Seagate ST3400071FC, Product Manual

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NL35 Series FC Product Manual, Rev. D 11
4.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of
NL35 Series drives.
4.1 Internal 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.
4.2 Seek performance characteristics
4.2.1 Access time [4]
4.2.2 Format command execution time (in minutes)
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
ST3500071FC ST3400071FC
Maximum (with verify) 375 360
Maximum (without verify) 170 155