User Manual

Seagate Enterprise Capacity 3.5 HDD v5 SAS Product Manual, Rev. F 16
4.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Enterprise Capacity 3.5 HDD v5 drives.
4.1 Internal drive characteristics
Drive capacity 6TB models 4TB models 2TB models (formatted, rounded off value)
Read/write data heads 10 7 4
Bytes/track 1,470,464 Bytes (average, rounded off values)
Bytes/surface 500,000 MB (unformatted, rounded off values)
Tracks/surface (total) 337,400 Tracks (user accessible)
Tracks/in 369,000 TPI (average)
Peak bits/in 2,018,000 BPI
Areal density 733 Gb/in
2
Internal data rate 2432 Mb/s (max)
Disk rotation speed 7200 RPM
Avg rotational latency 4.16 ms
4.1.1 Format command execution time
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
5xxE-byte sectors (minutes) 6TB models 4TB models 2TB models
Maximum (with verify)
1168.83 814 393
Maximum (without verify)
596.17 380 197
4KN-byte sectors (minutes) 6TB models 4TB models 2TB models
Maximum (with verify)
1185.62 814 393.65
Maximum (without verify)
597.35 380 200.73
Minimum sector interleave 1 to 1
Maximum Internal data rate* 2.32 Gb/s
Sustained transfer rate 100 to 216 MiB/s **
SAS Interface maximum instantaneous transfer rate
1200MB/s* per port
(dual port = 2400MB/s*)
Logical block sizes
512 (default), 520, 524 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.
** MiB/s x 1.048 = MB/s