Seagate ST3146855LC Cheetah 15K.5 SCSI Product Manual - Page 47

Cheetah 15K.5 SCSI Product Manual, Rev. H

41

8.0

Installation

Note.

These drives are designed to be used only on single-ended (SE) or low voltage differential (LVD)

busses. Do not install these drives on a high voltage differential (HVD) bus.

The first thing to do when installing a drive is to set the drive SCSI ID and set up certain operating options. This

is usually done by installing small shorting jumpers on the J5 connector (see Figure 10), or via the drive to host

I/O signals on the LC model. Some users connect cables to J5 and perform the set-up using remote switches.

Configure drive options

For option jumper locations and definitions refer to Figures 10 and 11. Drive default mode parameters are not

normally needed for installation. Refer to Section 9.3.2 for default mode parameters if they are needed.

•

Ensure that the SCSI ID of the drive is not the same as the host adapter. Most host adapters use SCSI ID 7

because ID 7 is the highest priority on both 8 and 16 bit data buses.

•

If multiple devices are on the bus set the drive SCSI ID to one that is not presently used by other devices on

the bus.

•

If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. The user, system integra-

tor, or host equipment manufacturer must provide external terminators.

Note.

For additional information about terminator requirements, refer to Sections 9.8 and 9.9.

•

Set all appropriate option jumpers for desired operation prior to power on. If jumpers are changed after

power has been applied, recycle the drive power to make the new settings effective.

•

Installation instructions are provided by host system documentation or with any additionally purchased drive

installation software. If necessary see Section 10 for Seagate support services telephone numbers.

•

Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as

the manufacturer labels contain information required when servicing the product.

Formatting

•

Drives are shipped from the factory low level formatted with 512 byte sectors.

8.1

Drive ID/option select header

Figure 10 shows the drive ID select jumper connector. Figure 11 shows the option select jumper connector for

all models. Figure 11 shows the drive’s J6 jumper connector. The notes following the figures describe the func-

tions of the various jumper positions on the connectors. Suggested part number for the jumpers used on J6 is

Molex 52747-0211 (Seagate part number 77679052). A bag with the two jumper plug types is shipped with the

standard OEM drives.

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

Seagate ST3146855LC Cheetah 15K.5 SCSI Product Manual - Page 47

Installation - jumper

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