Seagate ST973451FC Manuale Utente
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.
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.
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.
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