2 days new MBP / Partition error & Filevault freeze

Hi all,

I just get a brand new MBP. Unfortunately I can't create a new partition (from Boot camp or Disk Utility)

It seems that the problem is due to the activation of FileVault (which is always asking me to plug the book in order to finish encryption... but when i plug it .. nothing change)

My question is :

May I will have trouble if I reformat the disk entirely (no precious data on it) ?

I want to do it without any risk of crashing definitely the disk.. ( core storage story blablabla ..)

I saw many topics with people trying to play with partition (in order to save or erase or modify ..) no success.

- I tried to do a re install from the cmd + R

-> No change

I just want to have again this yosemite "setup" that you have when you open the box from apple...

I hope my question is clear.

Thx

diskutil :

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 999.7 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *999.4 GB disk1

Logical Volume on disk0s2

C8B8E6A4-7EB0-4425-AFAD-D5F99118CFD2

Unlocked Encrypted

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 4C898967-E35A-4907-8134-A1411DB15221

=========================================================

Name: Macintosh HD

Status: Online

Size: 999695822848 B (999.7 GB)

Free Space: 0 B (0 B)

|

+-< Physical Volume FB5B0AD1-8040-4264-8497-D7BB95B120FA

| ----------------------------------------------------

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 999695822848 B (999.7 GB)

|

+-> Logical Volume Family D89D0263-4B09-47A4-856F-FA2CB892C78E

----------------------------------------------------------

Encryption Status: Unlocked

Encryption Type: AES-XTS

Conversion Status: Converting

Conversion Direction: forward

Has Encrypted Extents: Yes

Fully Secure: No

Passphrase Required: Yes

|

+-> Logical Volume C8B8E6A4-7EB0-4425-AFAD-D5F99118CFD2

---------------------------------------------------

Disk: disk1

Status: Online

Size (Total): 999376945152 B (999.4 GB)

Conversion Progress: Paused

Revertible: No

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS