IBM DJSA-210 Hard Drive Specifications - Page 29

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

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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 9. 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 DJSA-232 DJSA-230/220/210/205 Figure 10. Latency time 4.5.2.5 Drive ready time Rotational Speed (RPM) 5400 4200 Time/1 revolution (ms) 11.1 14.3 Average Latency (ms) 5.5 7.1 Condition Power On To Ready Power On To Ready Power On To Ready Model DJSA-232 DJSA-230 DJSA-220/210/205 Typical (sec) 5.0 3.3 3.0 Max. (sec) 9.5 9.5 9.5 Figure 11. 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 33GH/30GT/20GN hard disk drive specifications 15

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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 9. 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
DJSA-230/220/210/205
5.5
11.1
5400
DJSA-232
Average Latency
(ms)
Time/1 revolution
(ms)
Rotational Speed
(RPM)
Model
Figure 10. Latency time
4.5.2.5 Drive ready time
9.5
3.0
DJSA-220/210/205
Power On To Ready
9.5
3.3
DJSA-230
Power On To Ready
9.5
5.0
DJSA-232
Power On To Ready
Max. (sec)
Typical (sec)
Model
Condition
Figure 11. 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 33GH/30GT/20GN hard disk drive specifications
15