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Seagate ST3146855LC Cheetah 15K.5 SCSI Product Manual - Page 50

Function description, Note., Default - jumper settings

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8.1.2 Function description J6 jumper installation SE On Off Jumper function description Forces drive to use single-ended I/O drivers/receivers only. Drive can operate on the interface in low voltage differential mode or single-ended, depending on the voltage state of the I/O "DIFFSNS" line. Default is SE jumper not installed. DS ME Off Off Off On On Off On On Spindle starts immediately after power up - Default setting. Drive spindle does not start until Start Unit command received from host. Spindle Startup is delayed by SCSI ID times 12 seconds after power is applied, i.e., drive 0 spindle starts immediately when DC power connected, drive 1 starts after 12 second delay, drive 2 starts after 24 second delay, etc. Drive spindle starts when Start Unit command received from host. Delayed start feature is overridden and does not apply when ME jumper is installed. WP On Entire drive is write protected. Off Drive is not write protected. Default is WP jumper not installed. PD On Parity checking and parity error reporting by the drive is disabled. Off Drive checks for parity and reports result of parity checking to host. Default is PD jumper not installed. RES Off Reserved jumper position. Default is no RES jumper installed. TP Off The drive does not supply terminator power to external terminators or to the SCSI bus I/O cable. On Drive supplies power to SCSI bus I/O cable. When drives have differential I/O circuits, a jumper on the TP position may be needed to power external terminators (see system docu- mentation). These drives do not have terminator circuits on the drive. Note. J6 does not exist on the LC model and is supported on the LW model only. 44 Cheetah 15K.5 SCSI Product Manual, Rev. H

Section	Page
Cover	1
Contents	3
1.0 Scope	7
2.0 Applicable standards and reference documentation	9
2.1 Standards	9
2.1.1 Electromagnetic compatibility	9
2.1.2 Electromagnetic susceptibility	9
2.2 Electromagnetic compliance	10
2.3 European Union Restriction of Hazardous Substances (RoHS)	10
2.4 Reference documents	11
3.0 General description	13
3.1 Standard features	14
3.2 Media characteristics	14
3.3 Performance	15
3.4 Reliability	15
3.5 Formatted capacities	15
3.5.1 Programmable drive capacity	16
3.6 Factory installed accessories	16
3.7 Options (factory installed)	16
3.8 Accessories	16
4.0 Performance characteristics	17
4.1 Internal drive characteristics (transparent to user)	17
4.2 SCSI performance characteristics (visible to user)	17
4.2.1 Seek time	18
4.2.2 Format command execution time (minutes) [1]	18
4.2.3 Generalized performance characteristics	18
4.3 Start/stop time	19
4.4 Prefetch/multi-segmented cache control	19
4.5 Cache operation	19
4.5.1 Caching write data	20
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 Error	21
5.1.3 Seek errors	22
5.2 Reliability and service	22
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)	22
5.2.2 Preventive maintenance	22
5.2.3 Hot plugging Cheetah 15K.5 SCSI disc drives	23
5.2.4 S.M.A.R.T.	23
5.2.5 Thermal monitor	25
5.2.6 Drive Self Test (DST)	25
5.2.6.1 DST Failure Definition	26
5.2.6.2 Implementation	26
5.2.6.2.1 State of the drive prior to testing	26
5.2.6.2.2 Invoking DST	26
5.2.6.2.3 Short and extended tests	26
5.2.6.2.4 Log page entries	27
5.2.6.2.5 Abort	27
5.2.7 Product warranty	27
6.0 Physical/electrical specifications	29
6.1 AC power requirements	29
6.2 DC power requirements	29
6.2.1 Conducted noise immunity	31
6.2.2 Power sequencing	31
6.2.3 Current profile	31
6.3 Power dissipation	33
6.4 Environmental limits	36
6.4.1 Temperature	36
6.4.2 Relative humidity	36
6.4.3 Effective altitude (sea level)	36
6.4.4 Shock and vibration	37
6.4.4.1 Shock	37
6.4.4.2 Vibration	39
6.4.5 Air cleanliness	39
6.4.6 Corrosive environment	39
6.4.7 Acoustics	40
6.4.8 Electromagnetic susceptibility	40
6.5 Mechanical specifications	40
7.0 Defect and error management	43
7.1 Drive internal defects	43
7.2 Drive error recovery procedures	43
7.3 SCSI systems errors	45
7.4 Background Media Scan	45
7.5 Media Pre-Scan	45
7.6 Deferred Auto-Reallocation	46
7.7 Idle Read After Write	46
8.0 Installation	47
8.1 Drive ID/option select header	47
8.1.1 Notes for Figures 10 and 11.	49
8.1.2 Function description	50
8.2 Drive orientation	51
8.3 Cooling	51
8.4 Drive mounting	52
8.5 Grounding	52
9.0 Interface requirements	53
9.1 General description	53
9.2 SCSI interface messages supported	53
9.3 SCSI interface commands supported	54
9.3.1 Inquiry Vital Product data	58
9.3.2 Mode Sense data	59
9.4 SCSI bus conditions and miscellaneous features supported	63
9.5 Synchronous data transfer	64
9.5.1 Synchronous data transfer periods supported	64
9.5.2 REQ/ACK offset	64
9.6 Physical interface	64
9.6.1 DC cable and connector	65
9.6.2 SCSI interface physical description	66
9.6.3 SCSI interface cable requirements	67
9.6.3.1 Cable requirements	67
9.6.4 Mating connectors	67
9.6.4.1 Mating connectors for LW model drives	68
9.6.4.2 Mating connectors for LC model drives	68
9.7 Electrical description	76
9.7.1 Multimode—SE and LVD alternatives	76
9.7.1.1 General cable characteristics	77
9.7.1.2 Single-ended drivers/receivers	77
9.7.1.3 Cables for low voltage differential drivers/receivers	78
9.8 Terminator requirements	79
9.9 Terminator power	79
9.10 Disc drive SCSI timing	80
9.11 Drive activity LED	82