IBM IC35L036UWDY10 Hard Drive Specifications - Page 59
acoustics, Ns = 0.4 / Tt + Tl
![]() |
UPC - 000004119524
View all IBM IC35L036UWDY10 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 59 highlights
7.9 Acoustics The upper limit criteria of the A-weighted sound power levels are given in Bel relative to one pico watt and are shown in the following table. The measurement method is in accordance with ISO7779. Drives are to meet this criteria in both board up and board down orientations. Model Mode 146 GB all other models Idle Operating Idle Operating A-weighted sound power level (Bel) Typical Maximum 3.7 4.1 4.5 4.8 3.4 3.8 4.5 4.8 Figure 46. A-weighted sound power levels Background power levels of the acoustic test chamber for each octave band are to be recorded. Sound power levels are measured with the drive supported by spacers so that the lower surface of the drive is located 25 ± 3mm height from the chamber desk. No sound absorbing material shall be used. The acoustical characteristics of the drive subsystem are measured under the following conditions. Idle mode: Powered on, disks spinning, track following, unit ready to receive and respond to control line commands except approximately once per minute when the idle time function sweeps the disk surface. Operating mode: Continuous random cylinder selection and seek operation of the actuator with a dwell time at each cylinder. Seek rate for the drive is calculated per the formula below: Ns = 0.4 / (Tt + Tl) Ns = average seek rate in seeks/sec. Tt = published random seek time. Tl = time for the drive to rotate by half a revolution. Ultrastar 146Z10 hard disk drive specifications 43
![](/manual_guide/products/ibm-ic35l036uwdy10-hard-drive-specifications-4359dfe/59.png)