Seagate DiamondMax 21 Manual download pdf (Page 18)

12 DiamondMax 21 PATA Product Manual, Rev. B

2.6 Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using

drive diagnostics. The specifications in the table below are defined as follows:

• Track-to-track seek time is an average of all possible single-track seeks in both directions.

• Average seek time is a true statistical random average of at least 5,000 measurements of seeks between

random tracks, less overhead.

*Measured in quiet mode

Note. These drives are designed to consistently meet the seek times represented in this manual. Physical seeks,

regardless of mode (such as track-to-track and average), are expected to meet or exceed the noted values.

However, due to the manner in which these drives are formatted, benchmark tests that include command

overhead or measure logical seeks may produce results that vary from these specifications.

2.7 Start/stop times

320 - 200GB models 160 - 80GB models

*Typical seek times (msec) Read Write Read Write

Track-to-track <0.8 <1.0 <1.0 <1.2

Average <11.0 <12.0 <11.0 <12.0

Average latency: 4.16

320GB model 300 - 200GB model 160 - 80GB model

Power-on to Ready (sec) 15 (max) 11 (max) 7.9 (max)

Standby to Ready (sec) 15 (max) 7.9 (max)

Ready to spindle stop (sec) 10 (max)

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 49 50

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Seagate DiamondMax 21 Manual Page 18