Seagate ST300MM0026 Savvio 10K.4 SAS Product Manual - Page 17
Performance characteristics
View all Seagate ST300MM0026 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 17 highlights
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 ST9600204SS ST9600104SS 600 6 677,557 100,021 147,620 240,000 1,430 343 1.62 10K 3.0 ST9450404SS ST9450304SS 450 6 677,557 75,016 110,715 180,000 1,430 257.4 1.62 10K 3.0 GB (formatted, rounded off value) Bytes (average, rounded off values) MB (unformatted, rounded off value) Tracks (user accessible) TPI (average) kBPI Gb/in2 Gb/s (variable with zone) rpm ms 4.2 Seek performance characteristics See Section 10.4.1, "SAS physical interface" on page 60 and the SAS Interface Manual (part number 100293071) for additional timing details. 4.2.1 Access time Average Single track Full stroke Average Single track Full stroke 600GB Typical3,4 450GB Typical3,4 Including controller overhead1,2 (ms) Read Write 4.0 4.6 0.50 0.76 8.01 8.38 4.0 4.6 0.50 0.76 7.96 8.51 Not including controller overhead1,2 (ms) Read Write 3.8 4.4 0.30 0.56 7.81 8.18 3.8 4.4 0.30 0.56 7.76 8.31 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. Savvio 10K.4 SAS Product Manual, Rev. C 9