Cylinder Allocation; Performance Characteristics - IBM DCAS-32160 - Ultrastar 2.1 GB Hard Drive Specifications

3.3 Cylinder Allocation

System Area
Data Zone 0
Data Zone 1
Data Zone 2
Data Zone 3
Data Zone 4
Data Zone 5
Data Zone 6
Data Zone 7
System Area
Mode page 03 (Format Device Parameters) and 0C (Zone Parameters) provide methods to determin medium
format and zone parameters. See 7.12.4, "Page 3 (Format Device Parameters)" on page 108, and 7.12.9,
"Page 0C (Notch Parameters)" on page 117.

3.4 Performance Characteristics

A drive performance is characterized by the following parameters:
Command Overhead
Mechanical Positioning
Seek Time
Latency
Data Transfer Speed
Buffering Operation (Lookahead/Write cache)
Note: All the above parameters contribute to drive performance. There are other parameters that contribute
to the performance of the actual system. This specification tries to define the bare drive characteristics, not
the system throughput which will depend on the system and the application.
10
O E M Spec. of DCAS-34330/32160
Phys. Cyl.
0-857
858-2684
2685-3362
3363-4287
4288-5379
5380-6242
6243-6920
6921-8209
Sectors/Trk
211
198
184
176
165
154
145
132