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4.0
P
ERFORMANCE CHARACTERISTICS
This section provides detailed information concerning performance-related characteristics and features of Seagate
Enterprise Performance 10K HDD drives.
4.1
I
NTERNAL DRIVE CHARACTERISTICS
1200GB models
Drive capacity
1200
Read/write data heads
8
Bytes per track
997.9
Bytes per surface
151,674
Tracks per surface (total)
152
Tracks per inch
279
Peak bits per inch
1925
Areal density
538
Disk rotation speed
10K
Avg rotational latency
2.9
4.2
P
ERFORMANCE CHARACTERISTICS
4.2.1
Format command execution time for 512-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.
4.2.2
General performance characteristics
Minimum sector interleave
Data buffer to/from disk media (one 512-byte logical block)*
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
S
E
P
EAGATE
NTERPRISE
ERFORMANCE
1200GB models
247
123
10K HDD
7 P
V
RODUCT
GB (formatted, rounded off value)
KBytes (avg, rounded off values)
MB (unformatted, rounded off value)
KTracks (user accessible)
KTPI (average)
KBPI
Gb/in2
rpm
ms
1 to 1
1.44 to 2.35 Gb/s
119 to 195 MiB/s **
125 to 204 MB/s
600 MB/s* per port
(dual port = 1200 MB/s*)
Yes
Negligible
2.9ms
M
, R
. C
ANUAL
EV
9
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