Product manual

Cheetah 4LP FC Product Manual, Rev. A 9
4.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of
Cheetah 4LP FC drives.
4.1 Internal drive characteristics
ST34501FC
Drive capacity 5.59 ..................Gbytes (unformatted)
4.52 ..................Gbytes (formatted with 512-byte logical blocks)
Read/write data heads 8
Bytes per track 115,078.............Bytes (average, unformatted)
Bytes per surface 751.0 ................Mbytes (unformatted)
Cylinders/tracks per surface 6,526 ................Tracks (user accessible)
Tracks per inch 6,932 ................TPI
Peak bits per inch 135,401 ............BPI
Internal data rate 122-177 ............Mbits/sec (variable with zone)
Disc rotation speed 10,033 ± 0.5% ..rpm
Avg rotational latency 2.99 ..................msec
4.2 Seek performance characteristics
Refer to paragraph 9.5, “FC-AL physical interface” and to the
Fibre Channel Interface Manual (part number
77767496) for additional timing details.
4.2.1 Seek time
4.2.2 Format command execution time for ≥ 512-byte sectors
1. Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a
Status Byte Transfer to the Initiator (excluding connect/disconnect).
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.
Including drive
controller overhead
(without disconnect)
1
,
2
(msec)
Drive level
Read Write
Average Typical
3
7.7 8.7
Single track Typical
3
0.98 1.24
Full stroke Typical
3
18.2 19.2
ST34501FC
Maximum (with verify) 60 minutes
Maximum (without verify) 36 minutes