Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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Note: Values shown are nominal. Actual values will vary based on manufacturing optimization. Mode Page 03 (Format
Device Parameters), page 180 and Mode Page 0C (Notch Parameters), page 188 provide methods to determine actual
medium format and zone parameters for specific drives.
4.5 Performance characteristics
Drive performance is characterized by the following parameters:
•Command overhead
•Mechanical head positioning
- Seek time
- Latency
•Data transfer speed
•Buffering operation (read ahead/write cache)
Note: All the above parameters contribute to drive performance. There are other parameters that contribute to the perfor-
mance of the actual system. This specification tries to define the bare drive characteristics, not system throughput, which
depends on the system and the application.
Zone Sectors /Tracks Cylind er/Z one Start
Cylinder End
Cylinder
0 1188 5800 0 5799
1 1170 13300 5800 19099
2 1147 6400 19100 25499
3 1134 3000 25500 28499
4 1125 1200 28500 29699
5 1080 13800 29700 43499
6 1041 800 43500 44299
7 1035 1800 44300 46099
8 1026 1900 46100 47999
9 1012 2700 48000 50699
10 1002 600 50700 51299
11 990 3100 51300 54399
12 972 2200 54400 56599
13 945 4600 56600 61199
14 918 2600 61200 63799
15 900 3300 63800 67099
16 877 2500 67100 69599
17 864 200 69600 69799
User Cylinder A llo c ation 300 GB