4.0Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of NL35 Series drives.

4.1Internal drive characteristics

 

ST3500071FC

ST3400071FC

 

Drive capacity*

500.0

400.0

Gbytes (formatted, rounded off value)

Read/write data heads

8

8

 

Bytes per track

686

552

Kbytes (average, rounded off values)

Bytes per surface

84.1

67.7

Mbytes (unformatted, rounded off value)

Tracks per surface (total)

122,712

122,712

Tracks (user accessible)

Tracks per inch

120,000

120,000

TPI

Peak bits per inch

747

597

KBPI

Internal data rate

411-794

322-669

Mbits/sec (variable with zone)

Disc rotation speed

7,200

7,200

rpm (+ 0.5%)

Avg rotational latency

4.17

4.17

msec

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on op- erating environment and formatting.

4.2Seek performance characteristics

4.2.1Access time [4]

Not including controller overhead (without disconnect) [1]

 

Drive level

 

 

Read

Write

 

msec

 

Average—Typical [2]

8.5

9.5

Single Track—Typical [2]

0.8

1.0

Full Stroke—Typical [2]

16

16.5

4.2.2Format command execution time (in minutes)

 

ST3500071FC

ST3400071FC

Maximum (with verify)

375

360

Maximum (without verify)

170

155

NL35 Series FC Product Manual, Rev. D

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Seagate ST3500071FC manual Performance characteristics, Internal drive characteristics, Seek performance characteristics