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CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. B 9
4.0 PERFORMANCE CHARACTERISTICS
This section provides detailed information concerning performance-related characteristics and features of Constellation ES.3 drives.
4.1 INTERNAL DRIVE CHARACTERISTICS
ST4000NM0023 ST3000NM0023 ST2000NM0023 ST1000NM0023
ST4000NM0043 ST3000NM0043 ST2000NM0043 ST1000NM0043
ST4000NM0113 ST3000NM0113 ST2000NM0113 ST1000NM0113
ST4000NM0063 ST3000NM0063 ST2000NM0063 ST1000NM0063
Drive capacity 4TB 3TB 2TB 1TB (fomatted, rounded off value)
Read/write data heads 10 8 5 3
Bytes/track 1,668,096 Bytes (average, rounded off values)
Bytes/surface 400,000 MB (unfomatted, rounded off values)
Tracks/surface (total) 320,800 Tracks (user accessible)
Tracks/in 305,000 TPI (average)
Peak bits/in 1,904,000 BPI
Areal density 578 Gb/in2
Internal data rate 2210 Mb/s (max)
Disk rotation speed 7200 RPM
Avg rotational latency 4.16 ms
4.1.1 Format command execution time for 512-byte sectors (minutes)
4TB models 3TB models 2TB models 1TB models
Maximum (with verify)
917 693 456 263
Maximum (without verify)
455 347 228 132
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.
4.1.2 General performance characteristics
Minimum sector interleave 1 to 1
Maximum Internal data rate* 2.21 Gb/s
Sustained transfer rate 83 to 175 MB/s **
SAS Interface maximum instantaneous transfer rate 600MB/s* per port
(dual port = 1200MB/s*)
Logical block sizes
512 (default), 520 or 528.
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 4.16ms
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or
from the host.