SysLog for Internal Optical Drive Booting Success for HRev51877.
Notebook is ProBook 450 G3 (Skylake i5-6200) with Windows 7 and four partitions on hard drive.
Internal Optical Drive is detected as SCSI CD-ROM.
USB Controller is Intel SunrisePoint-LP USB 3.0 xHCI Controller.
USB Bus is Intel SunrisePoint-LP SMBus.

USB 3.0 External Hard Drive is WD My Passport - 1 TB - NTFS Formatted.

The same information also applies if the WD My Passport is connected to a USB 2.0 port.
The same information also applies to a USB 2.0 Flash Drive connected to a USB 2.0 Port.

However, Haiku Desktop does not "see"/"mount" the WD My Passport drive.

...

Welcome to the Haiku boot loader!
number of drives: 2
add_partitions_for(0x00105360, mountFS = no)
add_partitions_for(fd = 0, mountFS = no)
0x00105648 Partition::Partition
0x00105648 Partition::Scan()
boot partition offset : 0
0x00105648 Partition::_Mount check for file_system : TAR filesystem
PackageVolumeInfo::SetTo()
PackageVolumeinfo::SetTo() :failed to open package directory : No such file or directory
add_partitions_for(0x00105420, mountFS=yes)
add_partitions_for(fd=1, mountFS=yes)
0x00106d08 Partition::Partition
0x00106d08 Partition::Scan()
Check for partitioning_system: GUID Partition Map
Check for partitioning_system: Intel Partition Map priority : 810
Check for partitioning_system: Intel Extended Partition

...

Parent Partition 0x00106d08
Add child partitions:
Child 0x00106dc0 size = 1,074,790,400 (HP Tools) (Start 1,048,576)
Child 0x00106e98 size = 482,271,559,680 (Windows)
Child 0x00106f70 size = 14,607,712,256 (Recovery)
Child 0x00107048 size = 2,147,483,648 (System)

...

Each child partition is scanned for partitioning system then for file system (BFS then FAT32 then TAR).
(No TAR check for Child 0x00107108)

...

0x00106e80 Partition::~Partition
0x00106f58 Partition::~Partition
0x00107030 Partition::~Partition
0x00106d08 Partition::~Partition
0x00107108 Partition::SetParent 0x00000000

...

add_partitions_for(0x001054e0, mountFS = Yes)
add_partitions_for(fd = 2, mountFS = Yes)
0x00106f58 Partition::Partition
0x00106f58 Partition::Scan()
Check for partitioning_system: GUID Partition Map
Check for partitioning_system: Intel Partition Map
Check for partitioning_system: Intel Extended Partition

Parent partition 0x00106f58
Child 0x00107030
Check for partitioning system: GUID Partition Map
Check for partitioning system: Intel Partition Map
Check for partitioning system: Intel Extended Partition
0x00107030 Partition::~Partition
0x00106f58 Partition::~Partition

The above are the last entries from the boot loader.