Seagate ST9450205SS SAS-2 Specification compliance, Additional information, LED drive signal

Page 80

The Ready LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +3.3 volt supply through an appropriate current limiting resistor. The LED and the current limiting resis- tor are external to the drive. See Table 19 for the output characteristics of the LED drive signals.

Table 19:

LED drive signal

 

 

 

 

 

State

 

Test condition

Output voltage

 

 

 

 

LED off, high

 

0 V ≤ VOH ≤ 3.6 V

-100 µA < IOH < 100 µA

LED on, low

 

IOL = 15 mA

0 ≤ VOL ≤ 0.225 V

12.5.2Differential signals

The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS standard.

Table 20 defines the general interface characteristics

Table 20: General interface characteristics

Characteristic

Units

1.5Gb/s

3.0Gb/s

6.0Gb/s

 

 

 

 

 

Bit rate (nominal)

Mbaud

1,500

3,000

6,000

 

 

 

 

 

Unit interval (UI)(nominal)

ps

666.6

333.3

166.6

 

 

 

 

 

Impedance (nominal, differential )

ohm

100

100

100

 

 

 

 

 

Transmitter transients, maximum

V

± 1.2

± 1.2

± 1.2

 

 

 

 

 

Receiver transients, maximum

V

± 1.2

± 1.2

± 1.2

 

 

 

 

 

12.6SAS-2 Specification compliance

Seagate SAS-2 drives are entirely compatible with the latest SAS-2 Specification (T10/1760-D) Revision 16.

The most important characteristic of the SAS-2 drive at 6Gb/s is that the receiver is capable of adapting the equalizer to optimize the receive margins. The SAS-2 drive has two types of equalizers:

1.A Decision Feedback Equalizer (DFE) which utilizes the standard SAS-2 training pattern transmitted dur- ing the SNW-3 training gap. The DFE circuit can derive an optimal equalization characteristic to compen- sate for many of the receive losses in the system.

2.A Feed Forward Equalizer (FFE) optimized to provide balanced receive margins over a range of channels bounded by the best and worst case channels as defined by the relevant ANSI standard.

12.7Additional information

Please contact your Seagate representative for SAS electrical details, if required.

For more information about the Phy, Link, Transport, and Applications layers of the SAS interface, refer to the Seagate SAS Interface Manual, part number 100293071.

For more information about the SCSI commands used by Seagate SAS drives, refer to the Seagate SCSI Commands Reference Manual, part number 100293068.

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Savvio 10K.5 SAS Product Manual, Rev. D

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Contents SED Fips 140-2 Models ST9900605SS ST9600005SS ST9450205SS ST9300405SSStandard Models Self-Encrypting Drive Models Revision history Revision Date Sheets affected or commentsContents Defect and error management InstallationAbout Fips About self-encrypting drives Interface requirementsPage Savvio 10K.5 SAS Product Manual, Rev. D List of Figures Page Seagate Technology support services Seagate Online Support and ServicesScope Standard models Standard SED models SED Fips 140-2 modelsApplicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance Electromagnetic compliance for the European UnionAustralian C-Tick Korean KCCReference documents China Restriction of Hazardous Substances RoHS DirectiveGeneral description Performance Standard featuresMedia description Factory-installed options ReliabilityFormatted capacities Programmable drive capacityPerformance characteristics Internal drive characteristicsSeek performance characteristics Access timeGeneral performance characteristics Start/stop timePrefetch/multi-segmented cache control Cache operationCaching write data Prefetch operationReliability specifications Error ratesRecoverable Errors Unrecoverable ErrorsReliability and service Seek errorsInterface errors Preventive maintenance4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact Reporting controlThermal monitor Temperature Log Page 0Dh Parameter Code DescriptionPredictive failures State of the drive prior to testing Drive Self Test DSTDST failure definition ImplementationShort and extended tests Short test Function Code 001bExtended test Function Code 010b Log page entriesProduct warranty ShippingStorage Product repair and return informationPhysical/electrical specifications PowerChoiceTM power managementPowerChoice modes Mode DescriptionAC power requirements DC power requirements900GB standard drive DC power requirements 0Gb mode Amps600GB standard drive DC power requirements 450GB standard model DC power requirements 300GB standard model DC power requirements Conducted noise immunity General DC power requirement notesPower sequencing Current profiles Current profiles for 900GB modelsCurrent profiles for 600GB models Current profiles for 450GB models Current profiles for 300GB models Power dissipation GB models in 3Gb operation900GB models in 6Gb operation GB models in 3Gb operation 600GB models in 6Gb operation 450GB models in 3Gb operation 450GB models in 6Gb operation 300GB models in 3Gb operation 300GB models in 6Gb operation Temperature a. OperatingEnvironmental limits Shock and vibration Relative humidityEffective altitude sea level a. Operating Shock Recommended mountingCorrosive environment Air cleanlinessVibration a. Operating-normal Acoustics Mechanical specifications Mounting configuration dimensionsLevel 2 security About FipsPurpose Controlled access Admin SPAbout self-encrypting drives Data encryptionRandom number generator RNG Drive lockingData bands Cryptographic eraseAuthenticated firmware download Power requirementsSupported commands RevertSPDrive error recovery procedures Defect and error managementDrive internal defects/errors SAS system errors Background Media ScanIdle Read After Write Media Pre-ScanDeferred Auto-Reallocation Setting and determining the current Type Level Protection Information PILevels of PI Identifying a Protection Information driveInstallation Physical interfaceDrive orientation CoolingDrive mounting GroundingSAS features Interface requirementsScsi commands supported Supported commandsCommand name Command code Supported Dual port supportSupported commands Supported commands Supported commands Bytes Data hex Inquiry dataSavvio inquiry data Mode Sense data Mode Sense data for 900GB drives Mode PagesMode Sense data for 600GB drives Mode Sense values for 450GB drives Mode Sense values for 300GB drives Miscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusSAS physical interface Datum B Section C C Section a a Physical characteristics Connector requirementsElectrical description Pin descriptionsSignal characteristics PowerSAS transmitters and receivers Ready LED OutSAS-2 Specification compliance LED drive signalDifferential signals General interface characteristicsIndex NumericsPage Msid Mtbf See also cooling Page Savvio 10K.5 SAS Product Manual, Rev. D Page Seagate Technology LLC

ST9600005SS, ST9600205SS, ST9300505SS, ST9300605SS, ST9300405SS specifications

Seagate has long been a prominent player in the storage solutions market, offering a range of hard drives that cater to various needs and applications. Among its extensive lineup, the Seagate ST9600105SS, ST9450405SS, ST9450305SS, ST9900605SS, and ST9900805SS stand out due to their unique features and robust performance, making them suitable for both personal and professional use.

The Seagate ST9600105SS is a 2.5-inch 600GB SAS hard drive that delivers exceptional reliability and performance. With a rotational speed of 10,000 RPM, this drive ensures quick data access through its enhanced data transfer rate. It utilizes a SAS 6Gb/s interface, allowing for fast and efficient data management in enterprise environments. The drive is designed with Seagate's AgileArray technology, which optimizes drive reliability for multi-drive environments, ensuring that users benefit from reduced downtime.

Similarly, the ST9450405SS and ST9450305SS are also 2.5-inch SAS drives, offering capacities of 450GB and 300GB, respectively. Both models feature a 10,000 RPM speed and a 6Gb/s SAS interface, making them ideal for use in data centers and business-critical applications. The ST9450405SS has enhanced power efficiency, aiding in lowering operational costs for enterprises. Both drives incorporate Seagate's advanced error recovery controls, which help maintain data integrity under varying workloads.

On the larger capacity side, the Seagate ST9900605SS and ST9900805SS drives provide even more storage options. Offering 600GB and 800GB capacities, respectively, these drives are designed for high-performance computing environments. They also spin at 10,000 RPM and support the 6Gb/s SAS interface. The ST9900805SS, in particular, is noted for its advanced performance in transactional workloads, making it suitable for database storage, virtualization, and analytics.

All five models feature Seagate’s innovative technologies, including firmware enhancements for improved error correction and reliability. They are also built to operate in a variety of environments, offering robust vibration tolerance.

In summary, the Seagate ST9600105SS, ST9450405SS, ST9450305SS, ST9900605SS, and ST9900805SS represent some of the best storage solutions for high-demand applications. With their emphasis on performance, reliability, and energy efficiency, these drives are engineered to meet the challenges of modern data storage needs, ensuring organizations can rely on them for their critical operations.
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