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Cheetah 36LP FC Product Manual, Rev. C
4.0
Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of
Cheetah 36LP FC 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
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.
Access to data = controller overhead + average seek time + latency time.
4.2.2
Format command execution time for
Maximum (with verify)
Maximum (without verify)
ST336704FC/FCV
ST318304FC/FCV
36.7 .......................... 18.35................................ Gbytes (formatted, rounded off value)
12 ............................. 6
215,248 .................... 215,248............................ Bytes (average, rounded off values)
3,035 ........................ 3,035................................ Mbytes (unformatted, rounded off value)
14,100 ...................... 14,100.............................. Tracks (user accessible)
18,145 ...................... 18,145.............................. TPI
334 ........................... 334................................... KBPI
280-427 .................... 280-427............................ Mbits/sec (variable with zone)
10,025 ...................... 10,025.............................. rpm (+ 0.5%)
2.99 .......................... 2.99.................................. msec
Including controller overhead
1
(without disconnect)
Read
Write
5.4
6.2
0.8
1.1
11.2
11.9
ST336704FC/FCV
ST318304FC/FCV
120 minutes
60
60 minutes
30
Not including controller overhead
2
,
(msec)
(without disconnect)
Read
5.2
0.6
11.0
512-byte sectors
9
1,2
(msec)
Write
6.0
0.9
11.7
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