Seagate manual 4.0 P

CHEETAH 15K.7 FC PRODUCT MANUAL, REV. E 10
4.0 PERFORMANCE CHARACTERISTICS
This section provides detailed information concerning performance-related characteristics and features of Cheetah 15K.7 FC
drives.
4.1 INTERNAL DRIVE CHARACTERISTICS
ST3600057FC ST3450857FC ST3300657FC
ST3600957FC ST3450757FC ST3300557FC
ST3600857FC ST3450657FC ST3300457FC
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 1,361 1,361 1,361 KBPI
Areal Density 225 225 225 Gbits/inch2
Internal data rate 1.49 - 2.37 1.49 - 2.37 1.49 - 2.37 Gbits/sec (max)
disk rotation speed 15k 15k 15k RPM
Avg rotational latency 2.0 2.0 2.0 msec
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.
4.2 SEEK PERFORMANCE CHARACTERISTICS
See Section 11.5, "FC-AL physical interface" on page 56 and the Fibre Channel Interface Manual (part number 77767496)
for additional timing details.
4.2.1 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 3.4 3.9
Single track Typical 0.2 0.44
Full stroke Typical 6.6 7.4
2. Access to data = access time + latency time.
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