Seagate ST3300007LW/LC, ST3146707LW/LC, ST373207LW/LC manual Disc drive Scsi timing

Page 94

9.10Disc drive SCSI timing

Table 21: Disc drive SCSI timing

These values are not current Cheetah 10K.7 SCSI values, but are listed for information only.

 

Waveform

Waveform

 

 

Description

symbol [1]

table [1]

Typical timing

 

 

 

 

Target Select Time (no Arbitration)

T00

N/A

<1 ∝s

 

 

 

 

 

Target Select Time (with Arbitration)

T01

4.5-1,2

1.93

∝s

 

 

 

 

 

Target Select to Command

T02

4.5-1

3.77

∝s

 

 

 

 

 

Target Select to MSG Out

T03

4.5-2

1.57

∝s

 

 

 

 

 

Identify MSG to Command

T04

4.5-3

3.36

∝s

 

 

 

 

Command to Status

T05

4.5-5

Command Dependent

 

 

 

 

Command to Data (para. In)

T06

4.5-9

Command Dependent

 

 

 

 

Command to Data (para. Out)

T07

4.5-10

Command Dependent

 

 

 

 

Command to Data (Write to Data Buffer)

T08

4.5-10

Command Dependent

 

 

 

 

Command to Disconnect MSG

T09

4.5-6

Command Dependent

 

 

 

 

 

Disconnect MSG to Bus Free

T10

4.5-6,14

0.52

∝s

 

 

 

 

Disconnect to Arbitration (for Reselect)

T11

4.5-6

Command Dependent

This measures disconnected CMD overhead

 

 

 

 

 

 

 

 

 

Target win Arbitration (for Reselect)

T12

4.5-7

3.00

∝s

 

 

 

 

 

Arbitration to Reselect

T13

4.5-7

1.60

∝s

 

 

 

 

 

Reselect to Identify MSG In

T14

4.5-7

1.39

∝s

 

 

 

 

Reselect Identify MSG to Status

T15

4.5-8

Command Dependent

 

 

 

 

Reselect Identify MSG to Data (media)

T16

4.5-11

Command Dependent

 

 

 

 

Data to Status

T17

4.5-15

Command Dependent

 

 

 

 

 

Status to Command Complete MSG

T18

4.5-5,8,15

0.98

∝s

 

 

 

 

 

Command Complete MSG to Bus Free

T19

4.5-5,8,15

0.51

∝s

 

 

 

 

 

Data to Save Data Pointer MSG

T20

4.5-14

4.00

∝s

 

 

 

 

 

Save Data Pointer MSG to Disconnect MSG

T21

4.5-14

0.79

∝s

 

 

 

 

 

Command Byte Transfer

T22

4.5-4

0.04

∝s

 

 

 

 

 

Next Command Byte Access:

 

4.5-4

 

 

 

 

 

 

 

Next CDB Byte Access (Byte 2 of 6)

T23.6.2

4.5-4

0.58

∝s

 

 

 

 

 

Next CDB Byte Access (Byte 3 of 6)

T23.6.3

4.5-4

0.12

∝s

 

 

 

 

 

Next CDB Byte Access (Byte 4 of 6)

T23.6.4

4.5-4

0.12

∝s

 

 

 

 

 

Next CDB Byte Access (Byte 5 of 6)

T23.6.5

4.5-4

0.12

∝s

 

 

 

 

 

Next CDB Byte Access (Byte 6 of 6)

T23.6.6

4.5-4

0.12

∝s

 

 

 

 

 

Next CDB Byte Access (Byte 2 of 10)

T23.10.2

4.5-4

0.59

∝s

 

 

 

 

Next CDB Byte Access (Byte 3 of 10)

T23.10.3

4.5-4

0.11 ∝s ±1 ∝s

 

 

 

 

 

Next CDB Byte Access (Byte 4 of 10)

T23.10.4

4.5-4

0.12

∝s ±1 ∝s

 

 

 

 

Next CDB Byte Access (Byte 5 of 10)

T23.10.5

4.5-4

0.11 ∝s ±1 ∝s

 

 

 

 

Next CDB Byte Access (Byte 6 of 10)

T23.10.6

4.5-4

0.11 ∝s ±1 ∝s

 

 

 

 

 

Next CDB Byte Access (Byte 7 of 10)

T23.10.7

4.5-4

0.13

∝s ±1 ∝s

 

 

 

 

 

84

Cheetah 10K.7 SCSI Product Manual, Rev. D

Page 93 Page 95
Image 94
Page 93 Page 95
Contents Cheetah 10K.7 Scsi Page Cheetah 10K.7 Scsi Page Revision status summary sheet Page Contents Seagate Technology support services Defect and error managementInstallation Interface requirementsList of Figures Viii Cheetah 10K.7 Scsi Product Manual, Rev. D Scope Cheetah 10K.7 Scsi family drive ST3300007LC shownCheetah 10K.7 Scsi Product Manual, Rev. D Electromagnetic compatibility Applicable standards and reference documentationStandards Electromagnetic susceptibilityElectromagnetic compliance European Union Restriction of Hazardous Substances RoHSReference documents Cheetah 10K.7 Scsi Product Manual, Rev. D General description Standard features Media characteristicsReliability PerformanceFormatted capacities Accessories user installed Factory installed accessoriesOptions factory installed Programmable drive capacityInternal drive characteristics transparent to user Performance characteristicsScsi performance characteristics visible to user Generalized performance characteristics Access timeFormat command execution time minutes Ultra320 ScsiPrefetch/multi-segmented cache control Start/stop timeCache operation Caching write data Prefetch operation Cheetah 10K.7 Scsi Product Manual, Rev. D Recoverable Errors Reliability specificationsError rates Unrecoverable ErrorsPreventive maintenance Reliability and serviceSeek errors Annualized Failure Rate AFR4 S.M.A.R.T Controlling S.M.A.R.TDetermining rate Performance impactReporting control Predictive failuresParameter Code Description Drive Self Test DSTImplementation State of the drive prior to testingDST Failure Definition Invoking DSTExtended test Function Code 010b Product warrantyShort test Function Code 001b Log page entriesShipping Product repair and return informationAC power requirements Physical/electrical specificationsDC power requirements ST3146707 SE mode LVD mode Conducted noise immunity Power sequencing3 12 V Current profile Typical ST3300007 drive +12 V current profile Typical ST3146707 drive +12 V current profile Typical ST373207 drive +12 V current profile Power dissipation ST3300007ST3146707 ST373207 Relative humidity TemperatureEnvironmental limits Effective altitude sea levelShock and vibration ShockRecommended mounting Vibration Air cleanlinessCorrosive environment Mechanical specifications AcousticsLW mounting configuration dimensions LC mounting configuration dimensions Drive error recovery procedures Defect and error managementDrive internal defects Page Scsi systems errors Background Media Scan Media Pre-ScanDrive ID/option select header InstallationConfigure drive options FormattingJ6 jumper header J5 jumper header on LW models only J2 option select header on LW models only Function description RESDrive orientation CoolingDrive mounting GroundingCheetah 10K.7 Scsi Product Manual, Rev. D General description Interface requirementsScsi interface messages supported Scsi interface commands supported Page Page Page Inquiry Vital Product data Mode Sense data Mode Sense 10 Byte Header Data 00 ae 00 10 00 00 00 08 11 17 73 30 00 00 02 00 ae 00 10 00 00 00 08 08 8b b9 98 00 00 02 Scsi bus conditions and miscellaneous features supported Condition/feature supported bySynchronous data transfer periods supported Synchronous data transferPhysical interface 2 REQ/ACK offsetDC cable and connector PCB Scsi interface physical description Cable requirements Mating connectorsScsi interface cable requirements LC ModelsMating connectors for LW model drives Mating connectors for LC model drivesRight-angle to Pcba connectors Scsi daisy chain interface cabling for LW drives Nonshielded 68-pin Scsi device connector used on LW drives Nonshielded 80-pin Scsi SCA-2 connector, used on LC drives GND +DBP1 Charge Active LED OUT 4 REQ +REQ Active LED OUT 4 Electrical description LVD output characteristicsMultimode-SE and LVD alternatives General cable characteristics LVD input characteristicsSingle-ended drivers/receivers Cables for low voltage differential drivers/receivers LW drives Terminator requirements Terminator powerLC drives Disc drive Scsi timing Disc drive Scsi timing Spindle status Command status LED status Drive activity LEDPresales Support Seagate Technology support servicesInternet MySeagate Reseller.seagate.com Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call center Presales and Technical Support Warranty Service FAX services-All Europe toll callToll-free support numbers Asia/Pacific support services Publication feedback survey Cheetah 10K.7 Scsi Product Manual, Rev. D Symbols NumericsPage Page PCB Page Cheetah 10K.7 Scsi Product Manual, Rev. D

ST3300007LW/LC, ST373207LW/LC, ST3146707LW/LC specifications

Seagate's ST3146707LW/LC, ST373207LW/LC, and ST3300007LW/LC are part of the company's renowned line of hard disk drives (HDDs), specifically designed for enterprise and high-performance computing environments. With their reliability and performance, these drives have become popular choices for data centers and critical applications requiring extensive storage capabilities.

One of the standout features of these models is their capacity to handle large volumes of data. The ST3146707LW/LC has a capacity of 146GB, while the ST373207LW/LC offers 73GB, and the ST3300007LW/LC comes with a substantial 300GB. These capacities make them well-suited for applications that require not only high storage space but also rapid access to data.

In terms of performance, these drives utilize a 10,000 RPM spindle speed, which significantly enhances data access times and overall performance. The combination of fast rotational speeds with Seagate's advanced caching algorithms allows for swift data retrieval, making these drives ideal for environments where speed is crucial.

These HDDs also employ the SCSI (Small Computer System Interface) interface, which promises high data transfer rates and reliability in enterprise-level applications. The Ultra320 SCSI interface can support transfer rates up to 320 MB/s, ensuring that the drives can efficiently communicate with other system components.

Another key technology featured in these models is Seagate's Adaptive Error Correction technology, which enhances data integrity and reliability. This feature helps in the detection and correction of errors that can occur during data transfer, reducing the risk of data loss.

Performance consistency is critical in enterprise environments, and these drives are built to endure the demands of 24/7 operation. They are designed with robust mechanisms to withstand temperature fluctuations, shock, and vibrations commonly found in data center settings.

In summary, the Seagate ST3146707LW/LC, ST373207LW/LC, and ST3300007LW/LC hard drives exemplify advanced features and technologies tailored for enterprise storage solutions. With significant capacities, impressive spindle speeds, SCSI connectivity, and reliability-focused technologies, these drives remain a valuable asset for businesses relying on stable and high-performance data storage.
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