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Savvio 15K.1 FC Product Manual, Rev. B
11
4.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Sav-
vio drives.
4.1 Internal drive characteristics
ST973451FC ST936751FC
Drive capacity 73.4 36.2 Gbytes (formatted, rounded off value)
Read/write data heads 4 2
Tracks per surface (total) 42,554 42,554 Tracks (user accessible)
Tracks per inch 150 150 kTPI (average)
Peak bits per inch 861.81 861.81 kBPI
Areal Density 130.58 130.58 Gbit/in
2
Internal data rate 957.51 to 1,282.08 957.51 to 1,282.08 Mbits/sec (variable with zone)
Sustained data transer rate 57-89 57-89 Mbytes/sec (variable with zone)
Disc rotation speed 15k 15k revolutions/min (RPM)
Avg rotational latency 2.0 2.0 msec
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
Not Including controller overhead
1
,
2
(msec)
1. Execution time measured from receipt of the FCP Command to the FCP Response.
2. Assumes no errors and no sector has been relocated.
Read Write
Average Typical
3
,
4
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.
2.6 3.1
Single track Typical
3,4
0.2 0.4
Full stroke Typical
3,4
4.9 5.5