Seagate ST9600204FC ユーザーズマニュアル
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.
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.
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.
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