Seagate BARRACUDA ST1500DL003 - Manual (Page 14)

14 Barracuda Green SATA Product Manual, Rev. D
Drive Specifications www.seagate.com
2.4 Recording and interface technology
2.5 Physical characteristics
2.6 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 5,000 measurements of seeks between ran-
dom tracks, less overhead.
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density (max) 1632kb/in
Track density (avg) 274 ktracks/in
Areal density (avg) 422Gb/in
2
Spindle speed (RPM) 5900
Internal data transfer rate (max) 1928Mb/s
Sustained data transfer rate (max) 144MB/s
I/O data-transfer rate (max) 600MB/s
Maximum height
2000GB and 1500GB models 26.1mm / 1.028 in
Maximum width 101.85mm / 4.0 in (± 0.010 in)
Maximum length 147.00mm / 5.78 in
Typical weight
2000GB and 1500GB models 635g / 1.39 lb
Cache buffer
2000 and 1500GB models 64MB
Typical seek times (ms) Read Write
Track-to-track 1.0 1.2
Average 12.0 13.0
Average latency 5.08 5.08
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.