Product Manual Cheetah 15K.6 SAS ST3450856SS ST3450056SS (FDE) ST3300656SS ST3300056SS (FDE) ST3146356SS ST3146756SS (FDE) 100466193 Rev.
©2008, Seagate Technology LLC All rights reserved. Publication number: 100466193, Rev. B September 2008 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. . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.5 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.6 Air cleanliness . . . . . .
1.0 Scope This manual describes Seagate Technology® LLC, Cheetah® SAS (Serial Attached SCSI) disk drives. Cheetah 15K.6 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. Model Number Full Disk Encryption (FDE) ST3450856SS No ST3300656SS No ST3146356SS No ST3450056SS Yes ST3300056SS Yes ST3146756SS Yes Cheetah 15K.
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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 15K.6 drives provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers. The Serial Attached SCSI interface is designed to meet next-generation computing demands for performance, scalability, flexibility and highdensity storage requirements. Cheetah 15K.
3.1 Standard features Cheetah 15K.6 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 15K.6 drives. 4.
4.2.2 Format command execution time (minutes) When changing sector sizes, the format times shown below may need to be increased by 30 minutes. Maximum (with verify) Maximum (without verify) Note. ST3450856SS ST3450056SS ST3300656SS ST3300056SS ST3146356SS ST3146756SS 176 144 100 88 72 50 There is no significant difference in the format time between FDE and non-FDE models of the same capacity.
If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive.
Note. 4.5.1 The size of each segment is not reported by Mode Sense command page 08h, bytes 14 and 15. The value 0XFFFF is always reported regardless of the actual size of the segment. Sending a size specification using the Mode Select command (bytes 14 and 15) does not set up a new segment size. If the STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt to change an unchangeable parameter.
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.
can 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 11: Temperature Log Page (0Dh) Parameter Code Description 0000h Primary Temperature 0001h Reference Temperature 5.2.
A Drive Not Ready condition is reported by the drive under the following conditions: • Motor will not spin • Motor will not lock to speed • Servo will not lock on track • Drive cannot read configuration tables from the disk In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code. 5.2.6.2.
The drive will report the failure condition and LBA (if applicable) in the Self-test Results Log parameter. The Sense key, ASC, ASCQ, and FRU are used to report the failure condition. 5.2.6.2.5 Abort There are several ways to abort a diagnostic. You can use a SCSI Bus Reset or a Bus Device Reset message to abort the diagnostic. You can abort a DST executing in background mode by using the abort code in the DST Function Code field.
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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 12: ST3450856SS DC power requirements ST3450856SS 1.
Table 13: ST3450056SS (FDE) DC power requirements Notes Voltage ST3450056SS (FDE) 1.5 Gbit mode ST3450056SS (FDE) 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] 0.45 0.77 0.48 0.77 Maximum starting current (peak DC) DC 3σ [3] 0.67 1.96 0.74 1.96 (peak AC) AC 3σ [3] 0.97 4.57 0.84 4.40 [1] [4] 0.60 0.04 0.63 0.
Table 15: ST3300056SS (FDE) DC power requirements Notes Voltage ST3300056SS (FDE) 1.5 Gbit mode ST3300056SS (FDE) 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] 0.48 0.66 0.50 0.66 Maximum starting current (peak DC) DC 3σ [3] 0.67 1.78 0.69 1.78 (peak AC) AC 3σ [3] 0.82 4.02 0.88 4.06 [1] [4] 0.60 0.04 0.63 0.04 [1][6] 0.59 1.09 0.62 1.09 [1] 0.60 1.13 0.62 1.12 1.
Table 17: ST3146756SS (FDE) DC power requirements Notes Voltage ST3146756SS (FDE) 1.5 Gbit mode ST3146756SS (FDE) 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] 0.49 0.55 0.51 0.55 Maximum starting current (peak DC) DC 3σ [3] 0.66 1.81 0.69 1.82 (peak AC) AC 3σ [3] 0.86 4.24 0.90 4.28 [1] [4] 0.60 0.04 0.63 0.04 [1][6] 0.58 0.96 0.60 0.96 [1] 0.59 0.97 0.62 0.97 1.
6.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector. +5V = +12V = 6.2.2 250 mV pp from 0 to 100 kHz to 20 MHz. 800 mV pp from 100 Hz to 8 KHz. 450 mV pp from 8 KHz to 20 KHz. 250 mV pp from 20 KHz to 5 MHz. Power sequencing The drive does not require power sequencing.
Figure 1. Typical 450GB current profiles Figure 2. Typical 300GB current profiles 28 Cheetah 15K.6 SAS Product Manual, Rev.
Figure 3. Typical 146GB current profiles Cheetah 15K.6 SAS Product Manual, Rev.
6.3 Power dissipation ST3450856SS model Typical power dissipation under idle conditions in 3Gb operation is 11.85 watts (40.44 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). 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. Figure 4.
ST3450056SS (FDE) model Typical power dissipation under idle conditions in 3Gb operation is 11.64 watts (39.72 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). 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. Figure 5.
ST3300656SS model Typical power dissipation under idle conditions in 3Gb operation is 10.26 watts (35.01 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). 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. Figure 6.
ST3300056SS (FDE) model Typical power dissipation under idle conditions in 3Gb operation is 10.42 watts (35.56 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). 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. Figure 7.
ST3146356SS model Typical power dissipation under idle conditions in 3Gb operation is 9.06 watts (30.92 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). 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. Figure 8.
ST3146756SS (FDE) model in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 9.15 watts (31.22 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). 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. Figure 9.
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 <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) Packaged/product weight Drop height 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 18 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 15K.6 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.
If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 13. The air-flow patterns are created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air-flow patterns are acceptable as long as the temperature measurement guidelines of Section 6.4.1 are met. Above unit Note. Air flows in the direction shown (back to front) or in reverse direction (front to back) Under unit Above unit Note.
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 15K.6 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 15K.6 drives. 9.1.1 task management functions Table 19 lists the SAS task management functions supported.
9.2 Dual port support Cheetah 15K.6 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 21 lists the SCSI commands supported by Cheetah 15K.6 drives. Table 21: Commands supported by Cheetah 15K.
Table 21: Commands supported by Cheetah 15K.
Table 21: Commands supported by Cheetah 15K.
Table 21: 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] 56 Cheetah 15K.6 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 22 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual.
9.3.2 Mode Sense data The Mode Sense command provides a way for the drive to report its operating parameters to the initiator. The drive maintains four sets of mode parameters: 1. Default values Default values are hard-coded in the drive firmware stored in flash E-PROM (nonvolatile memory) on the drive’s PCB. These default values can be changed only by downloading a complete set of new firmware into the flash E-PROM.
9.3.2.
9.3.2.
9.3.2.
9.4 Miscellaneous operating features and conditions Table 23 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.
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 14. 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 15. 64 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 16. 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 25: 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 17. The receiver is AC coupling to eliminate ground shift noise. .01 TX RX Differential Transfer Medium Transmitter 100 TY Figure 17. 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 27 for the output characteristics of the LED drive signals. Table 27: 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 18 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 18.
The leading and trailing edge slopes of figure 18 shall be preserved.
9.5.2.2 Transmitter signal characteristics Table 29 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 29 specifies the signal characteristics.
9.5.2.3 Receiver signal characteristics Table 30 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 21 and figure 22. Table 30: Receiver signal characteristics Signal characteristic Units 1.5 Gbps 3.0 Gbps N/A See table 31 See table 31 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 32 defines the amount of jitter the receiver shall tolerate . Table 32: Receiver jitter tolerance 1.5 Gbpsa 3.0 Gbpsa Sinusoidal jitterb,c Deterministic jittere,f,h 0.10 Total jitterh 0.35 Sinusoidal jitterb,d 0.65 Deterministic jittere,g,h 0.10 Total jitterh 0.35 0.65 a Units are in UI.
Table 33: 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 22 shows the zero-length test load. 50 ohm 10 nF Tx+ Probe points 50 ohm 10 nF Tx- SAS internal connector Figure 22. Zero-length test load Figure 23 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 23. Frequency (GHz) 3.0 ISI loss example at 3.0 Gbps Figure 24 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 33. 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 30.
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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 67 5 volt pins 67 A abort task set function 51 AC coupling 67 AC power requirements 23 ACA active status 62 ACA active, faulted initiator status 62 acoustics 39 active LED Out signal 67 actuator assembly design 7 adaptive caching 62 AFR 9 air cleanliness 39 air flow 47, 48 illustrated 48 air inlet 47 altitude 37 ambient 36 ambient temperature 47 ANSI documents SCSI 5 Serial Attached SCSI 5 asynchronous event notification 62 audible noise 3 auto write and read reallocation progra
environmental control 39 error management 43 rates 15 errors 43 F FCC rules and regulations 3 features 8 interface 51 firmware 8 corruption 56 flawed sector reallocation 8 Format command execution time 12 function complete, code 00 51 not supported, code 05 51 reject, code 04 51 G Good status 62 gradient 36, 37 ground shift noise 67 grounding 49 H HDA 47, 49 head and disc assembly.
non-operating 37, 39 temperature 36 non-operating vibration 39 O office environment 39 operating 37, 39 option selection 66 out-of-plane distortion 49 P package size 38 package test specification 5 packaged 38 parameter rounding 62 PCBA 49 peak bits per inch 11 peak operating current 23, 24, 25, 26 peak-to-peak measurements 27 performance characteristics detailed 11 general 12 performance degradation 37 performance highlights 8 physical damage 39 physical dimensions 40 physical interface 62 physical speci
T task management functions 51 Abort task set 51 Clear ACA 51 Clear task set 51 terminate task 51 task management response codes 51 Function complete 00 51 Function not supported 05 51 Function reject 04 51 task set full status 62 technical support services 79 temperature 36, 47 limits 36 non-operating 36 regulation 3 See also cooling terminate task function 51 terminators 47 tracks per inch 11 transmitters 67 transporting the drive 21 U unformatted 9 Unrecoverable Errors 15 unrecovered media data 15 V vi
Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 100466193, Rev.