Seagate ST318203FC, Руководство по эксплуатации продукта

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Cheetah 18LP FC Product Manual, Rev. D 9
4.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of
Cheetah 18LP FC drives.
4.1 Internal drive characteristics
ST318203FC ST39103FC
Drive capacity 18.2 .......................... 9.10........... ........................ Gbytes (formatted, rounded off value)
Read/write data heads 12 ............................. 6
Bytes per track 153,284 - 229,045 .... 153,284 - 229,045............. Bytes (average, rounded off values)
Bytes per surface 1,913 ........................ 1,913......... ........................ Mbytes (unformatted, rounded off value)
Tracks per surface (total) 9,801 ........................ 9,801......... ........................ Tracks (user accessible)
Tracks per inch 12,580 ...................... 12,580....... ........................ TPI
Peak bits per inch 252 ........................... 252............ ........................ KBPI
Internal data rate 193-300 .................... 193-300..... ........................ Mbits/sec (variable with zone)
Disc rotation speed 10,016 ...................... 10,016....... ........................ rpm (+ 0.5%)
Avg rotational latency 2.99 .......................... 2.99........... ........................ msec
4.2 Seek performance characteristics
See Section 9.5, "FC-AL physical interface" on page 51 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
(without disconnect)
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.
Not including controller overhead
(without disconnect)
1,2
(msec)
Read Write 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 ov average seek time.
Access to data = controller ov average seek time + latency time.
5.4 6.0 5.2 5.8
Single track Typical
3,4
0.7 0.9 0.5 0.7
Full stroke Typical
3,4
12.2 13.2 12.0 13.0
ST318203FC ST39103FC
Maximum (with verify) 60 minutes 60 minutes
Maximum (without verify) 30 minutes 30 minutes