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Savvio 10K.4 FC Product Manual, Rev. A 9
4.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Sav-
vio 10K.4 FC drives.
4.1 Internal drive characteristics
ST9600204FC ST9450404FC
Drive capacity* 600 450 GBs (formatted, rounded off value)
Read/write data heads 6 6
Tracks per inch 240,000 180,000 TPI
Peak bits per inch 1,430 1,430 kBPI
Areal density 343 257.4 Gb/in2
Internal data rate 1.62 1.62 Gb/s (variable with zone)
disk rotation speed 10K 10K rpm
Avg rotational latency 3.0 3.0 ms
*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
4.2 Seek performance
See Section 9.5, "FC-AL physical interface" on page 58 and the Fibre Channel Interface Manual (part number
77767496) for additional timing details.
4.2.1 Access time
Not including controller overhead
1
,
2
(ms)
1. Typical access times are measured under nominal conditions of temperature,
voltage, and horizontal orientation as measured on a representative sample of
drives.
2. Access to data = access time + latency time.
Read Write
Average
600GB
Typical
3.80 4.40
Single track 0.30 0.55
Full stroke 3.88 4.56
Average
450GB
Typical
4.00 4.65
Single track 0.32 0.58
Full stroke 4.10 4.61