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4.0
Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Sav-
vio drives.
4.1
Internal drive characteristics
Drive capacity
Read/write data heads
Tracks per surface (total)
Tracks per inch
Peak bits per inch
Areal Density
Internal data rate
Sustained data transer rate
Disc rotation speed
Avg rotational latency
4.2
Seek performance characteristics
See Section 9.5, "FC-AL physical interface" on page 57 and the Fibre Channel Interface Manual (part number
100293070) for additional timing details.
4.2.1
Access time
3
4
,
Average
Typical
3,4
Single track
Typical
3,4
Full stroke
Typical
1.
Execution time measured from receipt of the FCP Command to the FCP Response.
2.
Assumes no errors and no sector has been relocated.
3.
Typical access times are measured under nominal conditions of temperature, volt-
age, and horizontal orientation as measured on a representative sample of drives.
4.
Access to data = access time + latency time.
Savvio 15K.1 FC Product Manual, Rev. B
ST973451FC
ST936751FC
73.4
36.2
4
2
42,554
42,554
150
150
861.81
861.81
130.58
130.58
957.51 to 1,282.08
957.51 to 1,282.08
57-89
57-89
15k
15k
2.0
2.0
Not Including controller overhead
Read
2.6
0.2
4.9
Gbytes (formatted, rounded off value)
Tracks (user accessible)
kTPI (average)
kBPI
2
Gbit/in
Mbits/sec (variable with zone)
Mbytes/sec (variable with zone)
revolutions/min (RPM)
msec
1
2
,
(msec)
Write
3.1
0.4
5.5
11
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