Physical Organization; Recording And Interface Technology; Physical Characteristics; Seek Time - Seagate ST1500LM012 Product Manual

2.2

Physical organization

Drive model
2TB and 1.5TB models
1TB and 500GB models
2.3

Recording and Interface Technology

Interface
Recording method
Recording density
Track density
Areal density
Spindle speed
Data transfer rate (up to)
2.4

Physical Characteristics

Height (mm/in)
Width (mm/in)
Length (mm/in)
Typical weight (g/lb)
Cache buffer
2.5

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 5000 measurements of seeks between random tracks, less overhead.
Table 3 Typical seek times
Typical seek times (ms)
Track-to-track
Average
Average latency
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 the noted values. However, due
Note
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.
Seagate Mobile HDD Product Manual, Rev. A
Read/write heads
4
2
SATA 6Gb/s
Perpendicular
2276 Kb/in
580 ktracks/in avg
2
1320 Gb/in avg
5400 RPM
140 MB/s
7.0 (± 0.2) / 0.276 (± 008)
69.85 (± 0.25) / 2.750 (± 0.010)
100.35 (+0.20/-0.25) / 3.951 (+0.008/-0.010)
90 / 0.198 (2TB & 1.5TB)
85 / 0.187 (1TB & 500GB)
128MB
Read
1.5
13.0
5.6
Number of discs
2
1
Drive Specifications
12