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Cheetah 9LP FC Product Manual, Rev. C
4.0
Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of
Cheetah 9LP FC drives.
4.1
Internal drive characteristics
Drive capacity
Read/write data heads
Bytes per track
Bytes per surface
Cylinders/tracks per surface
Tracks 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 46 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.
Access to data = controller overhead + average seek time + latency time.
4.2.2
Format command execution time for
Maximum (with verify)
Maximum (without verify)
ST39102FC
11.27 ........................ Gbytes (unformatted)
9.105 ........................ Gbytes (formatted with 512-byte logical blocks)
12
104,840 - 159,008 .... Bytes (average, unformatted)
939 ........................... Mbytes (unformatted)
6,962 ........................ Tracks (user accessible)
8,962 ........................ TPI
152-231 .................... Mbits/sec (variable with zone)
10,025 ...................... rpm (+ 0.5%)
2.99 .......................... msec
Including controller
1
2
,
overhead
(msec)
Read
Write
5.4
6.2
0.8
1.1
<12.2
<13.2
ST39102FC
30 minutes
15 minutes
512-byte sectors
9
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