IBM IC25N020ATDA04 Hard Drive Specifications - Page 32

Single track seek time without command overhead, including settling, 5.2.4 Average latency

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4.5.2.3 Single track seek time (without command overhead, including settling) Command Type Read Write Typical (ms) 2.5 3.0 Maximum (ms) 4.0 4.5 Figure 14. Single track seek time Single track seek is measured as the average of one (1) single track seek from every track in both directions (inward and outward). 4.5.2.4 Average latency Model 48 GB model All other models Rotational Speed (RPM) 5400 4200 Time/1 revolution (ms) 11.1 14.3 Figure 15. Latency time 4.5.2.5 Drive ready time Average Latency (ms) 5.5 7.1 Condition Power On To Ready Power On To Ready Model 48 GB model All other models Typical (sec) 5.0 3.0 Max. (sec) 9.5 9.5 Figure 16. Drive ready time Ready The condition in which the drive is able to perform a media access command (for example-read, write) immediately. Power On To Ready This includes the time required for the internal self diagnostics. Travelstar 48GH, 30GN & 15GN hard disk drive specifications 18

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4.5.2.3 Single track seek time (without command overhead, including settling)
4.5
3.0
Write
4.0
2.5
Read
Maximum (ms)
Typical (ms)
Command
Type
Figure 14. Single track seek time
Single track seek is measured as the average of one (1) single track seek from every track in both
directions (inward and outward).
4.5.2.4 Average latency
7.1
14.3
4200
All other models
5.5
11.1
5400
48 GB model
Average
Latency
(ms)
Time/1 revolution
(ms)
Rotational Speed
(RPM)
Model
Figure 15. Latency time
4.5.2.5 Drive ready time
9.5
3.0
All other models
Power On To Ready
9.5
5.0
48 GB model
Power On To Ready
Max. (sec)
Typical (sec)
Model
Condition
Figure 16. Drive ready time
This includes the time required for the internal self diagnostics.
Power On To Ready
The condition in which the drive is able to perform a media access command
(for example—read, write) immediately.
Ready
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
18