4.4.2.4 Cylinder switch time (Cylinder skew)
1.7
DTLA-307XXX
2.0
DTLA-305XXX
Typical (ms)
Cylinder switch time
Figure 8. Cylinder Skew
A cylinder switch time is defined as the amount of time required by the fixed disk to access the next
sequential block after reading the last sector in the current cylinder.
The measuring method is given in 4.4.6, “Throughput” on page 0.
4.4.2.5 Single track seek time (without command overhead, including settling)
2.1
2.5
1.4
1.8
Write
1.6
2.0
0.9
1.3
Read
DTLA-307XXX
DTLA-305XXX
DTLA-307XXX
DTLA-305XXX
Max (ms)
Typical (ms)
Function
Figure 9. Single Track Seek Time
Single track seek is measured as the average of one (1) single track seek from every track with a random
head switch in both directions (inward and outward).
4.4.2.6 Average latency
4.17
8.3
DTLA-307XXX
5.56
11.1
DTLA-305XXX
Average latency
(ms)
Time for a revolution
(ms)
Average latency
Figure 10. Latency Time
4.4.3 Drive ready time
31
14
DTLA-307060/75
31
12
DTLA-307015/20/30/45
31
8
DTLA-305XXX
Maximum (sec)
Typical (sec)
Power on to ready
Figure 11. Drive ready time
Ready
The condition in which the drive is able to perform a media access command
(e.g. read,write) immediately.
Power on
This includes the time required for the internal self diagnostics.
Note: Max Power On to ready time is the maximum time period that Device 0 waits for Device 1 to assert
PDIAG–.
Deskstar 40GV & 75GXP hard disk drive specifications
14
Summary of Contents for DTLA-305040 - Deskstar 41.1 GB Hard Drive
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