Seagate ST318405LW/LC, ST39205LW/LC, ST336705LW/LC manual General description

Page 15

Cheetah 36XL Product Manual, Rev. E

5

3.0General description

Cheetah 36XL drives combine giant magnetoresistive (GMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a wide SCSI Ultra160 interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, net- work servers, mainframes, and supercomputers.

Ultra160 SCSI uses negotiated transfer rates. These transfer rates will occur only if your host adapter supports these data transfer rates and is compatible with the required hardware requirements of the I/O circuit type. This drive also operates at Ultra160 data transfer rates.

Table 1 lists the features that differentiate the Cheetah 36XL models.

Table 1:

Drive model number vs. differentiating features

 

 

 

 

 

 

 

 

 

 

 

 

Number

 

 

 

 

 

 

of active

 

Number of I/O

Number of I/O

Data buffer

Model number

heads

I/O circuit type [1]

connector pins

data bus bits

size (MB)

 

 

 

 

 

 

 

 

 

 

 

 

ST336705LW

8

Single-ended (SE) and low

68

16

4

 

 

 

voltage differential (LVD)

 

 

 

 

 

 

 

 

 

ST336705LC

8

Single-ended (SE) and low

80

16

4

 

 

 

voltage differential (LVD)

 

 

 

 

 

 

 

 

 

ST318405LW

4

Single-ended (SE) and low

68

16

4

 

 

 

voltage differential (LVD)

 

 

 

 

 

 

 

 

 

ST318405LC

4

Single-ended (SE) and low

80

16

4

 

 

 

voltage differential (LVD)

 

 

 

 

 

 

 

 

 

ST39205LW

2

Single-ended (SE) and low

68

16

4

 

 

 

voltage differential (LVD)

 

 

 

 

 

 

 

 

 

ST39205LC

2

Single-ended (SE) and low

80

16

4

 

 

 

voltage differential (LVD)

 

 

 

 

 

 

 

 

 

 

[1]See Section 9.6 for details and definitions.

The drive records and recovers data on approximately 3.0-inch (74 mm) non-removable discs.

The drive supports the Small Computer System Interface (SCSI) as described in the ANSI SCSI interface specifications to the extent described in this manual (Volume 1), which defines the product performance char- acteristics of the Cheetah 36XL family of drives, and the SCSI Interface Product Manual, part number 75789509, which describes the general interface characteristics of this and other families of Seagate SCSI drives.

The drive’s interface supports multiple initiators, disconnect/reconnect, and automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets (logical block addressing is used).

The head and disc assembly (HDA) is sealed at the factory. Air circulates within the HDA through a non- replaceable filter to maintain a contamination-free HDA environment.

Refer to Figure 2 for an exploded view of the drive. This exploded view is for information only—never disassem- ble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires special facilities. The drive contains no replaceable parts. Opening the HDA voids your warranty.

Cheetah 36XL drives use a dedicated landing zone at the innermost radius of the media to eliminate the possi- bility of destroying or degrading data by landing in the data zone. The drive automatically goes to the landing zone when power is removed.

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Contents Cheetah 36XL Family ST336705LW/LC ST318405LW/LC ST39205LW/LC Page Cheetah 36XL Family ST336705LW/LC ST318405LW/LC ST39205LW/LC Page Revision Date Writer/Engineer Sheets Affected Revision status summary sheetPage Contents Interface requirements Defect and error managementInstallation Seagate Technology support servicesCheetah 36XL Product Manual, Rev. E Vii List of FiguresPage Cheetah 36XL family drive ST336705LC shown ScopeCheetah 36XL Product Manual, Rev. E Applicable standards and reference documentation Australian C-Tick Korean MICTaiwanese Bsmi General description Cheetah 36XL family drive Reliability Cheetah 36XL Product Manual, Rev. E Standard featuresMedia characteristics PerformanceProgrammable drive capacity Factory installed accessoriesOptions factory installed Formatted capacitiesPerformance characteristics Ultra2 Scsi Ultra160 Scsi Start/stop timePrefetch/multi-segmented cache control Caching write data Cache operationPrefetch operation Cheetah 36XL Product Manual, Rev. E Cheetah 36XL Product Manual, Rev. E Reliability specifications Service philosophy Reliability and servicePreventive maintenance Service lifeControlling S.M.A.R.T 7 S.M.A.R.TPredictive failures Performance impactReporting control Determining rateInvoking DST State of the drive prior to testingDST Failure Definition ImplementationLog page entries Product warrantyShort test Function Code 001b Extended test Function Code 010bProduct repair and return information Cheetah 36XL Product Manual, Rev. E Physical/electrical specifications AC power requirementsDC power requirements Power sequencing Conducted noise immunity3 12 V Current profile Typical ST336705 drive +12 V current profile Typical ST39205 drive +12 V current profile TypicalST318405 drive +5 V current profile Power dissipation ST336705 Os per Second Cheetah 36XL Product Manual, Rev. E ST318405Temperature ST39205Environmental limits Shock Relative humidityEffective altitude sea level Shock and vibrationPackage size Packaged/product weight Drop height Recommended mounting Air cleanliness VibrationAcoustics LW mounting configuration dimensions LC mounting configuration dimensions Defect and error management Drive error recovery proceduresDrive internal defects Scsi systems errors Drive ID/option select header InstallationConfigure drive options FormattingDo not install jumpers retain cover J5 jumper header on LW model only J2 option select header Does not apply to LC models Cheetah 36XL Product Manual, Rev. E Function descriptionGrounding Drive orientationCooling Drive mountingScsi interface messages supported Interface requirementsScsi interface commands supported Cheetah 36XL Product Manual, Rev. E Commands supported by Cheetah 36XL family drive Inquiry Vital Product data Mode Sense dataCheetah 36XL Product Manual, Rev. E Mode Sense Data Cheetah 36XL Product Manual, Rev. E Mode sense data, ST318405 values Bytes Cheetah 36XL Product Manual, Rev. E Mode sense data, ST39205 values Bytes Cheetah 36XL Product Manual, Rev. E Condition/features supported DC cable and connector 2 REQ/ACK offsetPhysical interface Pin Power Scsi interface cable requirements Scsi interface physical descriptionST336705LC, ST318405LC and ST39205LC Mating connectorsMating connectors for LW model drives Mating connectors for LC model drivesScsi ID Right-angle to Pcba connectorsNonshielded 68 pin Scsi device connector used on LW drives Nonshielded 80 pin Scsi SCA-2 connector, used on LC drives GND +DBP1 Charge 68Cheetah 36XL Product Manual, Rev. E Multimode signals Electrical descriptionMultimode-SE and LVD alternatives Input characteristics Output characteristicsLC drives General cable characteristicsTerminator requirements Terminator power LW drives Low voltage differential I/O circuitsDisc drive Scsi timing Drive activity remote LED signal status Cheetah 36XL Product Manual, Rev. E Technical Support Seagate Technology support services Online ServicesAutomated Services Presales SupportCustomer Service CSO USA/Canada/Latin America Support ServicesEuropean Support Services Africa/Middle East Support Services Asia/Pacific Support ServicesCall Center Toll-free Direct dial Cheetah 36XL Product Manual, Rev. E Index Symbols Cheetah 36XL Product Manual, Rev. E LED PCB System chassis Page
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