Seagate ST300MM0048, Product Manual

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Seagate Enterprise Performance 10K HDD v8 Product Manual, Rev. A 13
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
600GB 300GB Models
Sector size 512 512
Native Native
Drive capacity 600 300 GB (formatted, rounded off value)
Read/write data heads 4 2
Bytes per track 997.9 997.9 KBytes (avg, rounded off values)
Bytes per surface 151,674 151,674 MBytes (unformatted, rounded off value)
Tracks per surface (total) 152 152 Ktracks (user accessible, rounded off values)
Tracks per inch 279 279 KTPI (avg, rounded off values)
Peak bits per inch 1925 1925 Kbits/in
Areal density 538 538 Gb/in2
Disk rotation speed 10K 10K rpm
Avg rotational latency 2.9 2.9 ms
4.2 Performance characteristics
4.2.1 Format command execution time (minutes)
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
512-byte sectors 600GB models 300GB models
Maximum (with verify)
122 61
Maximum (without verify) 61 31
Sustained transfer rate for 512 native
119 to 205 MiB/s **
125 to 215 MB/s
SAS Interface maximum instantaneous transfer rate
1200 MB/s* per port
(dual port = 2400 MB/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 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