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
Bytes per track
Bytes per surface
Tracks per surface (total)
Tracks per inch
Peak bits per inch
Internal data rate
Disc rotation speed
Avg rotational latency
4.2
Seek performance characteristics
See Section 9.5, "FC-AL physical interface" on page 60 and the Fibre Channel Interface Manual (part number
77767496) 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, voltage, and horizontal orientation as
measured on a representative sample of drives.
4.
Access time = controller overhead + average seek time and applies to all data transfer commands.
Access to data = access time + latency time.
Savvio FC Product Manual, Rev. D
ST973401FC
ST936701FC
73.4
36.7
4
2
360,000
360,000
18,387
18,387
51,052
51,052
105
105
660
660
506-753
506-753
10,009
10,009
3.00
3.00
Including controller overhead
(msec)
Read
4.70
0.65
8.70
Gbytes (formatted, rounded off value)
Bytes (average, rounded off values)
Mbytes (unformatted, rounded off value)
Tracks (user accessible)
KTPI
KBPI
Mbits/sec (variable with zone)
revolutions/min (RPM)
msec
1
2
,
Not including controller overhead
(msec)
Write
Read
5.10
4.50
0.95
0.45
9.10
8.50
1,2
Write
4.90
0.75
8.90
11