10 Savvio 10K.5 FC Product Manual, Rev. D
5.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Sav-
vio 10K.5 FC drives.
5.1 Internal drive characteristics
ST9900805FC ST9600205FC ST9450405FC ST9300605FC
Drive capacity* 900 600 450 300 GBs (formatted
, rounded off value)
Read/write data heads 6 4 3 2
Tracks per inch 300,000 300,000
300,000 300,000 TPI
Peak bits per inch 1686 1686 1686 1686 kBPI
Areal density 506 506 506 506 Gb/in2
Internal data rate 1.00 to 1.91 1.00 to 1.91
1.00 to 1.91 1.00 to 1.91 Gb/s (ID to OD)
disk rotation speed 10K 10K 10K 10K rpm
Avg rotational latency 3.0 3.0 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.
5.2 Seek performance
See Section 10.5, "FC-AL physical interface" on page 68 and the Fibre Channel Interface Manual (part number
77767496) for additional timing details.
5.2.1 Access time
Not including controller overhead
2
(ms)
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 3.7 4.1 3.4 3.8
Single track 0.2 0.4 0.2 0.4
Full stroke 7.7 8.1 7.1 7.4
2. Access to data = access time + latency time.
900GB models 600, 450 and 300GB models
Read Write Read Write
