Product manual

Cheetah 9LP FC Product Manual, Rev. C 9
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
ST39102FC
Drive capacity 11.27 ........................ Gbytes (unformatted)
9.105 ........................ Gbytes (formatted with 512-byte logical blocks)
Read/write data heads 12
Bytes per track 104,840 - 159,008 .... Bytes (average, unformatted)
Bytes per surface 939 ........................... Mbytes (unformatted)
Cylinders/tracks per surface 6,962 ........................ Tracks (user accessible)
Tracks per inch 8,962 ........................ TPI
Internal data rate 152-231 .................... Mbits/sec (variable with zone)
Disc rotation speed 10,025 ...................... rpm (+
0.5%)
Avg rotational latency 2.99 .......................... msec
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
4.2.2 Format command execution time for ≥ 512-byte sectors
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, 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.
5.4 6.2
Single track Typical
3,4
0.8 1.1
Full stroke Typical
3,4
<12.2 <13.2
ST39102FC
Maximum (with verify) 30 minutes
Maximum (without verify) 15 minutes