Seagate ST300MP0074 Savvio 15K.1 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 Tracks per surface (total) Tracks per inch Peak bits per inch Areal density Internal data rate Disc rotation speed Avg rotational latency ST973451SS 73.4 4 42,554 150 861.81 130.58 957.51 to 1,282.08 15k 2 ST936751SS 36.7 2 42,554 150 861.81 130.58 957.51 to 1,282.08 15k 2 Gbytes (formatted, rounded off value) Tracks (user accessible including spare tracks) kTPI (average) kBPI Gbit/in2 Mbits/sec (variable with zone) rpm msec 4.2 Seek performance characteristics See Section 9.4.1, "SAS physical interface" on page 54 and the SAS Interface Manual (part number 100293071) for additional timing details. 4.2.1 Access time (Gen 2.0 LP data) Average Single track Full stroke Typical1,2 Typical1,2 Typical1,2 Not including controller overhead (msec) Read Write 2.9 3.3 0.2 0.4 5.1 5.5 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. Savvio 15K SAS Product Manual, Rev. C 11