Change new raw disk and stuck...

Hi, I have ReadyNAS Pro Pioneer Edition.

Disk configuration is ST1000528AS (1TB) X 6.
Raid type is X-RAID2 dual-redundancy.

Last saturday, bought new 3TB disk and change Disk 1.
I can see the message on front panel.
(New disk added, Testing, formatting...)
And then, I hope to see next message 'Resync 0,0%' , but can't see resync message.
It could be stuck.
Wait for about 30 minute... still stuck.

Replace new 3TB and reinsert new 1TB.
All step (New disk added, Testing, formatting, Resync) is proceed smoothly.
And recover is complle

I tried to format new 3TB with GPT partition on Windows 7 64bit.
(When connected new 3TB disk have 3 partition already. It is formatted by ReadyNAS).

And Re-Change Disk 1, All step (New disk added, Testing, formatting, Resync) is proceed smoothly.

Is it need to format new disk with GPT partition, before change disk on ReadyNAS? :?


Below is system log.

System.log
---------------------------------------------------------------------
Mar 2 16:02:54 enowy kernel: disk 4, o:1, dev:sde2
Mar 2 16:02:54 enowy kernel: disk 5, o:1, dev:sdf2
Mar 2 16:41:53 enowy kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
Mar 2 16:41:53 enowy kernel: ata1: irq_stat 0x00400000, PHY RDY changed
---------------------------------------------------------------------

Kernel.log
---------------------------------------------------------------------
Mar 2 16:02:54 enowy kernel: disk 4, o:1, dev:sde2
Mar 2 16:02:54 enowy kernel: disk 5, o:1, dev:sdf2
Mar 2 16:41:53 enowy kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
Mar 2 16:41:53 enowy kernel: ata1: irq_stat 0x00400000, PHY RDY changed
---------------------------------------------------------------------

16:03~ 16:40 is nothing...