Buffalo NAS LS-421DE can't mount disk after using delete user data partion??

[sairy]

Hi everyone, I really need your help, I want to get mad with my Buffalo LS-421DE.
After a time using, I want to format disk but the processing was too long and I can't wait, after that turn off NAS and turn on but the processing was still running. And I used debug mode to force update my NAS, I ticked on all the option in debug:


When the update finish, the disk 1 cannot mount and have error, when I plugged disk 2 onto the NAS, the NAS could not find the disk and I rediscovered disk, they worked but the status is unformat but I can't finish the format process. Does my NAS got brick?




Can you help me fix this, I updated a newest firmware from Website but no works.
Thank you so much

[bally]

format the disks externally, delete partition, put them inside the unit and update the firmware