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SEAGATE ENTERPRISE PERFORMANCE 10K HDD V7 PRODUCT MANUAL, REV. C 9
4.0 PERFORMANCE CHARACTERISTICS
This section provides detailed information concerning performance-related characteristics and features of Seagate
Enterprise Performance 10K HDD drives.
4.1 INTERNAL DRIVE CHARACTERISTICS
1200GB models
Drive capacity 1200 GB (formatted, rounded off value)
Read/write data heads 8
Bytes per track 997.9 KBytes (avg, rounded off values)
Bytes per surface 151,674 MB (unformatted, rounded off value)
Tracks per surface (total) 152 KTracks (user accessible)
Tracks per inch 279 KTPI (average)
Peak bits per inch 1925 KBPI
Areal density 538 Gb/in2
Disk rotation speed 10K rpm
Avg rotational latency 2.9 ms
4.2 PERFORMANCE CHARACTERISTICS
4.2.1 Format command execution time for 512-byte sectors (minutes)
Maximum (with verify)
247
Maximum (without verify)
123
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.
4.2.2 General performance characteristics
Minimum sector interleave 1 to 1
Data buffer to/from disk media (one 512-byte logical block)* 1.44 to 2.35 Gb/s
Sustained transfer rate 119 to 195 MiB/s **
125 to 204 MB/s
SAS Interface maximum instantaneous transfer rate 600 MB/s* per port
(dual port = 1200 MB/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 2.9ms
*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
1200GB models