Seagate ST3300657SS Cheetah 15K.7 FC Product Manual - Page 15
Performance characteristics - sector size
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4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Cheetah 15K.7 FC drives. 4.1 Internal drive characteristics Drive capacity Read/write data heads Tracks per inch Peak bits per inch Areal Density Internal data rate disk rotation speed Avg rotational latency ST3600057FC ST3600957FC 600 8 165,000 1,361 225 1.49 - 2.37 15k 2.0 ST3450857FC ST3450757FC 450 6 165,000 1,361 225 1.49 - 2.37 15k 2.0 ST3300657FC ST3300557FC 300 4 165,000 1,361 225 1.49 - 2.37 15k 2.0 Gbytes (formatted, rounded off value)* TPI KBPI Gbits/inch2 Gbits/sec (max) RPM msec *One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. 4.2 Seek performance characteristics See Section 10.5, "FC-AL physical interface" on page 63 and the Fibre Channel Interface Manual (part number 77767496) for additional timing details. 4.2.1 Access time Average Single track Full stroke Typical Typical Typical Not including controller overhead1,2(msec) Read Write 3.4 3.9 0.2 0.44 6.6 7.4 1. Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives. 2. Access to data = access time + latency time. 4.2.2 Format command execution time (minutes) When changing sector sizes, the format times shown below may need to be increased by 30 minutes. Maximum (with verify) Maximum (without verify) ST3600057FC 119 60 ST3450857FC 88 44 ST3300657FC 58 29 Note. There is approximately a 1.5 increase in time to format a SED drive versus a non-SED drive of the same capacity. Cheetah 15K.7 FC Product Manual, Rev. B 9