Dell R210 II Technical Manual page 26

Idle: Reference ISO7779 (1999) definition 3.1.7; system is running in its OS but no other specific
activity.
Active Hard Drives: An operating mode per ISO7779 (1999) definition 3.1.6; Section C.9 of ECMA-74
9th ed. (2005) is followed in exercising the hard disk drives.
Stressed Processor: An operating mode per ISO7779 (1999) definition 3.1.6; SPECPower set to 50%
loading is used.
LwA–UL: The upper limit sound power level (LwA) calculated per section 4.4.2 of ISO 9296 (1988) and
measured in accordance to ISO 7779 (1999).
LpA-Op: A-Weighted sound pressure level. The system is placed in center of ISO7779 table, while the
acoustic transducer is located 150 cm above the floor and 50 cm in front of the equipment.
Prominent tones: Criteria of D.6 and D.11 of ECMA-74 11th ed. (2010) are followed to determine if
discrete tones are prominent. The system is placed in a rack with its bottom at 75-cm from the floor.
The acoustic transducer is at front bystander position, ref ISO7779 3rd (2010), Section 8.6.2.
Dell PowerEdge R210 II Technical Guide 26