Seagate ST980829A ユーザーズマニュアル

8

Momentus 4200.2 Product Manual, Rev. C

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

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 speci-
fications.

Interface

Parallel ATA

Recording method

RLL 0,11

Recording density BPI (bits/inch typical)

778k

Track density TPI (tracks/inch typical)

126k

Areal density (Mbits/inch

2

 max)

98.2

Spindle speed (RPM) (± 0.2%)

4,200 RPM-class performance (actual spin speed: 5,400 RPM)

Internal data-transfer rate OD (Mbytes/sec max)

37

I/O data-transfer rate (Mbytes/sec max)

100 (Ultra DMA mode 5)

Interleave

1:1

Cache buffer

8 Mbytes (8,184 kbytes)

Height

(mm)

 

(inches)

9.5 +/-0.2

 

0.374 +/-0.008

Width

(mm)

 

(inches)

69.85 +/-0.25

 

2.750 +/-0.010

Length

(mm)

 

(inches)

100.2 +/-0.25

 

3.945 +/-0.010

Typical weight

(grams)

 

(pounds)

100

 

0.22

Track-to-track

1.5

2.0

Average

12.5

14.5

Full-stroke

22.0

24.0

Average latency

5.56

5.56