Deskstar 7K160 Hard Disk Drive Specification
61
7.7 Acoustics
The upper limit criteria of the octave sound power levels are given in Bels relative to one picowatt and
are shown in the following table. The sound power emission levels are measured in accordance with
ISO7779.
1
Applies to part numbers beginning with 0Y3.
Mode definitions
• I
dle mode:
The drive is powered on, disks spinning, track following, unit is ready to receive and
respond to control line commands.
•
Operating mode:
Continuous random cylinder selection and seek operation of the actuator with a
dwell time at each cylinder. The seek rate for the drive is calculated with the following formula:
• Dwell time = 0.5 x 60/RPM
• Seek rate = 0.4 / (average seek time + dwell time)
7.8 Identification labels
The following labels are affixed to every drive:
• A label containing the Hitachi logo, the Hitachi Global Storage Technologies part number and the
statement " Made by Hitachi Global Storage Technologies Inc." or Hitachi Global Storage Technol-
ogies approved equivalent.
• A label containing the drive model number, the manufacturing date code, the formatted capacity,
the place of manufacture, UL/CSA/TUV/CE/C-Tick mark logos
• A bar code label containing the drive serial number
• A label containing jumper pin description
• A user designed label per agreement
The above labels may be integrated with other labels
Table 48: Sound power levels
Mode
Typical/Max
Typical/Max
1
Idle
2.5 / 2.8
2.8 / 3.1
Operating
Performance seek mode
3.1 / 3.4
3.2 / 3.5
Quiet seek mode
2.6 / 2.9
2.9 / 3.2
Summary of Contents for Deskstar 7K160
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Page 297: ...Write Buffer 249 Write cache function 93 Write Continuous bit 102 Write DRQ interval time 30 ...