Seagate 15K.3 ST373453FC Model Product Manual PDF - Page 19
Performance characteristics
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Cheetah 15K.3 FC Product Manual, Rev. D 9 4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Cheetah 15K.3 FC drives. 4.1 Internal drive characteristics Drive capacity Read/write data heads Bytes per track Bytes per surface Tracks per surface (total) Tracks per inch Peak bits per inch Internal data rate Disc rotation speed Avg rotational latency ST373453FC 73.4 8 377,770 12,046 31,310 64,000 542 609-891 15k 2.0 ST336753FC 36.7 4 377,770 12,046 31,310 64,000 542 609-891 15k 2.0 ST336753FC 18.4 2 377,770 12,046 31,310 64,000 542 609-891 15k 2.0 Gbytes (formatted, rounded off value) Bytes (average, rounded off values) Mbytes (unformatted, rounded off value) Tracks (user accessible) TPI KBPI Mbits/sec (variable with zone) rpm msec 4.2 Seek performance characteristics See Section 9.5, "FC-AL physical interface" on page 55 and the Fibre Channel Interface Manual (part number 77767496) for additional timing details. 4.2.1 Access time Including controller overhead1, 2 (msec) Not including controller overhead1,2 (msec) Average Single track Full stroke Typical3,4 Typical3,4 Typical3,4 Read 3.8 0.40 6.7 Write 4.1 0.60 7.1 Read 3.6 0.20 6.5 Write 3.9 0.40 6.9 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 and applies to all data transfer commands. Access to data = access time + latency time. 4.2.2 Format command execution time for ≥ 512-byte sectors (minutes) Maximum (with verify) Maximum (without verify) ST373453FC 90 45 ST336753FC 60 30 ST318453FC 30 15