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Seagate ST336754SS Cheetah 15K.4 SAS Product Manual - Page 22

Start/stop time

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4.2.2 Format command execution time (minutes) Maximum (with verify) Maximum (without verify) ST3146854SS 90 45 ST373454SS 60 30 4.2.3 General performance characteristics ST336754SS 30 15 Minimum sector interleave 1 to 1 Data buffer to/from disc media (one 512-byte logical block)* Minimum Maximum 685 Mbits/sec 1,142 Mbits/sec SAS Interface maximum instantaneous transfer rate 300 Mbytes/sec* per port (dual port = 600 Mbytes/sec*) Logical block sizes Default is 512-byte data blocks Variable 512 to 704 bytes per sector in even number of bytes per sector. If n (number of bytes per sector) is odd, then n-1 will be used. 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 2.0 msec *Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host. 4.3 Start/stop time The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied. If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT command with the START bit equal to 0, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure). If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure). 12 Cheetah 15K.4 SAS Product Manual, Rev. B

Section	Page
1.0 Scope	11
2.0 Standards, compliance and reference documents	13
2.1 Standards	13
2.1.1 Electromagnetic compatibility	13
2.1.1.1 Electromagnetic susceptibility	13
2.2 Compliance	14
2.2.1 Electromagnetic compliance	14
2.3 Reference documents	15
3.0 General description	17
3.1 Standard features	18
3.2 Media description	18
3.3 Performance	18
3.4 Reliability	19
3.5 Formatted capacities	19
3.6 Programmable drive capacity	19
3.7 Factory-installed accessories	19
3.8 Factory-installed options	20
3.9 User-installed accessories	20
4.0 Performance characteristics	21
4.1 Internal drive characteristics	21
4.2 Seek performance characteristics	21
4.2.1 Access time	21
4.2.2 Format command execution time (minutes)	22
4.2.3 General performance characteristics	22
4.3 Start/stop time	22
4.4 Prefetch/multi-segmented cache control	23
4.5 Cache operation	23
4.5.1 Caching write data	24
4.5.2 Prefetch operation	24
4.5.3 Optimizing cache performance for desktop and server applications	25
5.0 Reliability specifications	27
5.1 Error rates	27
5.1.1 Recoverable Errors	27
5.1.2 Unrecoverable Errors	27
5.1.3 Seek errors	28
5.1.4 Interface errors	28
5.2 Reliability and service	28
5.2.1 Annualized Failure Rate (AFR)	28
5.2.2 Preventive maintenance	28
5.2.3 Hot plugging the drive	28
5.2.4 S.M.A.R.T.	29
5.2.5 Thermal monitor	30
5.2.6 Drive Self Test (DST)	31
5.2.6.1 DST failure definition	31
5.2.6.2 Implementation	31
5.2.6.2.1 State of the drive prior to testing	32
5.2.6.2.2 Invoking DST	32
5.2.6.2.3 Short and extended tests	32
5.2.6.2.4 Log page entries	32
5.2.6.2.5 Abort	33
5.2.7 Product warranty	33
6.0 Physical/electrical specifications	35
6.1 AC power requirements	35
6.2 DC power requirements	35
6.2.1 Conducted noise immunity	37
6.2.2 Power sequencing	37
6.2.3 Current profiles	37
6.3 Power dissipation	41
6.4 Environmental limits	44
6.4.1 Temperature	44
6.4.2 Relative humidity	45
6.4.3 Effective altitude (sea level)	45
6.4.4 Shock and vibration	45
6.4.4.1 Shock	45
6.4.4.2 Vibration	47
6.4.5 Air cleanliness	47
6.4.6 Corrosive environment	47
6.4.7 Acoustics	48
6.4.8 Electromagnetic susceptibility	48
6.5 Mechanical specifications	48
7.0 Defect and error management	49
7.1 Drive internal defects/errors	49
7.2 Drive error recovery procedures	49
7.3 SAS system errors	50
8.0 Installation	51
8.1 Drive orientation	51
8.2 Cooling	52
8.3 Drive mounting	53
8.4 Grounding	53
9.0 Interface requirements	55
9.1 SAS features	55
9.1.1 task management functions	55
9.1.2 task management responses	55
9.2 Dual port support	56
9.3 SCSI commands supported	57
9.3.1 Inquiry data	61
9.3.2 Mode Sense data	61
9.3.2.1 ST3146854SS Mode Sense data	63
9.3.2.2 ST373454SS Mode Sense data	64
9.3.2.3 ST336754SS Mode Sense data	65
9.4 Miscellaneous operating features and conditions	66
9.4.1 SAS physical interface	67
9.4.2 Physical characteristics	69
9.4.3 Connector requirements	69
9.4.4 Electrical description	70
9.4.5 Pin descriptions	70
9.4.6 SAS transmitters and receivers	71
9.4.7 Power	71
9.5 Signal characteristics	71
9.5.1 Ready LED Out	71
9.5.2 Differential signals	72
9.5.2.1 Eye masks	72
9.5.2.1.1 Eye masks overview	72
9.5.2.1.2 Receive eye mask	73
9.5.2.1.3 Jitter tolerance masks	73
9.5.2.2 Transmitter signal characteristics	75
9.5.2.3 Receiver signal characteristics	76
9.5.2.3.1 Jitter	76
9.5.2.3.2 Receiver jitter tolerance	77
9.5.2.3.3 Compliant jitter test pattern (CJTPAT)	77
9.5.2.3.4 Impedance specifications	77
9.5.2.4 Electrical TxRx connections	78
9.5.2.4.1 Transmitter characteristics	78
9.5.2.5 Receiver characteristics	81
10.0 Seagate Technology support services	83
Numerics	89
A	89
B	89
C	89
D	89
E	89
F	90
G	90
H	90
I	90
J	90
L	90
M	90
N	91
O	91
P	91
Q	91
R	91
S	91
T	92
U	92
V	92
W	92

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Cheetah 15K.4 SAS Product Manual, Rev. B

4.2.2

Format command execution time (minutes)

4.2.3

General performance characteristics

4.3

Start/stop time

The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has

been applied.

If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START

STOP UNIT command with the START bit equal to 0, the drive becomes ready for normal operations within 20

seconds (excluding the error recovery procedure).

If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY

(ENABLE SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1.

After receiving a START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY

(ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the

drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure).

ST3146854SS

ST373454SS

ST336754SS

Maximum (with verify)

Maximum (without verify)

Minimum sector interleave

1 to 1

Data buffer to/from disc media (one 512-byte logical block)*

Minimum

685 Mbits/sec

Maximum

1,142 Mbits/sec

SAS Interface maximum instantaneous transfer rate

300 Mbytes/sec* per port

(dual port = 600 Mbytes/sec*)

Logical block sizes

Default is 512-byte data blocks

Variable 512 to 704 bytes per sector in even number of bytes per sector. If n (number

of bytes per sector) is odd, then n-1 will be used.

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

2.0 msec

*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or

from the host.