Seagate ST940110A ユーザーズマニュアル

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Momentus 4200 N-Lite Product Manual, Rev. A
2.5
Recording and interface technology  
2.6
Physical characteristics  
2.7
Seek time
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.
*Measured in performance 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. 
Technology
Specification
Interface
Parallel ATA
Recording method
RLL 0,11
Recording density BPI (bits/inch max)
642,000
Track density TPI (tracks/inch max)
100,780
Areal density (Mbits/inch
2
 max)
65
Spindle speed (RPM) (± 0.2%)
4,200 class performance (spin speed actually 5,400 RPM)
Internal data-transfer rate OD (Mbytes/sec max)
48.25
Sustained data transfer rate OD (Mbytes/sec max)
31.0
I/O data-transfer rate (Mbytes/sec max)
100 (Ultra DMA mode 5)
Interleave
1:1
Cache buffer
2 Mbytes (2,048 kbytes)
Height
(mm)
 
(inches)
9.5 +/-0.2
 
0.374  +/-0.0078
Width
(mm)
 
(inches)
69.85 +/-0.25
 
2.75  +/-0.0098
Length
(mm)
 
(inches)
100.2 +/-0.25
 
3.945 +/-0.0098
Typical weight
(grams)
 
(pounds)
99
 
0.218
*Typical seek times (msec)
Read 
Write 
Track-to-track
1.5
2.0
Average
12.0
14.0
Full-stroke
22.0
26.0
Average latency
5.6
5.6