6 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
