Seagate Cheetah 100516225, Руководство по эксплуатации продукта

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C
HEETAH
15K.7 FC P
RODUCT
M
ANUAL
, R
EV
. E 10
4.0 P
ERFORMANCE CHARACTERISTICS
This section provides detailed information concerning performance-related characteristics and features of Cheetah 15K.7 FC
drives.
4.1 I
NTERNAL 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/inch
2
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 S
EEK 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
N
OT 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.
R
EAD
W
RITE