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Seagate Cheetah NS 10K Cheetah NS SAS Product Manual - Page 14

Standard features, Media description, Performance, Reliability

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3.1 Standard features Cheetah NS SAS drives have the following standard features: • Perpendicular recording technology • 1.5 / 3 Gbit Serial Attached SCSI (SAS) interface • Integrated dual port SAS controller • Support for SAS expanders and fanout adapters • Downloadable firmware using the SAS interface • 128 - deep task set (queue) • Supports up to 32 initiators • Jumperless configuration. • User-selectable logical block size (512, 520, 524, or 528 bytes per logical block) • Programmable logical block reallocation scheme • Flawed logical block reallocation at format time • Programmable auto write and read reallocation • Reallocation of defects on command (Post Format) • ECC maximum burst correction length of 400 bits • No preventive maintenance or adjustments required • Dedicated head landing zone • Embedded servo design • Automatic shipping lock • Self diagnostics performed when power is applied to the drive • Zone bit recording (ZBR) • Vertical, horizontal, or top down mounting • Dynamic spindle brake • 16 Mbyte data buffer (see Section 4.5). • Drive Self Test (DST) • Background Media Scan (BGMS) • Power Save 3.2 Media description The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection. 3.3 Performance • Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system performance. • 300 Mbytes/sec maximum instantaneous data transfers. • 10k RPM spindle. Average latency = 2.98 msec • Command queuing of up to 128 commands • Background processing of queue • Supports start and stop commands (spindle stops spinning) • Adaptive seek velocity; improved seek performance 3.4 Reliability • Annualized Failure Rate (AFR) of 0.62% • Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.) • 5-year warranty 8 Cheetah NS SAS Product Manual, Rev. A

Section	Page
1.0 Scope	7
2.0 Standards, compliance and reference documents	9
2.1 Standards	9
2.1.1 Electromagnetic compatibility	9
2.1.1.1 Electromagnetic susceptibility	9
2.2 Compliance	10
2.2.1 Electromagnetic compliance	10
2.3 Reference documents	11
3.0 General description	13
3.1 Standard features	14
3.2 Media description	14
3.3 Performance	14
3.4 Reliability	14
3.5 Formatted capacities	15
3.6 Programmable drive capacity	15
3.7 Factory-installed options	15
4.0 Performance characteristics	17
4.1 Internal drive characteristics	17
4.2 Seek performance	17
4.2.1 Access time	17
4.2.2 Format command execution time (minutes)	18
4.2.3 General performance characteristics	18
4.3 Start/stop time	18
4.4 Prefetch/multi-segmented cache control	19
4.5 Cache operation	19
4.5.1 Caching write data	19
4.5.2 Prefetch operation	20
5.0 Reliability specifications	21
5.1 Error rates	21
5.1.1 Recoverable Errors	21
5.1.2 Unrecoverable Errors	21
5.1.3 Seek errors	22
5.1.4 Interface errors	22
5.2 Reliability and service	22
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)	22
5.2.2 Preventive maintenance	22
5.2.3 Hot plugging the drive	22
5.2.4 S.M.A.R.T.	23
5.2.5 Reporting control	23
5.2.6 Thermal monitor	24
5.2.7 Drive Self Test (DST)	24
5.2.7.1 DST failure definition	25
5.2.7.2 Implementation	25
5.2.7.2.1 State of the drive prior to testing	25
5.2.7.2.2 Invoking DST	25
5.2.7.2.3 Short and extended tests	25
5.2.7.2.4 Log page entries	26
5.2.7.2.5 Abort	26
5.2.8 Product warranty	26
6.0 Physical/electrical specifications	29
6.1 AC power requirements	29
6.2 DC power requirements	29
6.2.1 Conducted noise immunity	30
6.2.2 Power sequencing	30
6.2.3 Current profiles	30
6.3 Power dissipation	31
6.4 Environmental limits	32
6.4.1 Temperature	32
6.4.2 Relative humidity	33
6.4.3 Effective altitude (sea level)	33
6.4.4 Shock and vibration	33
6.4.4.1 Shock	33
6.4.4.2 Vibration	35
6.4.5 Acoustics	35
6.4.6 Air cleanliness	35
6.4.7 Corrosive environment	35
6.4.8 European Union Restriction of Hazardous Substances (RoHS) Directive	36
6.4.9 China Restriction of Hazardous Substances (RoHS) Directive	36
6.4.10 Electromagnetic susceptibility	36
6.5 Mechanical specifications	37
7.0 Defect and error management	39
7.1 Drive internal defects/errors	39
7.2 Drive error recovery procedures	39
7.3 SAS system errors	41
7.4 Background Media Scan	41
7.5 Media Pre-Scan	41
7.6 Deferred Auto-Reallocation	42
7.7 Idle Read After Write	42
8.0 Installation	43
8.1 Drive orientation	43
8.2 Cooling	44
8.3 Drive mounting	45
8.4 Grounding	45
9.0 Interface requirements	47
9.1 SAS features	47
9.1.1 task management functions	47
9.1.2 task management responses	47
9.2 Dual port support	48
9.3 SCSI commands supported	49
9.3.1 Inquiry data	53
9.3.2 Mode Sense data	53
9.3.2.1 ST3400755SS Mode Sense data	55
9.4 Miscellaneous operating features and conditions	56
9.4.1 SAS physical interface	57
9.4.2 Physical characteristics	59
9.4.3 Connector requirements	59
9.4.4 Electrical description	60
9.4.5 Pin descriptions	60
9.4.6 SAS transmitters and receivers	61
9.4.7 Power	61
9.5 Signal characteristics	61
9.5.1 Ready LED Out	61
9.5.2 Differential signals	62
9.5.2.1 Eye masks	62
9.5.2.1.1 Eye masks overview	62
9.5.2.1.2 Receive eye mask	63
9.5.2.1.3 Jitter tolerance masks	63
9.5.2.2 Transmitter signal characteristics	65
9.5.2.3 Receiver signal characteristics	66
9.5.2.3.1 Jitter	66
9.5.2.3.2 Receiver jitter tolerance	67
9.5.2.3.3 Compliant jitter test pattern (CJTPAT)	67
9.5.2.3.4 Impedance specifications	67
9.5.2.4 Electrical TxRx connections	68
9.5.2.4.1 Transmitter characteristics	68
9.5.2.5 Receiver characteristics	71
10.0 Seagate Technology support services	73
Numerics	75
A	75
B	75
C	75
D	75
E	75
F	76
G	76
H	76
I	76
J	76
L	76
M	76
N	76
O	77
P	77
Q	77
R	77
S	77
T	78
U	78
V	78
W	78

Match case Limit results 1 per page

Cheetah NS SAS Product Manual, Rev. A

3.1

Standard features

Cheetah NS SAS drives have the following standard features:

•

Perpendicular recording technology

•

1.5 / 3 Gbit Serial Attached SCSI (SAS) interface

•

Integrated dual port SAS controller

•

Support for SAS expanders and fanout adapters

•

Downloadable firmware using the SAS interface

•

128 - deep task set (queue)

•

Supports up to 32 initiators

•

Jumperless configuration.

•

User-selectable logical block size (512, 520, 524, or 528 bytes per logical block)

•

Programmable logical block reallocation scheme

•

Flawed logical block reallocation at format time

•

Programmable auto write and read reallocation

•

Reallocation of defects on command (Post Format)

•

ECC maximum burst correction length of 400 bits

•

No preventive maintenance or adjustments required

•

Dedicated head landing zone

•

Embedded servo design

•

Automatic shipping lock

•

Self diagnostics performed when power is applied to the drive

•

Zone bit recording (ZBR)

•

Vertical, horizontal, or top down mounting

•

Dynamic spindle brake

•

16 Mbyte data buffer (see Section 4.5).

•

Drive Self Test (DST)

•

Background Media Scan (BGMS)

•

Power Save

3.2

Media description

The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated

with a proprietary protective layer for improved durability and environmental protection.

3.3

Performance

•

Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system

performance.

•

300 Mbytes/sec maximum instantaneous data transfers.

•

10k RPM spindle. Average latency =

2.98 msec

•

Command queuing of up to

128 commands

•

Background processing of queue

•

Supports start and stop commands (spindle stops spinning)

•

Adaptive seek velocity; improved seek performance

3.4

Reliability

•

Annualized Failure Rate (AFR) of 0.62%

•

Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)

•

5-year warranty