Product Manual Savvio 15K SAS ® ST973451SS ST936751SS 100407739 Rev.
©2007, Seagate Technology LLC All rights reserved. Publication number: 100407739, Rev. C August 2007 Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Savvio, 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 Applicable standards and reference documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.6 Corrosive environment . . . .
List of Figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Typical ST973451SS current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typical ST936751SS current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.0 Scope This manual describes Seagate Technology® LLC, Savvio® 15K SAS (Serial Attached SCSI) disc drives. Savvio drives support the SAS Protocol to the extent described in this manual. The SAS Interface Manual (part number 100293071) and SCSI Commands Reference Manual (part number 100293068) describe the general SAS characteristics of these and other Seagate SAS drives. Savvio 15K SAS Product Manual, Rev.
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2.0 Applicable standards and reference documentation 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.
2.1.2 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. The system configurations include: • • • • • • • Typical current use microprocessor 3.
2.1.3 European Union Restriction of Hazardous Substances (RoHS) The European Union Restriction of Hazardous Substances (RoHS) Directive restricts the presence of chemical substances, including Lead (Pb), in electronic products effective July 2006. A number of parts and materials in Seagate products are procured from external suppliers. We rely on the representations of our suppliers regarding the presence of RoHS substances in these parts and materials.
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3.0 General description Savvio drives combine Tunneling Magnetoresistive (TMR) heads 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. The Serial Attached SCSI interface is designed to meet next-generation computing demands for performance, scalability, flexibility and high-density storage requirements.
3.1 Standard features Savvio drives have the following standard features: • Perpendicular recording technology • 1.
3.4 • • • • Reliability Annualized Failure Rate (AFR) of 0.55% Mean Time Between Failures (MTBF) of 1,600,000 hours 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 a multiple of 4 bytes.
3.8 Options You may order the following items which are incorporated at the manufacturing facility during production or packaged before shipping. Some of the options available are (not an exhaustive list of possible options): • Other capacities can be ordered depending on sparing scheme and sector size requested. • Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection against transit damage.
4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Savvio drives. 4.1 Internal drive characteristics Drive capacity Read/write data heads Tracks per surface (total) Tracks per inch Peak bits per inch Areal density Internal data rate Disc rotation speed Avg rotational latency 4.2 ST973451SS 73.4 4 42,554 150 861.81 130.58 957.51 to 1,282.08 15k 2 ST936751SS 36.7 2 42,554 150 861.81 130.58 957.51 to 1,282.
4.2.2 Format command execution time ST973451SS ST936751SS Maximum (with verify) 52 minutes 26 minutes Maximum (without verify) 35 minutes 18 minutes 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.
All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Table 9. 4.5 Note. Cache operation Refer to the SAS Interface Manual for more detail concerning the cache bits. Of the 16 Mbytes physical buffer space in the drive, approximately 13,000 kbytes can be used as a cache. The buffer is divided into logical segments from which data is read and to which data is written.
If write caching is enabled (WCE=1), then the drive may return Good status on a write command after the data has been transferred into the cache, but before the data has been written to the medium. If an error occurs while writing the data to the medium, and Good status has already been returned, a deferred error will be generated. The Synchronize Cache command may be used to force the drive to write all cached write data to the medium.
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 Rates1 Recovered Data Unrecovered Data Miscorrected Data Interface error rate: Mean Time Between Failure (MTBF): Annualized Failure Rate (AFR) Preventive maintenance: 1.
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.
Caution. 5.2.4 The drive motor must come to a complete stop prior to changing the plane of operation. This time is required to insure data integrity. 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.
S.M.A.R.T. measures error rates. All errors for each monitored attribute are recorded. A counter keeps track of the number of errors for the current interval. This counter is referred to as the Failure Counter. Error rate is the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to set thresholds for the number of errors and their interval. If the number of errors exceeds the threshold before the interval expires, the error rate is considered to be unacceptable.
There are two test coverage options implemented in DST: 1. Extended test 2. Short text The most thorough option is the extended test that performs various tests on the drive and scans every logical block address (LBA) of the drive. The short test is time-restricted and limited in length—it does not scan the entire media surface, but does some fundamental tests and scans portions of the media. If DST encounters an error during either of these tests, it reports a fault condition.
2. extended These testing options are described in the following two subsections. Each test consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan segment. Short test (Function Code: 001b) The purpose of the short test is to provide a time-limited test that tests as much of the drive as possible within 120 seconds. The short test does not scan the entire media surface, but does some fundamental tests and scans portions of the media.
ble specifications will be repaired or replaced, at Seagate’s option and at no charge to the customer, if returned by customer at customer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty procedure. Seagate will pay for transporting the repair or replacement item to the customer. For more detailed warranty information, refer to the standard terms and conditions of purchase for Seagate products on your purchase documentation.
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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: ST973451SS DC power requirements ST973451SS 1.5 Gbit mode Notes Voltage ST973451SS 3.
Table 3: ST936751SS DC power requirements ST936751SS 1.5 Gbit mode Notes Voltage ST936751SS 3.0 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] [6] 0.77 0.16 0.74 0.16 Maximum starting current (peak DC) DC 3σ [3] 0.85 1.33 0.81 1.28 (peak AC) AC 3σ [3] 1.27 1.87 1.11 1.87 3σ [1] [4] 0.63 0.03 0.67 0.03 [1] 0.75 0.34 0.78 0.34 [1] 0.78 0.38 0.81 0.37 1.46 1.14 1.52 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 = 250 mV pp from 0 to 100 kHz to 20 MHz. +12V = 800 mV pp from 100 0Hz to 8 KHz. 450 mV pp from 8 KHz to 20 KHz. 250 mV pp from 20 KHz to 5 MHz. 6.2.2 Power sequencing The drive does not require power sequencing.
Figure 2. 26 Typical ST936751SS current profile Savvio 15K SAS Product Manual, Rev.
6.3 Power dissipation ST973451SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 5.93 watts (20.23 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3). 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.
ST936751SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 5.62 watts (19.18 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3). 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.
6.4.3 Effective altitude (sea level) a. Operating –200 to +10,000 feet (–60.96 to +3,048 meters) b. Non-operating –200 to +40,000 feet (–60.96 to +12,210 meters) 6.4.4 Shock and vibration Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is installed in an enclosure to which the stated shock and/or vibration criteria is applied, resonances may occur internally to the enclosure resulting in drive movement in excess of the stated limits.
d. Packaged Disc 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 @ 1.0 G (zero to peak) Vibration may be applied in the X, Y, or Z axis. Operating normal translational random flat profile 10 - 400 Hz 0.4 GRMS b.
6.4.7 Acoustics Sound power during idle mode shall be 3.1 bels typical when measured to ISO 7779 specification. There will not be any discrete tones more than 10 dB above the masking noise on typical drives when measured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the masking noise on any drive. 6.4.8 Electromagnetic susceptibility See Section 2.1.1.1. Savvio 15K SAS Product Manual, Rev.
6.5 Mechanical specifications Refer to Figure 9 for detailed mounting configuration dimensions. See Section 8.3, “Drive mounting.” Height: Width: Depth: Weight: 0.583 in 2.76 in 3.957 in 0.50 pounds 14.8 mm 70 mm 100.5 mm 0.227 kilograms Temperature Measurement Location Figure 9. 34 Mounting configuration dimensions Savvio 15K SAS Product Manual, Rev.
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 11 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 4 equates the read and write retry count with the maximum possible recovery time for read and write recovery of individual LBAs.
7.4 Background Media Scan Background Media Scan (BMS) is a self-initiated media scan. BMS is defined in the T10 document SPC-4 available from the T10 committee. BMS performs sequential reads across the entire pack of the media while the drive is idle. In RAID arrays, BMS allows hot spare drives to be scanned for defects prior to being put into service by the host system. On regular duty drives, if the host system makes use of the BMS Log Page, it can avoid placing data in suspect locations on the media.
7.7 Idle Read After Write Idle Read After Write (IRAW) utilizes idle time to verify the integrity of recently written data. During idle periods, no active system requests, the drive reads recently written data from the media and compares it to valid write command data resident in the drives data buffer. Any sectors that fail the comparison result in the invocation of a rewrite and auto-reallocation process. The process attempts to rewrite the data to the original location.
8.0 Installation Savvio disc 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 accomodate 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 M3 x 0.5 metric 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 disc 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 Savvio 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 Savvio drives. 9.1.1 task management functions Table 5 lists the SAS task management functions supported.
9.2 Dual port support Savvio 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 7 lists the SCSI commands supported by Savvio drives.
Table 7: Commands supported by Savvio SAS family drive (continued) Command name Command code Supported Last n Deferred Errors or Asynchronous Events page (0Bh) N Last n Error Events page (07h) N Non-medium Error page (06h) Y Pages Supported list (00h) Y Read Error Counter page (03h) Y Read Reverse Error Counter page (04h) N Self-test Results page (10h) Y Background Medium Scan page (15h) Y Start-stop Cycle Counter page (0Eh) Y Temperature page (0Dh) Y Verify Error Counter page (05h)
Table 7: Commands supported by Savvio SAS family drive (continued) Command name Command code Supported Read Capacity (10) 25h Y Read Capacity (16) 9Eh/10h N Read Defect Data (10) 37h Y Read Defect Data (12) B7h Y Read Long 3Eh Y Read Long (16) 9Eh/11h N Reassign Blocks 07h Y Receive Diagnostic Results 1Ch Y Supported Diagnostics pages (00h) Y Translate page (40h) Y Release 17h Y Release (10) 57h Y Report LUNs A0h Y Request Sense 03h Y Actual Retry Count bytes Y
Table 7: Commands supported by Savvio SAS family drive (continued) Command name Command code Supported Verify (12) AFh N Verify (16) AFh N Verify (32) 7Fh/000Ah N Write (6) 0Ah Y Write (10) 2Ah Y DPO bit Y FUA bit Y Write (12) AAh N Write (16) 8Ah N Write (32) 7Fh/000Bh N Write and Verify (10) 2Eh Y DPO bit Y Write and Verify (12) AEh N Write and Verify (16) 8Eh N Write and Verify (32) 7Fh/000Ch N Write Buffer (modes 0, 2, supported) 3Bh Y Firmware Download
9.3.1 Inquiry data Table 8 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual.
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. On standard OEM drives, the saved values are taken from the default values list and stored into the saved values storage location on the media prior to shipping. 3. Current values Current values are volatile values being used by the drive to control its operation.
Table 9: Mode Sense data default and changeable values for ST973451SS drives MODE DATA HEADER: 03 fa 00 10 00 00 00 08 BLOCK DESCRIPTOR: 08 8b b9 98 00 00 02 00 MODE PAGES: DEF CHG 81 0a c0 0b ff 00 00 00 05 00 ff ff 81 0a ff ff 00 00 00 00 ff 00 ff ff DEF CHG 82 0e 00 00 00 00 00 00 00 00 01 3a 00 00 00 00 82 0e 00 00 00 00 00 00 00 00 ff ff 00 00 00 00 DEF CHG 83 16 21 18 00 00 00 1c 00 00 02 80 02 00 00 01 00 c8 00 90 40 00 00 00 83 16 00 00 00 00 ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Table 10: Mode Sense data default and changeable values for ST936751SS drives MODE DATA HEADER: 03 fa 00 10 00 00 00 08 BLOCK DESCRIPTOR: 04 45 dc cc 00 00 02 00 MODE PAGES: DEF CHG 81 0a c0 0b ff 00 00 00 05 00 ff ff 81 0a ff ff 00 00 00 00 ff 00 ff ff DEF CHG 82 0e 00 00 00 00 00 00 00 00 01 3a 00 00 00 00 82 0e 00 00 00 00 00 00 00 00 ff ff 00 00 00 00 DEF CHG 83 16 10 8c 00 00 00 0e 00 00 02 80 02 00 00 01 00 c8 00 90 40 00 00 00 83 16 00 00 00 00 ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0
9.4 Miscellaneous operating features and conditions Table 11 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 12 shows the location of the SAS device connector J1. Figures 13 and 14 provide the dimensions of the SAS connector. 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.. Figure 12. 54 Physical interface Savvio 15K 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 13. SAS device plug dimensions Savvio 15K SAS Product Manual, Rev.
Detail A 6.10 S14 2.25 S8 0.05 x 45 (5X) 0.05 0.40 4.85 0.30 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 0.08 0.05 0.05 1.90 0.08 30 Detail 2 2.40 0.08 0.10 A SECTION B - B D Figure 14. 56 SAS device plug dimensions (detail) Savvio 15K SAS Product Manual, Rev.
9.4.2 Physical characteristics This section defines physical interface connector. 9.4.3 Connector requirements Contact your preferred connector manufacturer for mating part information. Part numbers for SAS connectors will be provided in a future revision of this publication when production parts are available from major connector manufacturers. The SAS device connector is illustrated in Figures 13 and 14. 9.4.
Table 13: 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 3.3Volts) -Port A_in P3 NC (reserved 3.
9.4.7 Power 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 current return for the +12 volt power supply is through the common ground pins. The supply current and return current must be distributed as evenly as possible among the pins. Three +5 volt pins provide power to the drive, 2 short and 1 long. The current return for the +5 volt power supply is through the common ground pins.
Table 16 defines the general interface characteristics. Table 16: General interface characteristics Characteristic Units 1.5 Gbps 3.0 Gbps Bit rate (nominal) Mbaud 1,500 3,000 Unit interval (UI)(nominal) ps 666.6 333.3 Impedance (nominal, differential ) ohm 100 100 Transmitter transients, maximum V ± 1.2 ± 1.2 Receiver transients, maximum V ± 1.2 ± 1.2 9.5.2.1 Eye masks 9.5.2.1.
9.5.2.1.3 Jitter tolerance masks Figure 17 describes the receive tolerance eye masks and is constructed using the X2 and Z2 values given in table 19. X1OP is half the value for total jitter intable 19 and X1TOL is half the value for total jitter in table 20, for jitter frequencies above ((bit rate) / 1.667).
Figure 18 defines the sinusoidal jitter mask. Peak-topeak sinusoidal jitter (in UI) Sinusoidal jitter frequency (log/log plot) FNOM = 1.5 x 10 9 for 1.5 Gbps FNOM = 3.0 x 10 9 for 3.0 Gbps 1.5 1.0 0.1 0 FNOM / 25,000 FNOM / 1,667 Frequency (in kHz) Figure 18. Sinusoidal jitter mask 9.5.2.2 Transmitter signal characteristics Table 17 specifies the signal requirements at the transmitter end of a TxRx connection as measured into the zero-length test load.
Table 17: Transmitter signal characteristics Signal characteristica Units 1.5 Gbps 3.0 Gbps a All tests in this table shall be performed with zero-length test load shown in figure 20. b The skew measurement shall be made at the midpoint of the transition with a repeating 0101b pattern on the physical link. The same stable trigger, coherent to the data stream, shall be used for both the Tx+ and Tx- signals.
9.5.2.3.1 Jitter Table 19 defines the maximum allowable jitter. Table 19: Maximum allowable jitter 1.5 Gbps m, n 3.0 Gbps m, n Deterministic jitterq Total jitterc,d,e,f 0.35 Deterministic jittere 0.55 Total jitterc,d,e,f 0.35 0.55 a Units are in UI. b The values for jitter in this section are measured at the average amplitude point. c Total jitter is the sum of deterministic jitter and random jitter.
9.5.2.3.4 Impedance specifications Table 21 defines impedance requirements. Table 21: Impedance requirements (Sheet 1 of 2) Requirement Time domain reflectometer rise time 20 % to 80 %a,b Units 1.5 Gbps 3.0 Gbps ps 100 50 ohm 100 ± 10 100 ± 10 ohm 5 5 ohm 32.5 ± 7.5 32.5 ± 7.5 ohm 100 ± 15 100 ± 15 ohm 5 5 ohm 32.5 ± 7.5 32.5 ± 7.
Table 21: Impedance requirements (Sheet 2 of 2) Requirement Units 1.5 Gbps 3.0 Gbps a All times indicated for time domain reflectometer measurements are recorded times. Recorded times are twice the transit time of the time domain reflectometer signal. b All measurements are made through mated connector pairs. c The media impedance measurement identifies the impedance mismatches present in the media when terminated in its characteristic impedance.
S 21 = – 20 × log 10 ( e ) × ( ( 6, 5 × 10 –6 ×f 0, 5 ) + ( 2, 0 × 10 – 10 × f ) + ( 3, 3 × 10 – 20 2 × f ) ) dB for 50 MHz < f < 1.5 GHz, and: S 21 = – 5, 437 dB for 1.5 GHz < f < 5.0 GHz, where: a) f is the signal frequency in hertz. The transmission magnitude response of the TCTF in dB is given by the following equation for 3.0 Gbps: S 21 = – 20 × log 10 ( e ) × ( ( 6, 5 × 10 –6 ×f 0, 5 ) + ( 2, 0 × 10 – 10 × f ) + ( 3, 3 × 10 – 20 2 × f ) ) dB for 50 MHz < f < 3.
Figure 20 shows the zero-length test load. 50 ohm 10 nF Tx+ Probe points 10 nF Tx- 50 ohm SAS internal connector Figure 20. Zero-length test load Figure 21 shows an ISI loss example at 3.0 Gbps. S 21 (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 Figure 21. 1.5 Frequency (GHz) 3.0 ISI loss example at 3.0 Gbps Figure 22 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 21. 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 18.
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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 59 5 volt pins 59 A abort task set function 43 AC coupling 58 AC power requirements 23 ACA active status 53 ACA active, faulted initiator status 53 acoustics 33 active LED Out signal 59 actuator assembly design 7 adaptive caching 53 air cleanliness 32 air flow 29, 40 illustrated 40 air inlet 40 altitude 30 ambient 29 ambient temperature 29, 40 ANSI documents SCSI 5 Serial Attached SCSI 5 asynchronous event notification 53 audible noise 3 auto write and read reallocation programm
environmental control 32 error management 35 rates 15 errors 35 internal defects/errors 35 internal drive characteristics 11 IRAW 38 F jumpers 39 FCC rules and regulations 3 features 8 interface 43 firmware 8 corruption 48 flawed sector reallocation 8 Format command execution time 12 function complete, code 00 43 not supported, code 05 43 reject, code 04 43 L G Good status 53 gradient 29 ground shift noise 58 grounding 41 H HDA 40, 41 head and disc assembly (HDA) 7 head and disc assembly.
N noise audible 3 noise immunity 25 non-operating 29, 30, 32 temperature 29 non-operating vibration 32 O office environment 32 operating 29, 30, 32 option selection 57 orientation 30 out-of-plane distortion 41 P package size 31 package test specification 5 packaged 31 parameter rounding 53 PCBA 41 peak bits per inch 11 peak operating current 23, 24 peak-to-peak measurements 25 performance characteristics detailed 11 general 12 performance degradation 30 performance highlights 8 physical damage 32 physical
operation 53 system chassis 41 T task management functions 43 Abort task set 43 Clear ACA 43 Clear task set 43 terminate task 43 task management response codes 43 Function complete 00 43 Function not supported 05 43 Function reject 04 43 task set full status 53 technical support services 71 temperature 29, 40 ambient 29 case 29 gradient 29 limits 29 non-operating 29 regulation 3 See also cooling terminate task function 43 terminators 39 tracks per inch 11 tracks per surface 11 transmitters 58 transporting
Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 100407739, Rev.
