There is no software. It is hardware full disk encryption. Untill disk encryption is activated via Wave software, the disk is lock at startup. You can unlock with a preboot manager provide by wave.

When crypted disk is enable grub did not recognize the disk at first boot :

First boot, the disk preloader ask for the disk password.
After answer disk is decrypted "on the fly" but grup say : "error unknow filesystem"

I do a crtl + alt + suppr and computer reboot with disk uncrypt. This time grub works correctly.

Here are the infos about the disk on a dell latitude E6510 :

ATA device, with non-removable media
Model Number:       ST9250414ASG                           
Serial Number:      5VG493T5
Firmware Revision:  DED1   
Transport:          Serial
Standards:
Used: unknown (minor revision code 0x0029)
Supported: 8 7 6 5
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors:   16514064
LBA    user addressable sectors:  268435455
LBA48  user addressable sectors:  488397168
Logical/Physical Sector size:           512 bytes
device size with M = 1024*1024:      238475 MBytes
device size with M = 1000*1000:      250059 MBytes (250 GB)
cache/buffer size  = 16384 KBytes
Nominal Media Rotation Rate: 7200
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, no device specific minimum
R/W multiple sector transfer: Max = 1 Current = ?
Advanced power management level: 254
Recommended acoustic management value: 208, current value: 208
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
     Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
     Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
Enabled Supported:
   * SMART feature set
    Security Mode feature set
   * Power Management feature set
   * Write cache
   * Look-ahead
   * Host Protected Area feature set
   * WRITE_BUFFER command
   * READ_BUFFER command
   * NOP cmd
    DOWNLOAD_MICROCODE
   * Advanced Power Management feature set
    SET_MAX security extension
   * Automatic Acoustic Management feature set
   * 48-bit Address feature set
   * Mandatory FLUSH_CACHE
   * FLUSH_CACHE_EXT
   * SMART error logging
   * SMART self-test
   * General Purpose Logging feature set
   * WRITE_{DMA|MULTIPLE}_FUA_EXT
   * WRITE_DMA_QUEUED_FUA_EXT
   * 64-bit World wide name
   * IDLE_IMMEDIATE with UNLOAD
    Write-Read-Verify feature set
   * WRITE_UNCORRECTABLE_EXT command
   * {READ,WRITE}_DMA_EXT_GPL commands
   * Segmented DOWNLOAD_MICROCODE
   * Free-fall Control feature set
   * Gen1 signaling speed (1.5Gb/s)
   * Gen2 signaling speed (3.0Gb/s)
   * Native Command Queueing (NCQ)
   * Host-initiated interface power management
   * Phy event counters
    Device-initiated interface power management
   * Software settings preservation
   * SMART Command Transport (SCT) feature set
   * SCT Error Recovery Control (AC3)
   * SCT Features Control (AC4)
   * SCT Data Tables (AC5)
    unknown 206[12] (vendor specific)
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
supported: enhanced erase
54min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5000c5002ec5476c
NAA : 5
IEEE OUI : 000c50
Unique ID : 02ec5476c
Checksum: correct



and my partition table :
fdisk -l

Disque /dev/sda: 250.1 Go, 250059350016 octets
255 têtes, 63 secteurs/piste, 30401 cylindres
Unités = cylindres de 16065 * 512 = 8225280 octets
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identifiant de disque : 0x0004f32a

Périphérique Amorce  Début        Fin      Blocs     Id  Système
/dev/sda1   *           1          13      102400    7  HPFS/NTFS
La partition 1 ne se termine pas sur une frontière de cylindre.
/dev/sda2              13       16446   131994624    7  HPFS/NTFS
/dev/sda3           16446       16932     3906560   82  Linux swap / Solaris
/dev/sda4           16932       30402   108193792   83  Linux


thanks

Juju