Seagate ST9900805SS Savvio 10K.4 FC Product Manual - Page 21

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

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The Pass-through state is disabled while the drive performs self test of the FC interface. The control line for an

external port bypass circuit remains in the Enable Bypass state while self test is running. If the bypass circuit is

present, loop operation may continue. If the bypass circuit is not present, loop operation will be halted while the

self test of the FC interface runs.

When the self test completes successfully, the control line to the bypass circuit is disabled and the drive enters

the FC-AL Initializing state. The receiver on the next device in the loop must synchronize to output of the newly

inserted drive.

If the self-test fails, the control line to the bypass circuit remains in the Enable Bypass state.

Note.

It is the responsibility of the systems integrator to assure that no temperature, energy, voltage hazard, or ESD poten-

tial hazard is presented during the hot connect/disconnect operation. Discharge the static electricity from the drive

carrier prior to inserting it into the system.

Caution.

The drive motor must come to a complete stop prior to changing the plane of operation. This time is

required to insure data integrity.

5.2.4

S.M.A.R.T.

S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended

to recognize conditions that indicate imminent drive failure and is designed to provide sufficient warning of a

failure to allow you to back up the data before an actual failure occurs.

Note.

The drive’s firmware monitors specific attributes for degradation over time but can’t predict instantaneous drive fail-

ures.

Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating per-

formance of the drive and the thresholds are optimized to minimize “false” and “failed” predictions.

Controlling S.M.A.R.T.

The operating mode of S.M.A.R.T. is controlled by the DEXCPT and PERF bits on the Informational Exceptions

Control mode page (1Ch). Use the DEXCPT bit to enable or disable the S.M.A.R.T. feature. Setting the DEX-

CPT bit disables all S.M.A.R.T. functions. When enabled, S.M.A.R.T. collects on-line data as the drive performs

normal read and write operations. When the PERF bit is set, the drive is considered to be in “On-line Mode

Only” and will not perform off-line functions.

You can measure off-line attributes and force the drive to save the data by using the Rezero Unit command.

Forcing S.M.A.R.T. resets the timer so that the next scheduled interrupt is in one hour.

You can interrogate the drive through the host to determine the time remaining before the next scheduled mea-

surement and data logging process occurs. To accomplish this, issue a Log Sense command to log page 0x3E.

This allows you to control when S.M.A.R.T. interruptions occur. Forcing S.M.A.R.T. with the RTZ command

resets the timer.

Performance impact

S.M.A.R.T. attribute data is saved to the disk so that the events that caused a predictive failure can be recre-

ated. The drive measures and saves parameters once every hour subject to an idle period on the FC-AL bus.

The process of measuring off-line attribute data and saving data to the disk is interruptable. The maximum on-

line only processing delay is summarized below:

Maximum processing delay

Fully-enabled delay

DEXCPT = 0

S.M.A.R.T. delay times

75 ms

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 21

This allows you to control when S.M.A.R.T. interruptions occur. Forcing S.M.A.R.T. with the RTZ

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