Seek Time; Start/Stop Times - Seagate ST34323A Product Manual

ST34323A Family Product Manual, Rev. C
Maximum length (mm)
(inches)
Typical weight (grams)
(pounds)

1.5 Seek time

All seek times are measured using a 486 AT computer (or faster) with
an 8.3 MHz I/O bus. The measurements are taken with nominal power
at 25°C ambient temperature. All times are measured using drive diag-
nostics. 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.
•
Full-stroke seek time is one-half the time needed to seek from the first
data cylinder to the maximum data cylinder and back to the first data
cylinder. The full-stroke typical value is determined by averaging 100
full-stroke seeks in both directions.
Seek times
Track-to-track
Average
Full-stroke
Average latency: 6.7 msec
Note. These drives are designed to consistently meet the seek times rep-
resented 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 format-
ted, benchmark tests that include command overhead or measure
logical seeks may produce results that vary from these specifications.

1.6 Start/stop times

Power-on to Ready (sec)
Standby to Ready (sec)
Ready to spindle stop (sec)
147.0
5.78
540
1.2
Read (msec, typ.) Write (msec, typ.)
1.5 3.0
11.0 13.0
18.0 21.0
— —
10 (typical)
5 (typical)
12 (typical)
7