Seagate ST9450405FC Savvio 10K.2 SAS Product Manual - Page 17
Performance characteristics
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4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Savvio 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 Areal density Internal data rate Disc rotation speed Avg rotational latency ST9146802SS ST973402SS 146.8 73.4 4 2 489,984 489,984 36,704 36,704 75,373 75,373 150,000 150,000 925,000 925,000 135 135 660-1054 660-1054 10k 10k 3.0 3.0 Gbytes (formatted, rounded off value) Bytes (average, rounded off values) Mbytes (unformatted, rounded off value) Tracks (user accessible) TPI (average) BPI Gbit/in2 Mbits/sec (variable with zone) rpm msec 4.2 Seek performance characteristics See Section 9.4.1, "SAS physical interface" on page 56 and the SAS Interface Manual (part number 100293071) for additional timing details. 4.2.1 Access time Average Single track Full stroke Typical3,4 Typical3,4 Typical3,4 Including controller overhead1, 2 (msec) Read Write 4.0 4.6 0.4 0.6 8.17 8.76 Not including controller overhead1,2 (msec) Read Write 3.8 4.4 0.2 0.4 7.97 8.56 1. Execution time measured from receipt of the Command to the 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. Data sheet data except full stroke which was Gen 2.0 data. Savvio 10K.2 SAS Product Manual, Rev. D 11