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Seagate ST300MP0014 Savvio 15K.3 SAS Product Manual - Page 19

Performance characteristics

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5.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Savvio drives. 5.1 Internal drive characteristics Drive capacity Read/write data heads Tracks per surface (total) Tracks per in Peak bits per in Areal density Internal data rate Disk rotation speed Avg rotational latency ST9300653SS ST9300553SS ST9300453SS 300 4 107,400 273,000 1601 448 1554 - 2267 15K 2.0 ST9146853SS ST9146753SS ST9146653SS 146 2 107,400 273,000 1601 448 1554 - 2267 15K 2.0 GB (formatted, rounded off value) Tracks (user accessible including spare tracks) KTPI (average) KBPI Gb/in2 Mb/s (variable with zone) RPM ms 5.2 Seek performance characteristics See Section 12.4.1, "SAS physical interface" on page 59 and the SAS Interface Manual (part number 100293071) for additional timing details. 5.2.1 Access time Average Single track Full stroke Typical3,4 Typical3,4 Typical3,4 Including controller overhead1, 2 (ms) Read Write 2.9 3.3 0.4 0.6 5.5 5.8 Not including controller overhead1, 2 (ms) Read Write 2.7 3.1 0.2 0.4 5.3 5.6 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 15K.3 SAS Product Manual, Rev. E 11

Section	Page
1.0 Seagate Technology support services	9
2.0 Scope	10
3.0 Applicable standards and reference documentation	11
3.1 Standards	11
3.1.1 Electromagnetic compatibility	11
3.1.2 Electromagnetic compliance	12
3.1.3 European Union Restriction of Hazardous Substances (RoHS)	13
3.1.4 China Restriction of Hazardous Substances (RoHS) Directive	13
3.2 Reference documents	14
4.0 General description	15
4.1 Standard features	16
4.2 Media description	16
4.3 Performance	17
4.4 Reliability	17
4.5 Formatted capacities	17
4.6 Programmable drive capacity	18
4.7 Factory installed options	18
5.0 Performance characteristics	19
5.1 Internal drive characteristics	19
5.2 Seek performance characteristics	19
5.2.1 Access time	19
5.2.2 Format command execution time for 512-byte sectors (minutes)	20
5.2.3 General performance characteristics	20
5.3 Start/stop time	20
5.4 Prefetch/multi-segmented cache control	21
5.5 Cache operation	21
5.5.1 Caching write data	22
5.5.2 Prefetch operation	22
6.0 Reliability specifications	23
6.1 Error rates	23
6.1.1 Recoverable Errors	23
6.1.2 Unrecoverable Errors	23
6.1.3 Seek errors	24
6.1.4 Interface errors	24
6.2 Reliability and service	24
6.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	24
6.2.2 Preventive maintenance	24
6.2.3 Hot plugging the drive	24
6.2.4 S.M.A.R.T.	25
6.2.5 Thermal monitor	26
6.2.6 Drive Self Test (DST)	27
6.2.7 Product warranty	29
7.0 Physical/electrical specifications	30
7.1 PowerChoiceTM power management	30
7.1.1 PowerChoice reporting methods	31
7.2 AC power requirements	31
7.3 DC power requirements	31
7.3.1 Conducted noise immunity	34
7.3.2 Power sequencing	34
7.3.3 Current profiles	35
7.4 Power dissipation	37
7.5 Environmental limits	39
7.5.1 Temperature	39
7.5.2 Relative humidity	39
7.5.3 Effective altitude (sea level)	40
7.5.4 Shock and vibration	40
7.5.5 Air cleanliness	42
7.5.6 Corrosive environment	42
7.5.7 Acoustics	42
7.5.8 Electromagnetic susceptibility	42
7.6 Mechanical specifications	43
8.0 About FIPS	44
9.0 About self-encrypting drives	46
9.1 Data encryption	46
9.2 Controlled access	46
9.2.1 Admin SP	46
9.2.2 Locking SP	46
9.2.3 Default password	47
9.3 Random number generator (RNG)	47
9.4 Drive locking	47
9.5 Data bands	47
9.6 Cryptographic erase	47
9.7 Authenticated firmware download	47
9.8 Power requirements	48
9.9 Supported commands	48
9.10 Sanitize - CRYPTOGRAPHIC ERASE	48
9.11 RevertSP	48
10.0 Defect and error management	49
10.1 Drive internal defects/errors	49
10.2 Drive error recovery procedures	49
10.3 SAS system errors	50
10.4 Background Media Scan	51
10.5 Media Pre-Scan	51
10.6 Deferred Auto-Reallocation	51
10.7 Idle Read After Write	51
10.8 Protection Information (PI)	52
10.8.1 Levels of PI	52
10.8.2 Setting and determining the current Type Level	52
10.8.3 Identifying a Protection Information drive	53
11.0 Installation	54
11.1 Drive orientation	54
11.2 Cooling	55
11.3 Drive mounting	56
11.4 Grounding	56
12.0 Interface requirements	57
12.1 SAS features	57
12.1.1 Task management functions	57
12.1.2 Task management responses	57
12.2 Dual port support	58
12.3 SCSI commands supported	58
12.3.1 Inquiry data	62
12.3.2 Mode Sense data	62
12.4 Miscellaneous operating features and conditions	66
12.4.1 SAS physical interface	67
12.4.2 Physical characteristics	70
12.4.3 Connector requirements	70
12.4.4 Electrical description	70
12.4.5 Pin descriptions	70
12.4.6 SAS transmitters and receivers	71
12.4.7 Power	71
12.5 Signal characteristics	71
12.5.1 Ready LED Out	71
12.5.2 Differential signals	72
12.6 SAS-2 Specification compliance	72
12.7 Additional information	72
Numerics	73
A	73
B	73
C	73
D	73
E	74
F	74
G	74
H	74
I	74
J	74
K	74
L	74
M	75
N	75
O	75
P	75
Q	75
R	75
S	76
T	76
U	76
V	76
W	77