User Manual

Seagate Enterprise Capacity 3.5 HDD v5 SAS Product Manual, Rev. H 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 8TB models 6TB models (formatted, rounded off value)
Read/write data heads 12 12
Bytes/track 2,179,072 Bytes (average, rounded off values)
Bytes/surface 1,300,000 MB (unformatted, rounded off values)
Tracks/surface (total) 33,900 Tracks (user accessible)
Tracks/in 375,000 TPI (average)
Peak bits/in 2,226,000 BPI
Areal density 802 Gb/in2
Internal data rate 2546 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 and 4KN-byte sectors
(minutes)
8TB models 6TB models
Maximum (with verify)
1438 1077
Maximum (without verify)
718 539
Minimum sector interleave 1 to 1
Maximum Internal data rate* 2.32 Gb/s
Sustained transfer rate 109 to 237 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