Converting DB and RDEV numbers to the HDD location number

The following describes the bit alignment of DB and RDEV numbers (which are expressed by 13 bits of a SIM reference code) and the relationship between the DB and RDEV numbers and the HDD location.

• Format of the DB and RDEV numbers

  W (4 bits)				X (4 bits)				Y (4 bits)				Z (4 bits)
  w	w	w	w	x	x	x	x	y	y	y	y	z	z	z	z
  			DB number (8 bits)								RDEV number (5 bits)

  Example:

  When SIM code = eb75a5 (Correction access occurred [eb7xxx]):

  WXYZ = 75a5 (hexadecimal)

  7				5				a				5
  0	1	1	1	0	1	0	1	1	0	1	0	0	1	0	1
  			DB number = AD (hexadecimal) 173 (decimal)								RDEV number = 05 (hex) 5 (decimal)

• Relationship between the DB and RDEV numbers and the HDD location number

  

  Example:

  When WXYZ = 75a5 (hexadecimal):

  HDD location number: HDD173-05

The following table describes the relationship between the DB and RDEV numbers (13 bits of a reference code), drive box number, RDEV number, and HDD location number, taking the example of drive boxes DB-000, DB-001, DB-190, and DB-191.