Seagate ST300MM0026 Savvio 10K.2 SAS Product Manual - Page 17

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

11

5.2.2

Format command execution time for 512-byte sectors (minutes)

ST9146802SS

ST973402SS

Maximum (with verify)

104

52

Maximum (without verify)

70

35

5.2.3

General performance characteristics

Minimum sector interleave

1 to 1

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

82 to 132MB/s

Sustained transfer rate

55 to 89MB/s

SAS Interface maximum instantaneous transfer rate

300MB/s* per port

(dual port = 600MB/s*)

Logical block sizes

512 (default), 520 or 528.

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

3.0ms

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

from the host.

5.3

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).

If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does

not receive a NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT

command.

The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 20 sec-

onds (maximum) from removal of DC power. SCSI stop time is 20 seconds. There is no power control switch

on the drive.

Section	Page
1.0 Seagate Technology support services	7
2.0 Scope	8
3.0 Applicable standards and reference documentation	9
3.1 Standards	9
3.1.1 Electromagnetic compatibility	9
3.1.2 Electromagnetic compliance	10
3.1.3 European Union Restriction of Hazardous Substances (RoHS)	11
3.2 Reference documents	11
4.0 General description	12
4.1 Standard features	13
4.2 Media description	13
4.3 Performance	13
4.4 Reliability	14
4.5 Formatted capacities	14
4.6 Programmable drive capacity	14
4.7 Factory-installed accessories	14
4.8 Factory-installed options	15
5.0 Performance characteristics	16
5.1 Internal drive characteristics	16
5.2 Seek performance characteristics	16
5.2.1 Access time	16
5.2.2 Format command execution time for 512-byte sectors (minutes)	17
5.2.3 General performance characteristics	17
5.3 Start/stop time	17
5.4 Prefetch/multi-segmented cache control	18
5.5 Cache operation	18
5.5.1 Caching write data	18
5.5.2 Prefetch operation	19
6.0 Reliability specifications	20
6.1 Error rates	20
6.1.1 Recoverable Errors	20
6.1.2 Unrecoverable Errors	20
6.1.3 Seek errors	21
6.1.4 Interface errors	21
6.2 Reliability and service	21
6.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	21
6.2.2 Preventive maintenance	21
6.2.3 Hot plugging the drive	21
6.2.4 S.M.A.R.T.	22
6.2.5 Thermal monitor	23
6.2.6 Drive Self Test (DST)	24
6.2.7 Product warranty	26
7.0 Physical/electrical specifications	27
7.1 AC power requirements	27
7.2 DC power requirements	27
7.2.1 Conducted noise immunity	29
7.2.2 Power sequencing	29
7.2.3 Current profiles	29
7.3 Power dissipation	31
7.4 Environmental limits	32
7.4.1 Temperature	32
7.4.2 Relative humidity	33
7.4.3 Effective altitude (sea level)	33
7.4.4 Shock and vibration	33
7.4.5 Air cleanliness	35
7.4.6 Corrosive environment	35
7.4.7 Acoustics	36
7.4.8 Electromagnetic susceptibility	36
7.5 Mechanical specifications	37
8.0 Defect and error management	38
8.1 Drive internal defects/errors	38
8.2 Drive error recovery procedures	38
8.3 SAS system errors	39
8.4 Background Media Scan	40
8.5 Media Pre-Scan	40
8.6 Deferred Auto-Reallocation	40
8.7 Idle Read After Write	41
9.0 Installation	42
9.1 Drive orientation	42
9.2 Cooling	43
9.3 Drive mounting	44
9.4 Grounding	44
10.0 Interface requirements	45
10.1 SAS features	45
10.1.1 task management functions	45
10.1.2 task management responses	45
10.2 Dual port support	46
10.3 SCSI commands supported	47
10.3.1 Inquiry data	51
10.3.2 Mode Sense data	51
10.4 Miscellaneous operating features and conditions	55
10.4.1 SAS physical interface	56
10.4.2 Physical characteristics	59
10.4.3 Connector requirements	59
10.4.4 Electrical description	59
10.4.5 Pin descriptions	59
10.4.6 SAS transmitters and receivers	60
10.4.7 Power	60
10.5 Signal characteristics	60
10.5.1 Ready LED Out	60
10.5.2 Differential signals	61
Numerics	71
A	71
B	71
C	71
D	71
E	71
F	72
G	72
H	72
I	72
J	72
L	72
M	72
N	73
O	73
P	73
Q	73
R	73
S	73
T	74
U	74
V	74
W	74

Seagate ST300MM0026 Savvio 10K.2 SAS Product Manual - Page 17

Start/stop time

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