7
Magnetic Disk Units
Target Scope
Magnetic disk units, except the following:
1) Those with a memory capacity of 1 GB or less,
2) Those which only work based on directcurrent power supply through data communication cable of USB cables, etc.
Energy Consumption Efficiency
Energy consumption efficiency shall be a numeric value obtained by dividing power consumption (W) by memory capacity (GB).
Categories & Target Standard Values
1) FY2011 and each subsequent fiscal year (until FY2022)
In the target fiscal year and each subsequent fiscal year, for each category, the weighted average value obtained by weighting energy consumption efficiency with shipment volume shall not be above the target standard value which is a weighted average value obtained by weighting standard energy consumption efficiency*1 with shipment volume. ^{*1: }Values obtained from the standard energy consumption calculation formulas.
*1: Values obtained from the standard energy consumption calculation formulas. 
Category  Standard energy consumption calculation formula  

Type of magnetic disk unit  Shape and performance of magnetic disk unit  Revolution speed  Use  Category name  
Single unit disk  Disk size exceeding 75 mm; 1 disk  ―  ―  A  E＝exp(2.98×ln(Ｎ)－30.8) 
Disk size exceeding 75 mm; 2 or 3 disks  ―  ―  B  E＝exp(2.98×ln(Ｎ)－31.2)  
Disk size exceeding 75 mm; 4 disks or more  ―  ―  C  E＝exp(2.11×ln(Ｎ)－23.5)  
Disk size exceeding 50 mm but not over 75 mm; 1 disk  5,000 rpm or less  ―  D  E＝exp(2.98×ln(Ｎ)－29.8)  
Over 5,000 rpm but 6,000 rpm or less  ―  E  E＝exp(2.98×ln(Ｎ)－31.2)  
Over 6,000 rpm  ―  F  E＝exp(4.30×ln(Ｎ)－43.5)  
Disk size exceeding 50 mm but not over 75 mm; 2 or 3 disks  5,000 rpm or less  ―  G  E＝exp(2.98×ln(Ｎ)－31.5)  
Over 5,000 rpm but 6,000 rpm or less  ―  H  E＝exp(2.98×ln(Ｎ)－32.2)  
Over 6,000 rpm  ―  I  E＝exp(4.58×ln(Ｎ)－46.8)  
Disk size exceeding 50 mm but not over 75 mm; 4 disks or more  ―  ―  J  E＝exp(2.98×ln(Ｎ)－31.9)  
Disk size exceeding 40 mm but not over 50 mm; 1 disk  ―  ―  K  E＝exp(2.98×ln(Ｎ)－30.2)  
Disk size exceeding 40 mm but not over 50 mm; 2 disks or more  ―  ―  L  E＝exp(2.98×ln(Ｎ)－30.9)  
Subsystem  ―  ―  Ones for main frame server  M  E＝exp(1.85×ln(Ｎ)－18.8) 
―  ―  Ones whose category name is not M  N  E＝exp(1.56×ln(Ｎ)－17.7) 
Remarks: 

2) FY2023 and each subsequent fiscal year
In the target fiscal year and each subsequent fiscal year, for each category, the weighted average value obtained by weighting energy consumption efficiency with shipment volume shall not be above the target standard value which is a weighted average value obtained by weighting standard energy consumption efficiency with shipment volume.
Number of mountable disk drives  External dimensions of disk drives  Number of disks  Category names  Standard energy consumption calculation formulae 

1    1  I  E＝exp(2.98×ln(N)30.8) 
2 or 3  II  E＝exp(2.98×ln(N)31.2)  
4 or more  III  E＝exp(2.11×ln(N)23.5)  
2 to 11      IV  E＝exp(1.56×ln(N)17.7) 
12 or more  Having structures containing 3.5inch disk drives (with a width of over 75mm)    V  0.00170 
Having structures consisting of 2.5inch disk drives alone (with a width of 75mm or less)    VI  E＝exp(0.952×ln(N)14.2) 
Remarks: 

Target Fiscal Year
FY2011 and each subsequent fiscal year (until FY2022)
FY2023 and each subsequent fiscal year
Energy Efficiency Improvement
Energy consumption efficiency of category V is expected to be improved by about 68% compared with the FY2015 level in the target fiscal year (FY2023).
Display Items
●Product name and type
●Category name
●Energy consumption efficiency
●Memory capacity at maximum structure, number of revolutions of disks, numbers of disk drives each external dimensions of disk drive.
(limited to cases of category Ⅴ or category Ⅵ)
●Name of manufacturer, etc.
●Description of energy consumption efficiency
Display Location
Display items shall be presented at locations where they can be readily noticed in catalogs showing performance indications and in documents provided by the manufacturer for product selection.
Requirement for Recommendations and Orders
Manufacturers or importers whose annual manufacturing volume or importing volume (limited to shipment to the domestic market) is 5,000 units or more may be subject to recommendations and orders.