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SV35 Series SATA Product Manual, Rev. D
9
2.5
Physical characteristics 
2TB model
1TB models
500GB models
250GB model
Maximum height
26.1mm (1.028 in)
26.1mm (1.028 in)
19.98mm (0.787 in)
20.20 mm (0.794 in)
Maximum width
101.6mm (4.0 in)
101.85mm (4.010 in)
101.85mm (4.010 in)
101.85mm (4.010 in)
Maximum length
147.00mm (5.78 in)
146.99mm (5.787 in)
146.99mm (5.787 in)
146.99mm (5.787 in)
Typical weight
635g (1.39 lb)
677g (1.493 lb)
544 grams (1.199 lb)
380 grams (0.838 lb)
Cache buffer
64MB 
32MB 
16MB 
16MB
 
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. 
2TB model
1TB and 500GB model
250GB models
Typical seek times (msec)*
Read 
Write 
Read 
Write 
Read 
Write 
Track-to-track
<0.5
<1.5
<0.5
<1.5
<1.0
<1.2
Average
<8.5
<9.5
<8.5
<9.5
<8.5
<9.0
*Measured in Seek 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 val-
ues. 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
2TB model
1TB and 500GB models
250GB models
Power-on to Ready (max) 
<17s
<10s
<8s 
Ready to spindle stop (max)
10s
12s 
12s
Note.
Start/stop measurements are taken with nominal power at 25°C ambient temperature.