Seagate ST9900805SS Savvio 10K.4 FC Product Manual - Page 16

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Savvio 10K.4 FC Product Manual, Rev. A

4.2.2

Format command execution time (minutes)

Note.

There is approximately a 1.5 increase in time to format a SED drive versus a non-SED drive of the same capacity.

4.2.3

General performance characteristics

4.3

Start/stop time

If the Motor Start option is disabled, the drive becomes ready within 20 seconds after DC power is applied. If a

recoverable error condition is detected during the start sequence, the drive executes a recovery procedure and

the time to become ready may exceed 20 seconds. During spin up to ready time, the drive responds to some

commands over the FC interface in less than 3 seconds after application of power. Stop time is 30 seconds

(maximum) from removal of DC power.

If the Motor Start option is enabled, the internal controller accepts the commands listed in the

Fibre Channel

Interface Manual

less than 3 seconds after DC power has been applied. After the Motor Start command has

been received, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery

procedure). The Motor Start command can also be used to command the drive to stop the spindle.

There is no power control switch on the drive.

4.4

Prefetch/multi-segmented cache control

The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many

cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in

cache operations. To select this feature, the host sends the Mode Select command with the proper values in

the applicable bytes in page 08h. Prefetch and cache operations are independent features from the standpoint

that each is enabled and disabled independently using the Mode Select command; however, in actual opera-

tion, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.

All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this

drive family are given in Section 9.3.2

ST9600204FC

ST9450404FC

Maximum (with verify)

181

136

Maximum (without verify)

91

68

Sustainable disk transfer rate*:

Minimum

72MB/s

Maximum

135MB/s

Fibre Channel Interface maximum instantaneous transfer rate

800MB/s* per port

(dual port = 1600MB/s*)

Logical block sizes

Default is 512-byte data blocks

Sector sizes variable to 512, 520, 524 and 528 bytes.

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

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

from the host.

Section	Page
1.0 Scope	7
2.0 Standards, compliance and reference documents	8
2.1 Standards	8
2.1.1 Electromagnetic compatibility	8
2.1.1.1 Electromagnetic susceptibility	8
2.1.2 Electromagnetic compliance	9
2.2 European Union Restriction of Hazardous Substances (RoHS)	9
2.3 Reference documents	10
3.0 General description	11
3.1 Standard features	12
3.2 Media description	12
3.3 Performance	13
3.4 Reliability	13
3.5 Formatted capacities	13
3.6 Programmable drive capacity	14
3.7 Factory-installed options	14
3.8 User-installed accessories	14
4.0 Performance characteristics	15
4.1 Internal drive characteristics	15
4.2 Seek performance	15
4.2.1 Access time	15
4.2.2 Format command execution time (minutes)	16
4.2.3 General performance characteristics	16
4.3 Start/stop time	16
4.4 Prefetch/multi-segmented cache control	16
4.5 Cache operation	17
4.5.1 Caching write data	18
4.5.2 Prefetch operation	18
5.0 Reliability specifications	19
5.1 Error rates	19
5.1.1 Recoverable Errors	19
5.1.2 Unrecoverable Errors	19
5.1.3 Seek errors	20
5.1.4 Interface errors	20
5.2 Reliability and service	20
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)	20
5.2.2 Preventive maintenance	20
5.2.3 Hot plugging the drive	20
5.2.4 S.M.A.R.T.	21
5.2.5 Thermal monitor	22
5.2.6 Drive Self Test (DST)	23
5.2.6.1 DST failure definition	23
5.2.6.2 Implementation	23
5.2.7 Product warranty	25
6.0 Physical/electrical specifications	26
6.1 PowerChoiceTM power management	26
6.1.1 PowerChoice reporting methods	27
6.2 AC power requirements	27
6.3 DC power requirements	28
6.3.1 Conducted noise immunity	30
6.3.2 Power sequencing	30
6.3.3 Current profiles	31
6.4 Power dissipation	33
6.5 Environmental limits	35
6.5.1 Temperature	35
6.5.2 Relative humidity	35
6.5.3 Effective altitude (sea level)	36
6.5.4 Shock and vibration	36
6.5.4.1 Shock	36
6.5.4.2 Vibration	38
6.5.5 Acoustics	38
6.5.6 Air cleanliness	38
6.5.7 Corrosive environment	38
6.5.8 European Union Restriction of Hazardous Substances (RoHS) Directive	39
6.5.9 China Restriction of Hazardous Substances (RoHS) Directive	39
6.5.10 Electromagnetic susceptibility	39
6.6 Mechanical specifications	40
7.0 Defect and error management	41
7.1 Drive internal defects/errors	41
7.2 Drive error recovery procedures	41
7.3 FC-AL system errors	43
7.4 Background Media Scan	43
7.5 Media Pre-Scan	43
7.6 Deferred Auto-Reallocation	44
7.7 Idle Read After Write	44
8.0 Installation	45
8.1 Drive ID/option selection	45
8.2 Drive orientation	45
8.3 Cooling	45
8.4 Drive mounting	46
8.5 Grounding	47
9.0 Interface requirements	48
9.1 FC-AL features	48
9.1.1 Fibre Channel link service frames	48
9.1.2 Fibre Channel task management functions	49
9.1.3 Fibre Channel task management responses	49
9.1.4 Fibre Channel port login	50
9.1.5 Fibre Channel port login accept	51
9.1.6 Fibre Channel Process Login	51
9.1.7 Fibre Channel Process Login Accept	52
9.1.8 Fibre Channel fabric login	52
9.1.9 Fibre Channel fabric accept login	53
9.1.10 Fibre Channel Arbitrated Loop options	54
9.2 Dual port support	54
9.3 SCSI commands supported	55
9.3.1 Inquiry data	59
9.3.2 Mode Sense data	59
9.4 Miscellaneous operating features and conditions	63
9.5 FC-AL physical interface	64
9.5.1 Physical characteristics	64
9.5.1.1 Physical description	64
9.5.2 Connector requirements	65
9.5.3 Electrical description	65
9.5.4 Pin descriptions	65
9.5.5 FC-AL transmitters and receivers	66
9.5.6 Power	67
9.5.7 Fault LED Out	67
9.5.8 Active LED Out	68
9.5.9 Enable port bypass signals	68
9.5.10 Motor start controls	68
9.5.11 SEL_6 through SEL_0 ID lines	69
9.5.11.1 Parallel Enclosure Services Interface (ESI)	69
9.5.12 Device control codes	71
9.6 Signal characteristics	71
9.6.1 TTL input characteristics	71
9.6.2 LED driver signals	72
9.6.3 FC Differential output	72
9.6.4 FC Differential input	72

Seagate ST9900805SS Savvio 10K.4 FC Product Manual - Page 16

Start/stop time, Prefetch/multi-segmented cache control

Page 16 highlights