Product manual

10 Cheetah NS 10K.2 FC Product Manual, Rev. D
5.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of
Cheetah NS 10K.2 FC drives.
5.1 Internal drive characteristics
ST3600002FC ST3450802FC ST3300602FC
Drive capacity* 600 450 300 Gbytes (formatted, rounded off value)
Read/write data heads 8 6 4
Tracks per inch 165,000 165,000 165,000 TPI
Peak bits per inch 1,347 1,347 1,347 kBPI
Areal density 225 225 225 Gbits/inch
2
Internal data rate 1.01 to 1.84 1.01 to 1.84 1.01 to 1.84 Gbits/sec (variable with zone)
disk rotation speed 10k 10k 10k rpm
Avg rotational latency 2.98 2.98 2.98 msec
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
5.2 Seek performance
See Section 10.5, "FC-AL physical interface" on page 59 and the Fibre Channel Interface Manual (part number
77767496) for additional timing details.
5.2.1 Access time
Not including controller overhead
2
(msec)
1
1. Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as
measured on a representative sample of drives.
,
Average Typical 3.8 4.4
Single track Typical 0.22 0.22
Full stroke Typical 8.1 8.7
2. Access to data = access time + latency time.
Read Write