Seagate ST4000NM0033 Constellation ES.2 SAS Product Manual - Page 18
Performance characteristics
View all Seagate ST4000NM0033 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 18 highlights
5.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Constellation ES.2 drives. 5.1 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 disk rotation speed Avg rotational latency ST33000650SS ST33000651SS ST33000652SS 3 10 1,419,776 300,000 284,399 270,000 1,638,000 444 68.7 - 155 7200 4.16 TB (formatted, rounded off value) Bytes (average, rounded off values) MB (unformatted, rounded off value) Tracks (user accessible) TPI (average) BPI Gb/in2 MB/s (variable with zone) rpm ms 5.2 Seek performance characteristics See Section 12.4.1, "SAS physical interface" on page 55 and the SAS Interface Manual (part number 100293071) for additional timing details. 5.2.1 Access time Average Single track Full stroke Typical3,4 Typical3,4 Typical3,4 Not including controller overhead1, 2 (ms) Read Write 8.3 9.3 0.5 0.5 15.5 16.2 Including controller overhead1, 2 (ms) Read Write 8.5 9.5 0.7 0.7 15.7 16.4 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. 10 Constellation ES.2 SAS Product Manual, Rev. C