User Manual

Seagate Exos 7E2000 v3 SAS Product Manual, Rev. B 16
3.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Exos 7E2000 v3 drives.
3.1 Internal drive characteristics
ST2000NX0263 ST2000NX0433 ST1000NX0323 ST1000NX0453
ST2000NX0273 ST1000NX0333
ST2000NX0323 ST1000NX0363
ST2000NX0333 ST1000NX0373
ST2000NX0343
ST2000NX0353
5xxE/4KN 5xxN 5xxE/4KN 5xxN
Drive capacity 2000 2000 1000 1000 GB (formatted, rounded off value)
Read/write data heads 10 10 5 5
Bytes per track 979 979 979 979 KBytes (avg, rounded off values)
Bytes per surface 200,000 200,000 200,000 200,000 MB (unformatted, rounded off value)
Tracks per surface (total) 197 197 197 197 Ktracks (user accessible, rounded off values)
(4096N, 512E or 512N)
Tracks per inch 315 335 315 335 KTPI (average) (4096N, 512E or 512N)
Peak bits per inch 1889 1998 1889 1998 KBPI
Areal density 585 640 585 640 Gb/in2 (4096N, 512E or 512N)
Disk rotation speed 7.2K 7.2K 7.2K 7.2K rpm
Avg rotational latency 4.167 4.167 4.167 4.167 ms
3.2 Performance characteristics
3.2.1 Format command execution time for 512-byte sectors (minutes)
Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the
Initiator (excluding connect/disconnect).
When changing sector sizes, the format times shown above may need to be increased by 30 minutes.
3.2.2 General performance characteristics
2TB models 1TB models
Maximum (with certify)
652 326
Maximum (without certify)
326 163
Sustained transfer rate 130 MiB/s **
136MB/s
SAS Interface maximum instantaneous transfer rate 1200 MB/s* per port
(dual port = 2400 MB/s*)
Logical block sizes
512E & 512N - 512 (default), 520,524, or 528
4096N - 4096 (default), 4160, 4192, or 4224
Read/write consecutive sectors on a track Yes
Flaw reallocation performance impact (for flaws reallocated at format time using the spare
sectors per sparing zone reallocation scheme.)
Negligible
Average rotational latency 4.167ms
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.
** MiB/s x 1.048 = MB/s