Product Manual Cheetah 15K.6 SAS ST3450856SS ST3300656SS ST3146356SS 100466193 Rev.
©2007, Seagate Technology LLC All rights reserved. Publication number: 100466193, Rev. A October 2007 Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Cheetah, SeaTools and SeaTDD are either trademarks or registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States and/ or other countries.
Contents 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Standards, compliance and reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.1 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.5 Acoustics . . . . . . . . . .
List of Figures Figure 1. Cheetah 15K.6 SAS disk drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Figure 2. Typical ST3450856SS current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Figure 3. Typical ST3300656SS current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 Figure 4.
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1.0 Scope This manual describes Seagate Technology® LLC, Cheetah® SAS (Serial Attached SCSI) disk drives. Cheetah drives support the SAS Protocol specifications to the extent described in this manual. The SAS Interface Manual (part number 100293071) describes the general SAS characteristics of Cheetah 15K.6 and other Seagate SAS drives. Figure 1. Cheetah 15K.6 SAS disk drive Cheetah 15K.6 SAS Product Manual, Rev.
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2.0 Standards, compliance and reference documents The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends on its host equipment to provide adequate power and environment for optimum performance and compliance with applicable industry and governmental regulations. Special attention must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regulation.
2.2 Compliance 2.2.1 Electromagnetic compliance Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking and C-Tick Marking. The drive was tested in a representative system for typical applications. The selected system represents the most popular characteristics for test platforms.
Seagate also has internal systems in place to ensure ongoing compliance with the RoHS Directive and all laws and regulations which restrict chemical content in electronic products. These systems include standard operating procedures that ensure that restricted substances are not utilized in our manufacturing operations, laboratory analytical validation testing, and an internal auditing process to ensure that all standard operating procedures are complied with. 2.
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3.0 General description Cheetah drives combine perpendicular recording, giant magnetoresistive (GMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a Serial Attached SCSI (SAS) interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.
3.1 Standard features Cheetah drives have the following standard features: • • • • • • • • • • • • • • • • • • • • • • • • • • 1.5 / 3 Gbit Serial Attached SCSI (SAS) interface Integrated dual port SAS controller supporting the SCSI protocol Support for SAS expanders and fanout adapters Firmware downloadable using the SAS interface 128 - deep task set (queue) Supports up to 32 initiators Jumperless configuration.
3.4 Reliability • 1,600,000 hour MTBF (Annualized Failure Rate (AFR) of 0.55%) • Incorporates industry-standard Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.) • 5-year warranty 3.5 Formatted capacities Standard OEM models are formatted to 512 bytes per block. The block size is selectable at format time and must be one of the supported sizes listed in the table below.
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4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Cheetah drives. 4.1 Internal drive characteristics Drive capacity Read/write data heads Tracks per inch Peak bits per inch Areal Density Internal data rate disk rotation speed Avg rotational latency ST3450856SS 450 8 150,000 1,100 165 1.95 15k 2.0 ST3300656SS 300 6 150,000 1,100 165 1.95 15k 2.0 ST3146356SS 146 3 150,000 1,100 165 1.95 15k 2.
4.2.2 Format command execution time (minutes) Maximum (with verify) Maximum (without verify) ST3450856SS ST3300656SS ST3146356SS 176 144 100 88 72 50 Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect). 4.2.
The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 30 seconds (maximum) from removal of DC power. There is no power control switch on the drive. 4.4 Prefetch/multi-segmented cache control The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in cache operations.
4.5.1 Caching write data Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored while the drive performs the Write command. If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made available for future read cache hits. The same buffer space and segmentation is used as set up for read functions.
5.0 Reliability specifications The following reliability specifications assume correct host and drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints. Seek error rate: Read Error Rates Recovered Data Unrecovered Data Miscorrected Data Interface error rate: MTBF AFR Preventive maintenance: 5.
5.1.3 Seek errors A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails, a seek positioning error (Error code = 15h or 02h) will be reported with a Hardware error (04h) in the Sense Key. Recoverable seek errors are specified at Less than 10 errors in 108 seeks.
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 failures.
Reporting control Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). Subject to the reporting method, the firmware will issue to the host an 01-5Dxx sense code. The error code is preserved through bus resets and power cycles. Determining rate S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded errors increases to an unacceptable level.
be used to set this trip point. The default value for this drive is 68°C, however, you can set it to any value in the range of 0 to 68°C. If you specify a temperature greater than 68°C in this field, the temperature is rounded down to 68°C. A sense code is sent to the host to indicate the rounding of the parameter field. Table 1: Temperature Log Page (0Dh) Parameter Code Description 0000h Primary Temperature 0001h Reference Temperature 5.2.
5.2.6.2.1 State of the drive prior to testing The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons why a drive may not be ready, some of which are valid conditions, and not errors. For example, a drive may be in process of doing a format, or another DST. It is the responsibility of the host application to determine the “not ready” cause.
2. The Self-Test Results Value field is set to Fh 3. The drive will store the log page to non-volatile memory After a self-test is complete or has been aborted, the drive updates the Self-Test Results Value field in its SelfTest Results Log page in non-volatile memory. The host may use Log Sense to read the results from up to the last 20 self-tests performed by the drive. The self-test results value is a 4-bit field that reports the results of the test.
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6.0 Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the drive. 6.1 AC power requirements None. 6.2 DC power requirements The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector. Table 2: ST3450856SS DC power requirements ST3450856SS 1.
Table 3: ST3300656SS DC power requirements ST3300656SS 1.5 Gbit mode Notes Voltage ST3300656SS 3 Gbit mode (Amps) (Amps) (Amps) (Amps) +5V +12V [2] +5V +12V [2] Regulation [5] ±5% ±5% [2] ±5% ±5% [2] Avg idle current DCX [1] [7] 0.56 0.66 0.58 0.69 Maximum starting current (peak DC) DC 3σ [3] 0.74 1.78 0.90 1.80 (peak AC) AC 3σ [3] 0.86 4.00 1.14 4.31 [1] [4] 0.56 0.03 0.62 0.03 [1][6] 0.60 1.05 0.63 1.07 [1] 0.61 1.07 0.64 1.09 1.12 2.64 1.40 2.
[3] [4] [5] [6] [7] 15,000 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator. See +12V current profile in Figure 2. This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive. See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response.
Figure 2. 26 Typical ST3450856SS current profiles Cheetah 15K.6 SAS Product Manual, Rev.
Figure 3. Typical ST3300656SS current profiles Cheetah 15K.6 SAS Product Manual, Rev.
Figure 4. 28 Typical ST3146356SS current profiles Cheetah 15K.6 SAS Product Manual, Rev.
6.3 Power dissipation ST3450856SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 12.67 watts (43.23 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
ST3300656SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 11.19 watts (38.15 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
ST3146356SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 9.59 watts (32.72 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
6.4 Environmental limits Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F (14.8°C). Maximum wet bulb temperature is 82°F (28°C). 6.4.1 Temperature a. Operating The maximum allowable continuous or sustained HDA case temperature for the rated Annualized Failure Rate (AFR) is 122°F (50°C) The maximum allowable HDA case temperature is 60°C.
6.4.2 Relative humidity The values below assume that no condensation on the drive occurs. a. Operating 5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour. b. Non-operating 5% to 95% non-condensing relative humidity. 6.4.3 Effective altitude (sea level) a. Operating –1,000 to +10,000 feet (–305 to +3,048 meters) b. Non-operating –1,000 to +40,000 feet (–305 to +12,210 meters) 6.4.
d. Packaged disk drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as defined in the table below. For additional details refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg). Package size Packaged/product weight Drop height <600 cu in (<9,800 cu cm) 600-1800 cu in (9,800-19,700 cu cm) >1800 cu in (>19,700 cu cm) >600 cu in (>9,800 cu cm) Any 0-20 lb (0 to 9.1 kg) 0-20 lb (0 to 9.1 kg) 20-40 lb (9.
6.4.4.2 Vibration a. Operating—normal The drive as installed for normal operation, shall comply with the complete specified performance while subjected to continuous vibration not exceeding 10–500 Hz @ 0.5 G (zero to peak) Vibration may be applied in the X, Y, or Z axis. Operating normal translational random flat profile 10–500 Hz 0.4 gRMS b.
Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corrosive chemicals as electronic drive component reliability can be affected by the installation environment. The silver, copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide, chloride, and nitrate contaminants. Sulfur is found to be the most damaging.
26.11 MAX (1.028 MAX) 2X 20.14 (2X .793) 6.35 (.250) 24.00 (.945) 4.22 X 90 ( .166 X 90 ) 2X 28.45 (2X 1.120) 2X 70.05 (2X 2.758) 0.36 ( .014) 122.00 (4.803) UNITS OF MEASURE: mm (inches) 2X 130.05 (2X 5.120) 146.99 MAX (5.787 MAX) 131.17 (5.164) 85.60 (3.370) 41.15 (1.620) 20.14 (.793) 2X 29.21 (2X 1.150) 4.57 MIN BLIND ( .18 MIN BLIND) 4.22 X 90 ( .166 X 90 ) 0.36 ( .014) 1.45 (.057) 50.80 (2.000) DRIVE CENTER 3.17 (.125) 101.60 +/- .25 (4.000 +/- .010) LINE 2X 100.13 (2X 3.942) 20.
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7.0 Defect and error management Seagate continues to use innovative technologies to manage defects and errors. These technologies are designed to increase data integrity, perform drive self-maintenance, and validate proper drive operation. SCSI defect and error management involves drive internal defect/error management and SAS system error considerations (errors in communications between the initiator and the drive).
The drive firmware error recovery algorithms consists of 13 levels for read recoveries and five levels for write. Each level may consist of multiple steps, where a step is defined as a recovery function involving a single reread or re-write attempt. The maximum level used by the drive in LBA recovery is determined by the read and write retry counts. Table 5 equates the read and write retry count with the maximum possible recovery time for read and write recovery of individual LBAs.
7.3 SAS system errors Information on the reporting of operational errors or faults across the interface is given in the SAS Interface Manual. The SSP Response returns information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results reports the results of diagnostic operations performed by the drive. Status returned by the drive to the initiator is described in the SAS Interface Manual.
7.6 Deferred Auto-Reallocation Deferred Auto-Reallocation (DAR) simplifies reallocation algorithms at the system level by allowing the drive to reallocate unreadable locations on a subsequent write command. Sites are marked for DAR during read operations performed by the drive. When a write command is received for an LBA marked for DAR, the auto-reallocation process is invoked and attempts to rewrite the data to the original location.
8.0 Installation Cheetah disk drive installation is a plug-and-play process. There are no jumpers, switches, or terminators on the drive. SAS drives are designed to be used in a host system that provides a SAS-compatible backplane with bays designed to accommodate the drive. In such systems, the host system typically provides a carrier or tray into which you need to mount the drive. Mount the drive to the carrier or tray provided by the host system using four 6-32 UNC screws.
8.2 Cooling Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will not exceed temperature conditions specified in Section 6.4.1, "Temperature." The rack, cabinet, or drawer environment for the drive must provide heat removal from the electronics and head and disk assembly (HDA). You should confirm that adequate heat removal is provided using the temperature measurement guidelines described in Section 6.4.1.
8.3 Drive mounting Mount the drive using the bottom or side mounting holes. If you mount the drive using the bottom holes, ensure that you do not physically distort the drive by attempting to mount it on a stiff, non-flat surface. The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm).
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9.0 Interface requirements This section partially describes the interface requirements as implemented on Cheetah drives. Additional information is provided in the SAS Interface Manual (part number 100293071). 9.1 SAS features This section lists the SAS-specific features supported by Cheetah drives. 9.1.1 task management functions Table 6 lists the SAS task management functions supported.
9.2 Dual port support Cheetah SAS drives have two independent ports. These ports may be connected in the same or different SCSI domains. Each drive port has a unique SAS address. The two ports run at the same link rate. The first port to successfully complete speed negotiation sets the link rate support by both ports. When the second port participates in speed negotiation, it indicates the only supported speed is the speed selected by the first port.
9.3 SCSI commands supported Table 8 lists the SCSI commands supported by Cheetah drives. Table 8: Commands supported by Cheetah 15K.
Table 8: Commands supported by Cheetah 15K.
Table 8: Commands supported by Cheetah 15K.
Table 8: Commands supported by Cheetah 15K.6 SAS family drives (continued) Command name Command code FUA bit Supported Y Write Long 3Fh Y Write Same 41h Y PBdata N LBdata N XDRead 52h N XDWrite 50h N XPWrite 51h N [1] [2] [3] [4] 52 Cheetah drives can format to 512, 520, 524, or 528 bytes per logical block. Warning. Power loss during flash programming can result in firmware corruption. This usually makes the drive inoperable.
9.3.1 Inquiry data Table 9 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual.
Select command before the drive achieves operating speed and is “ready.” An attempt to do so results in a “Check Condition” status. On drives requiring unique saved values, the required unique saved values are stored into the saved values storage location on the media prior to shipping the drive. Some drives may have unique firmware with unique default values also.
9.3.2.
9.3.2.
9.3.2.
9.4 Miscellaneous operating features and conditions Table 10 lists various features and conditions. A “Y” in the support column indicates the feature or condition is supported. An “N” in the support column indicates the feature or condition is not supported.
9.4.1 SAS physical interface Figure 13 shows the location of the SAS device connector J1. Figures 14 and 15 provide the dimensions of the SAS device. Details of the physical, electrical, and logical characteristics are provided within this section. The operational aspects of Seagate’s SAS drives are provided in the SAS Interface Manual.. SAS Interface connector Figure 13. Physical interface Cheetah 15K.6 SAS Product Manual, Rev.
0.80 (6X) 5.92 7.62 4.65 0.52 2.00 (3X) 0.45 5.08 0.08 x 45 0.03 (7X) 0.10 M E 42.73 REF. 41.13 0.30 0.15 0.20 B 0.05 (2X) C A B 4.00 1.10 0.08 0.15 D 0.30 CL OF DATUM D 0.05 (4X) A B R0.30 C 0.08 (4X) SEE Detail1 33.43 0.05 B 15.875 15.875 1.27 (14X) 1.27 (6X) 0.84 5.08 0.05 (22X) 0.15 B 4.90 0.08 0.35MIN P15 P1 S7 S1 CL OF DATUM B Figure 14. 60 SAS connector dimensions Cheetah 15K.6 SAS Product Manual, Rev.
Detail A 6.10 S14 2.25 S8 0.30 0.05 0.40 4.85 0.05 x 45 (5X) 0.05 0.10 B 0.05 X 45 (3X) CORING ALLOWED IN THIS AREA. E 4.40 0.15 R0.30 0.08 SEE Detail 2 C 1.95 0.08 A 45 0.35 3.90 0.05 0.15 SECTION C - C SECTION A - A 0.08 0.05 CONTACT SURFACE FLUSH TO DATUM A 0.03 65 1.23 0.05 0.08 1.90 0.08 30 0.05 Detail 2 2.40 0.08 0.10 A SECTION B - B D Figure 15. SAS connector dimensions 9.4.2 Physical characteristics This section defines physical interface connector. 9.4.
9.4.4 Electrical description SAS drives use the device connector for: • DC power • SAS interface • Activity LED This connector is designed to either plug directly into a backpanel or accept cables. 9.4.5 Pin descriptions This section provides a pin-out of the SAS device and a description of the functions provided by the pins. Table 12: SAS pin descriptions Pin Signal name S1 Port A Ground S2* +Port A_in S3* Signal type Pin Signal name P1* NC (reserved 3.3Volts) P2* NC (reserved 3.
9.4.6 SAS transmitters and receivers A typical SAS differential copper transmitter and receiver pair is shown in Figure 16. The receiver is AC coupling to eliminate ground shift noise. .01 TX RX Differential Transfer Medium Transmitter 100 TY Figure 16. SAS transmitters and receivers 9.4.7 Power Receiver 100 RY .01 The drive receives power (+5 volts and +12 volts) through the SAS device connector. Three +12 volt pins provide power to the drive, 2 short and 1 long.
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 resistor are external to the drive. See Table 14 for the output characteristics of the LED drive signals. Table 14: 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 9.5.
9.5.2.1.2 Receive eye mask Figure 17 describes the receive eye mask. This eye mask applies to jitter after the application of a single pole high-pass frequency-weighting function that progressively attenuates jitter at 20 dB/decade below a frequency of ((bit rate) / 1.667). Absolute amplitude (in V) Z2 Z1 0V -Z1 -Z2 0 X1 X2 1-X1 1-X2 1 Normalized time (in UI) Figure 17.
The leading and trailing edge slopes of figure 17 shall be preserved.
9.5.2.2 Transmitter signal characteristics Table 16 specifies the signal requirements at the transmitter end of a TxRx connection as measured into the zero-length test load. All specifications are based on differential measurements. The OOB sequence is performed at signal voltage levels corresponding to the lowest supported transfer rate. Table 16 specifies the signal characteristics. Table 16: Transmitter signal characteristics Signal characteristica Units 1.5 Gbps 3.
9.5.2.3 Receiver signal characteristics Table 17 defines the compliance point requirements of the signal at the receiver end of a TxRx connection as measured into the test loads specified in figure 20 and figure 21. Table 17: Receiver signal characteristics Signal characteristic Units 1.5 Gbps 3.0 Gbps N/A See table 18 See table 18 2 x Z2 mV(P-P) 1,200 1,600 2 x Z1 mV(P-P) 325 275 X1a UI 0.275 0.275 X2 UI 0.50 0.50 Skewd ps 80 75 mV(P-P) 2.000 2.
9.5.2.3.2 Receiver jitter tolerance Table 19 defines the amount of jitter the receiver shall tolerate . Table 19: Receiver jitter tolerance 1.5 Gbpsa 3.0 Gbpsa Sinusoidal jitterb,c Deterministic jittere,f,h Total jitterh Sinusoidal jitterb,d Deterministic jittere,g,h Total jitterh 0.10 0.35 0.65 0.10 0.35 0.65 a Units are in UI.
Table 20: Impedance requirements (Sheet 2 of 2) Requirement Common mode impedance b,e Units 1.5 Gbps 3.0 Gbps ohm 20 min/40 max 20 min/40 max ohm 60 min/115 max 60 min/115 max ohm 5 5 ohm 15 min/40 max 15 min/40 max Transmitter source termination Differential impedanceb Differential impedance Common mode imbalanceb,g impedanceb a All times indicated for time domain reflectometer measurements are recorded times.
A combination of a zero-length test load and the transmitter compliance transfer function (TCTF) test load methodology is used for the specification of transmitter characteristics. This methodology specifies the transmitter signal at the test points on the required test loads. The transmitter uses the same settings (e.g., preemphasis, voltage swing) with both the zero-length test load and the TCTF test load. The signal specifications at IR are met under each of these loading conditions.
Figure 21 shows the zero-length test load. 50 ohm 10 nF Tx+ Probe points 50 ohm 10 nF Tx- SAS internal connector Figure 21. Zero-length test load Figure 22 shows an ISI loss example at 3.0 Gbps. S21 (dB) Compliance interconnect magnitude response and ISI loss example for 3.0 Gbps 0 ISI loss > 3.9 dB -10.9 dB Sample compliance interconnect 0.3 1.5 Figure 22. Frequency (GHz) 3.0 ISI loss example at 3.0 Gbps Figure 23 shows an ISI loss example at 1.5 Gbps.
9.5.2.5 Receiver characteristics The drive receiver is A.C. coupled. The receive network terminates the TxRx connection by a 100 ohm equivalent impedance as specified in table 20. The receiver operates within a BER of 10-12 when a SAS signal with valid voltage and timing characteristics is delivered to the compliance point from a 100 ohm source. The received SAS signal are considered valid if it meets the voltage and timing limits specified in table 17.
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10.0 Seagate Technology support services Internet For information regarding Seagate products and services, visit www.seagate.com. Worldwide support is available 24 hours daily by email for your questions. Presales Support: Presales@Seagate.com Technical Support: DiscSupport@Seagate.com Warranty Support: http://www.seagate.com/support/service/index.html mySeagate my.seagate.com is the industry's first Web portal designed specifically for OEMs and distributors.
Customer Service Operations Warranty Service Seagate offers worldwide customer support for Seagate products. Seagate distributors, OEMs and other direct customers should contact their Seagate Customer Service Operations (CSO) representative for warrantyrelated issues. Resellers or end users of drive products should contact their place of purchase or Seagate warranty service for assistance. Have your serial number and model or part number available.
Index Numerics 12 volt pins 63 5 volt pins 63 A abort task set function 47 AC coupling 63 AC power requirements 23 ACA active status 58 ACA active, faulted initiator status 58 acoustics 35 active LED Out signal 63 actuator assembly design 7 adaptive caching 58 AFR 9 air cleanliness 35 air flow 44 illustrated 44 air inlet 44 altitude 33 ambient 32 ambient temperature 44 ANSI documents SCSI 5 Serial Attached SCSI 5 asynchronous event notification 58 audible noise 3 auto write and read reallocation programmab
environmental control 35 error management 39 rates 15 errors 39 F FCC rules and regulations 3 features 8 interface 47 firmware 8 corruption 52 flawed sector reallocation 8 Format command execution time 12 function complete, code 00 47 not supported, code 05 47 reject, code 04 47 G Good status 58 gradient 32, 33 ground shift noise 63 grounding 45 H HDA 44, 45 head and disc assembly (HDA) 7 head and disc assembly.
noise immunity 25 non-operating 33, 35 temperature 32 non-operating vibration 35 O office environment 35 operating 33, 35 option selection 62 out-of-plane distortion 45 P package size 34 package test specification 5 packaged 34 parameter rounding 58 PCBA 45 peak bits per inch 11 peak operating current 23, 24 peak-to-peak measurements 25 performance characteristics detailed 11 general 12 performance degradation 33 performance highlights 8 physical damage 35 physical dimensions 36 physical interface 59 phys
T task management functions 47 Abort task set 47 Clear ACA 47 Clear task set 47 terminate task 47 task management response codes 47 Function complete 00 47 Function not supported 05 47 Function reject 04 47 task set full status 58 technical support services 75 temperature 32, 44 limits 32 non-operating 32 regulation 3 See also cooling terminate task function 47 terminators 43 tracks per inch 11 transmitters 63 transporting the drive 21 U unformatted 9 Unrecoverable Errors 15 unrecovered media data 15 V vi
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