Seagate ST3300657SS Cheetah 15K.7 FC Product Manual - Page 16

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Cheetah 15K.7 FC Product Manual, Rev. B

4.2.3

General performance characteristics

Sustainable disc transfer rate*:

Minimum

122 Mbytes/sec (typical)

Maximum

204 Mbytes/sec (typical)

Fibre Channel Interface maximum instantaneous transfer rate

400 Mbytes/sec* per port

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

Average rotational latency

2.0 msec

*Assumes no errors and no relocated logical blocks.

Rate measured from the start of the first logical block transfer to or from the host.

1MB/sec = 1,000,000 bytes/sec

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 Table 18.

Section	Page
1.0 Scope	7
2.0 Applicable standards and reference documentation	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	13
3.3 Performance	13
3.4 Reliability	13
3.5 Formatted capacities	13
3.5.1 Programmable drive capacity	14
3.6 Factory-installed options	14
3.7 User-installed accessories	14
4.0 Performance characteristics	15
4.1 Internal drive characteristics	15
4.2 Seek performance characteristics	15
4.2.1 Access time	15
4.2.2 Format command execution time (minutes)	15
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	17
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 AC power requirements	26
6.2 DC power requirements	26
6.2.1 Conducted noise immunity	29
6.2.2 Power sequencing	29
6.2.3 Current profiles	29
6.3 Power dissipation	32
6.4 Environmental limits	34
6.4.1 Temperature	34
6.4.2 Relative humidity	35
6.4.3 Effective altitude (sea level)	35
6.4.4 Shock and vibration	36
6.4.4.1 Shock	36
6.4.4.2 Vibration	38
6.4.5 Acoustics	38
6.4.6 Air cleanliness	38
6.4.7 Corrosive environment	38
6.4.8 RoHS compliance statement	39
6.4.9 Electromagnetic susceptibility	39
6.5 Mechanical specifications	40
7.0 About self-encrypting drives	41
7.1 Data encryption	41
7.2 Controlled access	41
7.2.1 Admin SP	41
7.2.2 Locking SP	42
7.2.3 Default password	42
7.3 Random number generator (RNG)	42
7.4 Drive locking	42
7.5 Data bands	42
7.6 Cryptographic erase	43
7.7 Authenticated firmware download	43
7.8 Power requirements	43
7.9 Supported commands	43
8.0 Defect and error management	44
8.1 Drive internal defects/errors	44
8.2 Drive error recovery procedures	44
8.3 FC-AL system errors	46
8.4 Background Media Scan	47
8.5 Media Pre-Scan	47
8.6 Deferred Auto-Reallocation	47
8.7 Idle Read After Write	48
9.0 Installation	49
9.1 Drive ID/option selection	49
9.2 Drive orientation	49
9.3 Cooling	50
9.4 Drive mounting	51
9.5 Grounding	51
10.0 Interface requirements	52
10.1 FC-AL features	52
10.1.1 Fibre Channel link service frames	52
10.1.2 Fibre Channel task management functions	53
10.1.3 Fibre Channel task management responses	53
10.1.4 Fibre Channel port login	54
10.1.5 Fibre Channel port login accept	55
10.1.6 Fibre Channel Process Login	55
10.1.7 Fibre Channel Process Login Accept	56
10.1.8 Fibre Channel fabric login	56
10.1.9 Fibre Channel fabric accept login	57
10.1.10 Fibre Channel Arbitrated Loop options	58
10.2 Dual port support	58
10.3 SCSI commands supported	58
10.3.1 Inquiry data	63
10.3.2 Mode Sense data	63
10.4 Miscellaneous operating features and conditions	68
10.5 FC-AL physical interface	69
10.5.1 Physical characteristics	69
10.5.1.1 Physical description	69
10.5.2 Connector requirements	70
10.5.3 Electrical description	70
10.5.4 Pin descriptions	70
10.5.5 FC-AL transmitters and receivers	71
10.5.6 Power	72
10.5.7 Fault LED Out	72
10.5.8 Active LED Out	73
10.5.9 Enable port bypass signals	73
10.5.10 Motor start controls	73
10.5.11 SEL_6 through SEL_0 ID lines	74
10.5.11.1 Parallel Enclosure Services Interface (ESI)	74
10.5.12 Device control codes	76
10.6 Signal characteristics	76
10.6.1 TTL input characteristics	76
10.6.2 LED driver signals	77
10.6.3 FC Differential output	77
10.6.4 FC Differential input	77

Seagate ST3300657SS Cheetah 15K.7 FC Product Manual - Page 16

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

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