Seagate ST3500312CS Pipeline HD Series SATA Product Manual - Page 15

Physical characteristics, Seek time, Start/stop times

Page 15 highlights

2.5 Physical characteristics Maximum height Maximum width Maximum length Typical weight Cache buffer 8 Mbytes (8,192 kbytes) 16 Mbytes (16,384 kbytes) 500GB models 26.1 mm (1.028 inches) 101.85 mm (4.010 inches) 146.99 mm (5.787 inches) 572 grams (1.261 lb.) 320GB models 160GB models 20.20 mm (0.794 inches) 415 grams (0.915 lb.) ST3500321CS, ST3320310CS and ST3160310CS ST3500422CS and ST3320410CS 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 random tracks, less overhead. Typical seek times (msec) Track-to-track Average Read

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46

Pipeline HD Series SATA Product Manual, Rev. C
9
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
random tracks, less overhead.
*Measured in performance mode.
**Measured in quiet 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 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.
2.7
Start/stop times
500GB models
320GB models
160GB models
Maximum height
26.1 mm (1.028 inches)
20.20 mm (0.794 inches)
Maximum width
101.85 mm (4.010 inches)
Maximum length
146.99 mm (5.787 inches)
Typical weight
572 grams (1.261 lb.)
415 grams (0.915 lb.)
Cache buffer
8 Mbytes (8,192 kbytes)
ST3500321CS, ST3320310CS and ST3160310CS
16 Mbytes (16,384 kbytes)
ST3500422CS and ST3320410CS
Typical seek times (msec)
Read
Write
Track-to-track
<1.0
<1.2
Average
<14.0
<15.0
500GB models
320 & 160GB models
Power-on to Ready (sec)
<12 (typ)
<6 (typ)
Standby to Ready (sec)
<12 (typ)
<6 (typ)
Ready to spindle stop (sec)
10 (max)