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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 ST9600204SS ST9600104SS 600 6 677,557 100,021 147,620 240,000 1,430 343 1.62 10K 3.0 ST9450404SS ST9450304SS 450 6 677,557 75,016 110,715 180,000 1,430 257.4 1.62 10K 3.0 GB (formatted, rounded off value) Bytes (average, rounded off values) MB (unformatted, rounded off value) Tracks (user accessible) TPI (average) kBPI Gb/in2 Gb/s (variable with zone) rpm ms 4.2 Seek performance characteristics See Section 10.4.1, "SAS physical interface" on page 60 and the SAS Interface Manual (part number 100293071) for additional timing details. 4.2.1 Access time Average Single track Full stroke Average Single track Full stroke 600GB Typical3,4 450GB Typical3,4 Including controller overhead1,2 (ms) Read Write 4.0 4.6 0.50 0.76 8.01 8.38 4.0 4.6 0.50 0.76 7.96 8.51 Not including controller overhead1,2 (ms) Read Write 3.8 4.4 0.30 0.56 7.81 8.18 3.8 4.4 0.30 0.56 7.76 8.31 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. Savvio 10K.4 SAS Product Manual, Rev. C 9

Section	Page
1.0 Scope	9
2.0 Applicable standards and reference documentation	10
2.1 Standards	10
2.1.1 Electromagnetic compatibility	10
2.1.1.1 Electromagnetic susceptibility	10
2.1.2 Electromagnetic compliance	11
2.1.3 European Union Restriction of Hazardous Substances (RoHS)	12
2.2 Reference documents	12
3.0 General description	13
3.1 Standard features	14
3.2 Media description	14
3.3 Performance	15
3.4 Reliability	15
3.5 Formatted capacities	15
3.6 Programmable drive capacity	15
3.7 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	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 Failure (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 Thermal monitor	24
5.2.6 Drive Self Test (DST)	25
5.2.6.1 DST failure definition	25
5.2.6.2 Implementation	25
5.2.7 Product warranty	27
6.0 Physical/electrical specifications	28
6.1 PowerChoiceTM power management	28
6.1.1 PowerChoice reporting methods	29
6.2 AC power requirements	29
6.3 DC power requirements	29
6.3.1 Conducted noise immunity	33
6.3.2 Power sequencing	33
6.3.3 Current profiles	34
6.4 Power dissipation	36
6.5 Environmental limits	39
6.5.1 Temperature	39
6.5.2 Relative humidity	40
6.5.3 Effective altitude (sea level)	40
6.5.4 Shock and vibration	40
6.5.4.1 Shock	41
6.5.4.2 Vibration	43
6.5.5 Air cleanliness	43
6.5.6 Corrosive environment	43
6.5.7 Acoustics	44
6.5.8 Electromagnetic susceptibility	44
6.6 Mechanical specifications	45
7.0 About self-encrypting drives	46
7.1 Data encryption	46
7.2 Controlled access	46
7.2.1 Admin SP	46
7.2.2 Locking SP	47
7.2.3 Default password	47
7.3 Random number generator (RNG)	47
7.4 Drive locking	47
7.5 Data bands	47
7.6 Cryptographic erase	48
7.7 Authenticated firmware download	48
7.8 Power requirements	48
7.9 Supported commands	48
8.0 Defect and error management	49
8.1 Drive internal defects/errors	49
8.2 Drive error recovery procedures	49
8.3 SAS system errors	50
8.4 Background Media Scan	51
8.5 Media Pre-Scan	51
8.6 Deferred Auto-Reallocation	51
8.7 Idle Read After Write	52
8.8 Protection Information (PI)	52
8.8.1 Levels of PI	52
8.8.2 Setting and determining the current Type Level	52
8.8.3 Identifying a Protection Information drive	53
9.0 Installation	54
9.1 Drive orientation	54
9.2 Cooling	55
9.3 Drive mounting	56
9.4 Grounding	56
10.0 Interface requirements	57
10.1 SAS features	57
10.1.1 task management functions	57
10.1.2 task management responses	57
10.2 Dual port support	58
10.3 SCSI commands supported	59
10.3.1 Inquiry data	63
10.3.2 Mode Sense data	63
10.4 Miscellaneous operating features and conditions	67
10.4.1 SAS physical interface	68
10.4.2 Physical characteristics	71
10.4.3 Connector requirements	71
10.4.4 Electrical description	71
10.4.5 Pin descriptions	71
10.4.6 SAS transmitters and receivers	72
10.4.7 Power	72
10.5 Signal characteristics	72
10.5.1 Ready LED Out	72
10.5.2 Differential signals	73
10.6 SAS-2 Specification compliance	73
10.7 Additional information	73
11.0 Seagate Technology support services	74
Numerics	77
A	77
B	77
C	77
D	77
E	78
F	78
G	78
H	78
I	78
J	78
K	78
L	78
M	79
N	79
O	79
P	79
Q	79
R	80
S	80
T	80
U	81
V	81
W	81

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Savvio 10K.4 SAS Product Manual, Rev. C

4.0

Performance characteristics

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

vio drives.

4.1

Internal drive characteristics

ST9600204SS

ST9450404SS

ST9600104SS

ST9450304SS

Drive capacity

600

450

GB (formatted, rounded off value)

Read/write data heads

Bytes per track

677,557

Bytes (average, rounded off values)

Bytes per surface

100,021

75,016

MB (unformatted, rounded off value)

Tracks per surface (total)

147,620

110,715

Tracks (user accessible)

Tracks per inch

240,000

180,000

TPI (average)

Peak bits per inch

1,430

kBPI

Areal density

343

257.4

Gb/in

Internal data rate

1.62

Gb/s (variable with zone)

Disc rotation speed

10K

rpm

Avg rotational latency

3.0

4.2

Seek performance characteristics

See Section 10.4.1, "SAS physical interface" on page 60 and the

SAS Interface Manual

(part number

100293071) for additional timing details.

4.2.1

Access time

Including controller overhead

(ms)

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

Average

600GB

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

0.50

0.76

0.30

0.56

Full stroke

8.01

8.38

7.81

8.18

Average

450GB

Typical

3,4

4.0

4.6

3.8

4.4

Single track

0.50

0.76

0.30

0.56

Full stroke

7.96

8.51

7.76

8.31

Assumes no errors and no sector has been relocated.

Not including controller overhead

1,2

(ms)

Read

Write

Read

Write