Seagate BarraCuda Product Manual, Rev. D
10
Drive Specifications
2.2
Physical organization
2.3
Recording and Interface Technology
2.4
Physical Characteristics
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.
Drive model
Read/write heads
Number of discs
ST2000LM010 & ST2000LM015
4
2
ST1000LM038 & ST1000LM048
ST500LM030, ST500LM032 & ST500LM033
2
1
Interface
SATA 6Gb/s
Recording method
Perpendicular
Recording density
2276 Kb/in
Track density
580 ktracks/in avg
Areal density
1320 Gb/in
2
avg
Spindle speed
5400 RPM
Data transfer rate (up to)
140 MB/s
Height (mm/in)
7.0 (± 0.2) / 0.276 (± 008)
Width (mm/in)
69.85 (± 0.25) / 2.750 (± 0.010)
Length (mm/in)
100.35 (+0.20/-0.25) / 3.951 (+0.008/-0.010)
Typical weight (g/lb)
90 / 0.198 (ST2000LM010 & ST2000LM015)
85 / 0.187 (ST1000LM038, ST1000LM048,
ST500LM030, ST500LM032 & ST500LM033)
Cache buffer
128MB
Table 2
Typical seek times
Typical seek times (ms)
Read
Track-to-track
1.5
Average
13.0
Average latency
5.6
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 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 specifications.
