy the data, rebooting and trying to create the volume another time and it's appears the same message.

It's like the old configuration of the RAID can't be deleted, when I click on autoimport volume (after exporting it) appears the old RAID I create.

Can somebody help me?? Thanks!

[ProtoSD]

Can you post the output of "gpart show" from the command line?

Also, what version are you using and which CPU?

[JLopPer]

FreeNAS Build FreeNAS-8.0.3-RELEASE-p1-x64 (9591)
Platform Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz

the gpart show

=> 63 15646617 da0 MBR (7.5G)
63 1930257 1 freebsd [active] (943M)
1930320 63 - free - (32K)
1930383 1930257 2 freebsd (943M)
3860640 3024 3 freebsd (1.5M)
3863664 41328 4 freebsd (20M)
3904992 11741688 - free - (5.6G)

=> 0 1930257 da0s1 BSD (943M)
0 16 - free - (8.0K)
16 1930241 1 !0 (943M)

=> 34 976773101 ada1 GPT (466G)
34 94 - free - (47K)
128 4194304 1 freebsd-swap (2.0G)
4194432 972578703 2 freebsd-ufs (464G)

[JLopPer]

Ok i have fixed the problem right now. The NAS was rebuilding and this is the cause because I couldn't delete or create a new volumen. Thank you so much!