While converting a basic disk, that contains your Windows 2000 boot partition, to dynamic disk, you receive:

STOP 0x0000007B Inaccessible boot device.

The basic disk contains an unsupported partition type, like an OEM diagnostic or configuration partition.

Windows 2000 supports the following basic disk partition types:

   Value   File system
  --------------------------------------------------------------------
  0x01    MS-DOS 12 bit FAT
  0x04    MS-DOS 16 Bit FAT
  0x05    Extended partition (holds logical drives)(LDM leaves intact)
  0x06    BIGDOS File Allocation Table (FAT)
  0x07    Installable File System (IFS), for example, HPFS and NTFS
  0x0B    Primary  Fat32 Partitions up to 2047 GB
  0x0C    Same as 0x0B, uses Logical Block Address Int 0x13 extensions
  0x0E    Same as 0x06, uses Logical Block Address Int 0x13 extensions
  0x0F    Same as 0x05, uses Logical Block Address Int 0x13 extensions
  0x12    Compaq EISA Utilities partition. (LDM leaves intact)
  0x84    Used by various manufacturers (Dell suspend to disk partition)
  0x86    Windows NT 4.0 fault tolerant partition indicator (FAT-FT)
  0x87    Windows NT 4.0 fault tolerant partition indicator (NTFS-FT)
Before you convert a basic disk, you must use Disk Management to remove the unsupported partition. This may alter the ARC path.