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Performance characteristics

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4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Savvio drives. 4.1 Internal drive characteristics Drive capacity Read/write data heads Bytes per track Bytes per surface Tracks per surface (total) Tracks per inch Peak bits per inch Areal density Internal data rate Disc rotation speed Avg rotational latency ST9146802SS ST973402SS 146.8 73.4 4 2 489,984 489,984 36,704 36,704 75,373 75,373 150,000 150,000 925,000 925,000 135 135 660-1054 660-1054 10k 10k 3.0 3.0 Gbytes (formatted, rounded off value) Bytes (average, rounded off values) Mbytes (unformatted, rounded off value) Tracks (user accessible) TPI (average) BPI Gbit/in2 Mbits/sec (variable with zone) rpm msec 4.2 Seek performance characteristics See Section 9.4.1, "SAS physical interface" on page 56 and the SAS Interface Manual (part number 100293071) for additional timing details. 4.2.1 Access time Average Single track Full stroke Typical3,4 Typical3,4 Typical3,4 Including controller overhead1, 2 (msec) Read Write 4.0 4.6 0.4 0.6 8.17 8.76 Not including controller overhead1,2 (msec) Read Write 3.8 4.4 0.2 0.4 7.97 8.56 1. Execution time measured from receipt of the Command to the Response. 2. Assumes no errors and no sector has been relocated. 3. Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives. 4. Access time = controller overhead + average seek time and applies to all data transfer commands. Access to data = access time + latency time. Data sheet data except full stroke which was Gen 2.0 data. Savvio 10K.2 SAS Product Manual, Rev. D 11

Section	Page
1.0 Scope	7
2.0 Applicable standards and reference documentation	9
2.1 Standards	9
2.1.1 Electromagnetic compatibility	9
2.1.1.1 Electromagnetic susceptibility	9
2.1.2 Electromagnetic compliance	10
2.1.3 European Union Restriction of Hazardous Substances (RoHS)	11
2.2 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	15
3.5 Formatted capacities	15
3.6 Programmable drive capacity	15
3.7 Factory-installed accessories	15
3.8 Factory-installed options	16
4.0 Performance characteristics	17
4.1 Internal drive characteristics	17
4.2 Seek performance characteristics	17
4.2.1 Access time	17
4.2.2 Format command execution time for 512-byte sectors (minutes)	18
4.2.3 General performance characteristics	18
4.3 Start/stop time	19
4.4 Prefetch/multi-segmented cache control	19
4.5 Cache operation	19
4.5.1 Caching write data	20
4.5.2 Prefetch operation	20
5.0 Reliability specifications	23
5.1 Error rates	23
5.1.1 Recoverable Errors	23
5.1.2 Unrecoverable Errors	23
5.1.3 Seek errors	24
5.1.4 Interface errors	24
5.2 Reliability and service	24
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	24
5.2.2 Preventive maintenance	24
5.2.3 Hot plugging the drive	24
5.2.4 S.M.A.R.T.	25
5.2.5 Thermal monitor	26
5.2.6 Drive Self Test (DST)	27
5.2.6.1 DST failure definition	27
5.2.6.2 Implementation	27
5.2.6.2.1 State of the drive prior to testing	28
5.2.6.2.2 Invoking DST	28
5.2.6.2.3 Short and extended tests	28
5.2.6.2.4 Log page entries	29
5.2.6.2.5 Abort	29
5.2.7 Product warranty	29
6.0 Physical/electrical specifications	31
6.1 AC power requirements	31
6.2 DC power requirements	31
6.2.1 Conducted noise immunity	33
6.2.2 Power sequencing	33
6.2.3 Current profiles	33
6.3 Power dissipation	35
6.4 Environmental limits	36
6.4.1 Temperature	36
6.4.2 Relative humidity	37
6.4.3 Effective altitude (sea level)	37
6.4.4 Shock and vibration	37
6.4.4.1 Shock	37
6.4.4.2 Vibration	39
6.4.5 Air cleanliness	39
6.4.6 Corrosive environment	39
6.4.7 Acoustics	40
6.4.8 Electromagnetic susceptibility	40
6.5 Mechanical specifications	41
7.0 Defect and error management	43
7.1 Drive internal defects/errors	43
7.2 Drive error recovery procedures	43
7.3 SAS system errors	45
7.4 Background Media Scan	45
7.5 Media Pre-Scan	46
7.6 Deferred Auto-Reallocation	46
7.7 Idle Read After Write	46
8.0 Installation	47
8.1 Drive orientation	47
8.2 Cooling	48
8.3 Drive mounting	49
8.4 Grounding	49
9.0 Interface requirements	51
9.1 SAS features	51
9.1.1 task management functions	51
9.1.2 task management responses	51
9.2 Dual port support	52
9.3 SCSI commands supported	53
9.3.1 Inquiry data	57
9.3.2 Mode Sense data	57
9.4 Miscellaneous operating features and conditions	61
9.4.1 SAS physical interface	62
9.4.2 Physical characteristics	65
9.4.3 Connector requirements	65
9.4.4 Electrical description	65
9.4.5 Pin descriptions	65
9.4.6 SAS transmitters and receivers	66
9.4.7 Power	66
9.5 Signal characteristics	66
9.5.1 Ready LED Out	66
9.5.2 Differential signals	67
9.5.2.1 Eye masks	67
9.5.2.1.1 Eye masks overview	67
9.5.2.1.2 Receive eye mask	68
9.5.2.1.3 Jitter tolerance masks	68
9.5.2.2 Transmitter signal characteristics	70
9.5.2.3 Receiver signal characteristics	71
9.5.2.3.1 Jitter	71
9.5.2.3.2 Receiver jitter tolerance	72
9.5.2.3.3 Compliant jitter test pattern (CJTPAT)	72
9.5.2.3.4 Impedance specifications	72
9.5.2.4 Electrical TxRx connections	73
9.5.2.4.1 Transmitter characteristics	73
9.5.2.5 Receiver characteristics	76
10.0 Seagate Technology support services	77
Numerics	79
A	79
B	79
C	79
D	79
E	79
F	80
G	80
H	80
I	80
J	80
L	80
M	80
N	81
O	81
P	81
Q	81
R	81
S	81
T	82
U	82
V	82
W	82

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Savvio 10K.2 SAS Product Manual, Rev. D

4.0

Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Sav-

vio drives.

4.1

Internal drive characteristics

ST9146802SS ST973402SS

Drive capacity

146.8

73.4

Gbytes (formatted, rounded off value)

Read/write data heads

Bytes per track

489,984

Bytes (average, rounded off values)

Bytes per surface

36,704

Mbytes (unformatted, rounded off value)

Tracks per surface (total)

75,373

Tracks (user accessible)

Tracks per inch

150,000

TPI (average)

Peak bits per inch

925,000

BPI

Areal density

135

Gbit/in

Internal data rate

660-1054

Mbits/sec (variable with zone)

Disc rotation speed

10k

rpm

Avg rotational latency

3.0

msec

4.2

Seek performance characteristics

See Section 9.4.1, "SAS physical interface" on page 56 and the

SAS Interface Manual

(part number

100293071) for additional timing details.

4.2.1

Access time

Data sheet data except full stroke which was Gen 2.0 data.

Including controller overhead

(msec)

Execution time measured from receipt of the Command to the Response.

Assumes no errors and no sector has been relocated.

Not including controller overhead

1,2

(msec)

Read

Write

Read

Write

Average

Typical

Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as

measured on a representative sample of drives.

Access time = controller overhead + average seek time and applies to all data transfer commands.

Access to data = access time + latency time.

4.0

4.6

3.8

4.4

Single track

Typical

3,4

0.4

0.6

0.2

0.4

Full stroke

Typical

3,4

8.17

8.76

7.97

8.56