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4.0
Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Enterprise Capacity 3.5 HDD v4
drives.
4.1
Internal drive characteristics
Drive capacity
6TB models
Read/write data heads
12
Bytes/track
1,470,464
Bytes/surface
500,000
Tracks/surface (total)
337,400
Tracks/in
320,000
Peak bits/in
2,011,000
Areal density
643
Internal data rate
2317
Disk rotation speed
7200
Avg rotational latency
4.16
4.1.1
Format command execution time
5xxE-byte sectors (minutes)
Maximum (with verify)
Maximum (without verify)
4KN-byte sectors (minutes)
Maximum (with verify)
Maximum (without verify)
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
Maximum Internal data rate*
Sustained transfer rate
SAS Interface maximum instantaneous transfer rate
Logical block sizes
512 (default), 520, 524 or 528.
Read/write consecutive sectors on a track
Flaw reallocation performance impact (for flaws reallocated at format time using the
spare sectors per sparing zone reallocation scheme.)
Average rotational latency
*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
Seagate Enterprise Capacity 3.5 HDD v4 SAS Product Manual, Rev. B
4TB models
2TB models
8
4
6TB models
4TB models
1168.83
926.28
596.17
407.33
6TB models
4TB models
1185.62
791.38
597.35
411.48
(formatted, rounded off value)
Bytes (average, rounded off values)
MB (unformatted, rounded off values)
Tracks (user accessible)
TPI (average)
BPI
2
Gb/in
Mb/s (max)
RPM
ms
2TB models
384.17
193.55
2TB models
393.65
200.73
1 to 1
2.32 Gb/s
100 to 216 MiB/s **
1200MB/s* per port
(dual port = 2400MB/s*)
Yes
Negligible
4.16ms
14
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