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Savvio 15K SAS Product Manual, Rev. B

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. If a
verification of this rewrite fails, the sector is re-mapped to a spare location.

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Содержание ST600MP0074

Страница 1: ...PRODUCT MANUAL Savvio 15K SAS 100407739 Rev B March 2007 ST973451SS ST936751SS ...

Страница 2: ...e United States and or other countries All other trademarks or registered trademarks are the property of their respective owners One gigabyte or GB equals one billion bytes when referring to hard drive capacity Accessible capacity may vary depending on operating environment and formatting Quantitative usage examples for various applications are for illustrative purposes Actual quantities will vary...

Страница 3: ...Savvio 15K SAS Product Manual Rev B i Revision status summary sheet Revision Date Notes Rev A 09 15 06 Initial release Rev B 03 28 07 Changes per ECR0076456 ...

Страница 4: ...ii Savvio 15K SAS Product Manual Rev B ...

Страница 5: ...cution time 12 4 2 3 General performance characteristics 12 4 3 Start stop time 13 4 4 Prefetch multi segmented cache control 13 4 5 Cache operation 13 4 5 1 Caching write data 14 4 5 2 Prefetch operation 14 5 0 Reliability specifications 15 5 1 Error rates 15 5 1 1 Recoverable Errors 15 5 1 2 Unrecoverable Errors 15 5 1 3 Seek errors 16 5 1 4 Interface errors 16 5 2 Reliability and service 16 5 2...

Страница 6: ...Write 38 8 0 Installation 39 8 1 Drive orientation 39 8 2 Cooling 40 8 3 Drive mounting 41 8 4 Grounding 41 9 0 Interface requirements 43 9 1 SAS features 43 9 1 1 task management functions 43 9 1 2 Task management responses 43 9 2 Dual port support 44 9 3 SCSI commands supported 45 9 3 1 Inquiry data 49 9 3 2 Mode Sense data 49 9 4 Miscellaneous operating features and conditions 53 9 4 1 SAS phys...

Страница 7: ...er vs input output operations per second 28 Figure 7 Location of the HDA temperature check point 29 Figure 8 Recommended mounting 31 Figure 9 Mounting configuration dimensions 34 Figure 10 Physical interface 39 Figure 11 Air flow 40 Figure 12 Physical interface 54 Figure 13 SAS device plug dimensions 55 Figure 14 SAS device plug dimensions detail 56 Figure 15 SAS transmitters and receivers 58 Figu...

Страница 8: ......

Страница 9: ...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 ...

Страница 10: ...2 Savvio 15K SAS Product Manual Rev B ...

Страница 11: ...closure prior to use The drive is supplied as a subassembly and is not subject to Subpart B of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reasonable shielding The drive is capable of meeting the Class B li...

Страница 12: ...ents of the Electromagnetic Compatibility Directive 89 336 EEC of 03 May 1989 as amended by Directive 92 31 EEC of 28 April 1992 and Directive 93 68 EEC of 22 July 1993 Australian C Tick If this model has the C Tick Marking it complies with the Australia New Zealand Standard AS NZS3548 1995 and meets the Electromagnetic Compatibility EMC Framework requirements of Australia s Spectrum Man agement A...

Страница 13: ...dard operat ing procedures that ensure that restricted substances are not utilized in our manufacturing operations labora tory analytical validation testing and an internal auditing process to ensure that all standard operating procedures are complied with 2 2 Reference documents Savvio 15K SAS Installation Guide Seagate part number 100407741 SCSI Commands Reference Manual Seagate part number 1002...

Страница 14: ...6 Savvio 15K SAS Product Manual Rev B ...

Страница 15: ...This allows you to continue to leverage your existing investment in SCSI while gaining a 3Gb s serial data transfer rate The head and disc assembly HDA is sealed at the factory Air recirculates within the HDA through a non replaceable filter to maintain a contamination free HDA environment Note Never disassemble the HDA and do not attempt to service items in the sealed enclosure heads media actuat...

Страница 16: ...20 bits No preventive maintenance or adjustments required Dedicated head landing zone Embedded servo design Automatic shipping lock Self diagnostics performed when power is applied to the drive Zone bit recording ZBR Vertical horizontal or top down mounting Dynamic spindle brake 16 Mbyte data buffer see Section 4 5 Drive Self Test DST Background Media Scan BGMS Idle Read After Write IRAW Power Sav...

Страница 17: ...ration to genera tion depending on how each block size actually formats out for zone frequencies and splits over servo bursts This added capacity potential may range from 0 1 to 1 3 percent above the guaranteed capacities listed above Using the drives in this manner gives the absolute maximum capacity potential but the user must determine if the extra capacity potential is useful or whether their ...

Страница 18: ...he drive is normally shipped in bulk packaging to provide maximum protection against transit damage Units shipped individually require additional protection as provided by the single unit shipping pack Users planning single unit distribution should specify this option The Savvio 15K SAS Installation Guide part number 100407741 is usually included with each standard OEM drive shipped but extra copi...

Страница 19: ...58 130 58 Gbit in2 Internal data rate 957 51 to 1 282 08 957 51 to 1 282 08 Mbits sec variable with zone Disc rotation speed 15k 15k rpm Avg rotational latency 2 2 msec 4 2 Seek performance characteristics See Section 9 4 1 SAS physical interface on page 54 and the SAS Interface Manual part number 100293071 for additional timing details 4 2 1 Access time Gen 2 0 LP data Not including controller ov...

Страница 20: ...ify 35 minutes 18 minutes Sustained trasfer rate 79 to 112 Mbytes sec SAS Interface maximum instantaneous transfer rate 300 Mbytes sec per port dual port 600 Mbytes sec Logical block sizes 512 default 520 524 and 528 Read write consecutive sectors on a track Yes Flaw reallocation performance impact for flaws reallocated at format time using the spare sectors per sparing zone reallocation scheme Ne...

Страница 21: ...e operations are independent features from the standpoint that each is enabled and disabled independently using the Mode Select command however in actual opera tion the prefetch feature overlaps cache operation somewhat as described in sections 4 5 1 and 4 5 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 ...

Страница 22: ...e cleared The new data is cached for subsequent Read commands If the number of write data logical blocks exceed the size of the segment being written into when the end of the segment is reached the data is written into the beginning of the same cache segment overwriting the data that was written there at the beginning of the operation however the drive does not overwrite data that has not yet been...

Страница 23: ...is determined using read bits transferred for recoverable errors occurring during a read and using write bits transferred for recoverable errors occurring during a write 5 1 2 Unrecoverable Errors An unrecoverable data error is defined as a failure of the drive to recover data from the media These errors occur due to head media or write problems Unrecoverable data errors are only detected during r...

Страница 24: ...duct AFR decrease the MTBF The AFR MTBF is a population statistic not releveant to individual units The AFR MTBF specification is based on the following assumptions for Business Critical Storage System environments 8 760 power on hours per year 250 average on off cycles per year Operations at nominal voltages Systems will provide adequate cooling to ensure the case temperatures specified in Sectio...

Страница 25: ...surement and data logging process occurs To accomplish this issue a Log Sense command to log page 0x3E This allows you to control when S M A R T interruptions occur Forcing S M A R T with the RTZ command resets the timer Performance impact S M A R T attribute data is saved to the disc so that the events that caused a predictive failure can be recre ated The drive measures and saves parameters once...

Страница 26: ...e interface when the tem perature exceeds a set threshold The temperature is measured at power up and then at ten minute intervals after power up The thermal monitor system generates a warning code of 01 0B01 when the temperature exceeds the speci fied limit in compliance with the SCSI standard The drive temperature is reported in the FRU code field of mode sense data You can use this information ...

Страница 27: ...ries are exhausted Read error after retries are exhausted Write error after retries are exhausted Recovered errors will not be reported as diagnostic failures 5 2 6 2 Implementation This section provides all of the information necessary to implement the DST function on this drive 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 com...

Страница 28: ... be initialized as follows 1 The Function Code field is set to the same value as sent in the DST command 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 Self Test Results Log page in non volatile memory The host may use Log Sense t...

Страница 29: ...g or shipping a drive use only a Seagate approved container Keep your original box Seagate approved containers are easily identified by the Seagate Approved Package label Shipping a drive in a non approved container voids the drive warranty Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in tran sit Contact your authorized Seagate distributor to pur...

Страница 30: ...22 Savvio 15K SAS Product Manual Rev B ...

Страница 31: ...ated apply at the drive connector Table 2 ST973451SS DC power requirements Notes ST973451SS 1 5 Gbit mode ST973451SS 3 0 Gbit mode Amps Amps Amps Amps Voltage 5V 12V 2 5V 12V 2 Regulation 5 5 5 2 5 5 2 Avg idle current DCX 1 6 0 74 0 19 0 73 0 19 Maximum starting current peak DC DC 3σ 3 0 81 1 50 0 79 1 49 peak AC AC 3σ 3 1 04 2 30 1 22 2 27 Delayed motor start max DC 3σ 1 4 0 60 0 03 0 63 0 03 Op...

Страница 32: ...om three quarters to maximum track General DC power requirement notes 1 Minimum current loading for each supply voltage is not less than 1 7 of the maximum operating current shown 2 The 5V and 12V supplies should employ separate ground returns 3 Where power is provided to multiple drives from a common supply careful consideration for individual drive power requirements should be noted Where multip...

Страница 33: ...6 2 2 Power sequencing The drive does not require power sequencing The drive protects against inadvertent writing during power up and down 6 2 3 Current profiles Typical 12V and 5V current profiles are shown below Note All times and currents are typical See Tables 2 and 3 for maximum current requirements Figure 1 Typical ST973451SS current profile 5V 250 mV pp from 0 to 100 kHz to 20 MHz 12V 800 m...

Страница 34: ...26 Savvio 15K SAS Product Manual Rev B Figure 2 Typical ST936751SS current profile ...

Страница 35: ...in 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 Figure 4 ST973451SS 1 5 Gbit DC current and power vs input output oper...

Страница 36: ...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 Figure 6 ST936751SS 1 5 Gbit DC current and power vs input output operations per se...

Страница 37: ...out impact to specified MTBF Air flow may be needed to achieve these tempera tures Continual or sustained operation at case temperatures above these values may degrade MTBF The maximum allowable continuous or sustained HDA case temperature for the rated MTBF is 122 F 50 C To confirm that the required cooling for the electronics and HDA is provided place the drive in its final mechanical configurat...

Страница 38: ...ion of 2 msec half sinewave Shock may be applied in the X Y or Z axis b Operating abnormal Equipment as installed for normal operation does not incur physical damage while subjected to intermit tent shock not exceeding 40 Gs at a maximum duration of 11 msec half sinewave Shock occurring at abnormal levels may promote degraded operational performance during the abnormal shock period Speci fied oper...

Страница 39: ...aged in single or multipacks with a gross weight of 20 pounds 8 95 kg or less by Seagate for general freight shipment shall withstand a drop test from 48 inches 1 070 mm against a concrete floor or equivalent Figure 8 Recommended mounting Package size Packaged product weight Drop height 600 cu in 9 800 cu cm Any 60 in 1524 mm 600 1800 cu in 9 800 19 700 cu cm 0 20 lb 0 to 9 1 kg 48 in 1219 mm 1800...

Страница 40: ...to peak 20 500 Hz 3 0 G zero to peak Vibration may be applied in the X Y or Z axis Non operating translational random flat profile 10 500 Hz 1 2 GRMS 6 4 5 Air cleanliness The drive is designed to operate in a typical office environment with minimal environmental control 6 4 6 Corrosive environment Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposu...

Страница 41: ...red to ISO 7779 specification There will not be any discrete tones more than 10 dB above the masking noise on typical drives when mea sured 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 ...

Страница 42: ...fer to Figure 9 for detailed mounting configuration dimensions See Section 8 3 Drive mounting Figure 9 Mounting configuration dimensions Height 0 583 in 14 8 mm Width 2 76 in 70 mm Depth 3 957 in 100 5 mm Weight 0 50 pounds 0 227 kilograms Temperature Measurement Location ...

Страница 43: ...ist is not altered after factory formatting Locations of defects found and reallocated during error recovery procedures after drive shipment are listed in the G list defects growth list The P and G lists may be referenced by the initiator using the Read Defect Data command Details of the SCSI commands supported by the drive are described in the SAS Interface Manual Also more information on the dri...

Страница 44: ...radation of the unrecovered error rate For example suppose the read write recovery page has the RC bit set to 0 read retry count set to 4 and the recovery time limit set to 450 A four LBA Read command is allowed to take up to 253 11 msec recov ery time for each block and a maximum of 450 msec recovery for all four blocks If either of these limits is reached and a block has not yet been recovered t...

Страница 45: ...een found by the host system during critical data accesses early in the drive s life The default setting for Media Pre Scan is enabled on standard products Media Pre Scan checks each write command to determine if the destination LBAs have been scanned by BMS If the LBAs have been verified the drive proceeds with the normal write command If the LBAs have not been verified by BMS Pre Scan will conve...

Страница 46: ...m 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 If a verification of this rewrite fails the sector is re mapped to a spare location ...

Страница 47: ...e drive in a non backplane host system connecting the drive using high quality cables is acceptable as long as the I O cable length does not exceed 4 meters 13 1 feet Slide the carrier or tray into the appropriate bay in your host system using the instructions provided by the host system This connects the drive directly to your system s SAS connector The SAS connector is normally located on a SAS ...

Страница 48: ...e least amount of air flow resistance is created while providing air flow to the electronics and HDA Also the shortest possible path between the air inlet and exit should be chosen to minimize the travel length of air heated by the drive and other heat sources within the rack cabinet or drawer environment If forced air is determined to be necessary possible air flow patterns are shown in Figure 11...

Страница 49: ...ur mounting points fixed and evaluating the out of plane deflection of the fourth mounting point when a known force F is applied to the fourth point 8 4 Grounding Signal ground PCBA and HDA ground are connected together in the drive and cannot be separated by the user The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electri cally isolating shock mounts ...

Страница 50: ...42 Savvio 15K SAS Product Manual Rev B ...

Страница 51: ... functions Table 5 lists the SAS task management functions supported 9 1 2 Task management responses Table 6 lists the SAS response codes returned for task management functions supported Table 5 SAS task management functions supported Task name Supported Abort Task Yes Clear ACA Yes Clear task set Yes Abort task set Yes Logical Unit Reset Yes Query Task Yes Table 6 Task management response codes F...

Страница 52: ...ed negotiation it indicates the only sup ported speed is the speed selected by the first port If the first port to complete speed negotiation looses sync before the second port completes speed negotiation both ports revert back to the power on condition of allow ing either link rate 1 5 or 3 0 Gbits sec Subject to buffer availability the Savvio drives support Concurrent port transfers The drive su...

Страница 53: ...pported Y IMMED bit supported Y VS vendor specific N Inquiry 12h Y Date Code page C1h Y Device Behavior page C3h Y Firmware Numbers page C0h Y Implemented Operating Def page 81h Y Jumper Settings page C2h Y Supported Vital Product Data page 00h Y Unit Serial Number page 80h Y Lock unlock cache 36h N Log Select 4Ch Y PCR bit Y DU bit N DS bit Y TSD bit Y ETC bit N TMC bit N LP bit N Protocol specif...

Страница 54: ...Ah Y 2 Caching Parameters page 08h Y Control Mode page 0Ah Y Disconnect Reconnect 02h Y Error Recovery page 01h Y Format page 03h Y Information Exceptions Control page 1Ch Y Background Scan mode subpage 01h Y Notch and Partition Page 0Ch N Protocol Specific Port page 19h Y Power Condition page 1Ah Y Rigid Disc Drive Geometry page 04h Y Unit Attention page 00h Y Verify Error Recovery page 07h Y Xor...

Страница 55: ...e Y Field Pointer bytes Y Reserve 16h Y 3rd Party Reserve Y Extent Reservation N Reserve 10 56h Y 3rd Party Reserve Y Extent Reservation N Rezero Unit 01h Y Search Data Equal 31h N Search Data High 30h N Search Data Low 32h N Seek 6 0Bh Y Seek 10 2Bh Y Send Diagnostics 1Dh Y Supported Diagnostics pages 00h Y Translate page 40h Y Set Limits 33h N Start Unit Stop Unit spindle ceases rotating 1Bh Y S...

Страница 56: ...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 option modes 5 7 Ah and Bh supported 3 Y Write Long 10 3Fh Y Write Long 16 9Fh 11h N Write S...

Страница 57: ... be changed only by downloading a complete set of new firmware into the flash E PROM An initiator can request and receive from the drive a list of default values and use those in a Mode Select command to set up new current and saved values where the values are change able 2 Saved values Saved values are stored on the drive s media using a Mode Select command Only parameter values that are allowed ...

Страница 58: ...eable For example in Table 9 refer to Mode page 81 in the row entitled CHG These are hex numbers representing the changeable values for Mode page 81 Note in columns 5 and 6 bytes 04 and 05 there is 00h which indicates that in bytes 04 and 05 none of the bits are changeable Note also that bytes 06 07 09 10 and 11 are not changeable because those fields are all zeros In byte 02 hex value FF equates ...

Страница 59: ...0 95 9a 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00 CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 DEF 87 0a 00 0b ff 00 00 00 00 00 ff ff CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00 CHG 88 12 a5 00 00 00 ff ff ff ff 00 00 20 00 00 00 00 00 00 00 DEF 8a 0a 02 00 00 00 00 00 00 00 04 2e CHG 8a 0a 0...

Страница 60: ...00 95 9a 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00 CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 DEF 87 0a 00 0b ff 00 00 00 00 00 ff ff CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00 CHG 88 12 a5 00 00 00 ff ff ff ff 00 00 20 00 00 00 00 00 00 00 DEF 8a 0a 02 00 00 00 00 00 00 00 03 18 CHG 8a 0a ...

Страница 61: ... N Synchronized locked spindle operation Y Segmented caching N Zero latency read Y Queue tagging up to 128 queue tags supported Y Deferred error handling Y Parameter rounding controlled by Round bit in Mode Select page 0 Y Reporting actual retry count in Extended Sense bytes 15 16 and 17 N Adaptive caching Y SMP 1 in Mode Select command needed to save RPL and rotational offset bytes Table 12 Misce...

Страница 62: ...he 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 Physical interface ...

Страница 63: ...1 27 6X 1 27 14X 15 875 0 35MIN 15 875 33 43 0 05 B 4 90 0 08 0 84 0 05 22X 0 15 B P15 P1 S7 S1 SEE Detail1 0 30 0 05 4X 4 00 0 08 0 15 D 0 30 0 05 2X 41 13 0 15 B B C C A A 0 20 B 42 73 REF C OF DATUM D L 1 10 R0 30 0 08 4X 2 00 3X 5 08 0 45 0 03 7X 0 10 M E 4 65 0 80 6X 7 62 5 92 0 52 0 08 x 45 ...

Страница 64: ...x 45 5X 0 40 0 05 X 45 3X CORING ALLOWED IN THIS AREA 2 25 0 05 4 85 0 05 0 10 B E S14 S8 4 40 0 15 SEE Detail 2 3 90 0 15 SECTION A A SECTION C C A 0 35 0 05 45 R0 30 0 08 C 1 95 0 08 0 08 0 05 1 23 0 05 0 08 0 05 Detail 2 CONTACT SURFACE FLUSH TO DATUM A 0 03 65 30 1 90 0 08 SECTION B B 2 40 0 08 0 10 A D ...

Страница 65: ...re revision of this publication when production parts are available from major connec tor manufacturers The SAS device connector is illustrated in Figures 13 and 14 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 ...

Страница 66: ...al type S1 Port A Ground P1 NC reserved 3 3Volts S2 Port A_in Diff input pair P2 NC reserved 3 3Volts S3 Port A_in P3 NC reserved 3 3Volts S4 Port A Ground P4 Ground S5 Port A_out Diff output pair P5 Ground S6 Port A_out P6 Ground S7 Port A Ground P7 5 Volts charge S8 Port B Ground P8 5 Volts S9 Port B_in Diff input pair P9 5 Volts S10 Port B_in P10 Ground S11 Port A Ground P11 Ready LED Open coll...

Страница 67: ...me information 9 5 1 Ready LED Out The Ready LED Out signal is driven by the drive as indicated in Table 14 The Ready LED Out signal is designed to pull down the cathode of an LED The anode is attached to the proper 3 3 volt supply through an appropriate current limiting resistor The LED and the current limiting resis tor are external to the drive See Table 15 for the output characteristics of the...

Страница 68: ... 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 Figure 16 Receive eye mask Verifying compliance with the limits represented by the receive eye mask should be done with reverse channel traffic present in order that the effects of crosstalk are taken into account Table 16 General interface c...

Страница 69: ... than that given in table 18 and Z1TOL and Z1OP shall be defined from those slopes by the following equa tion where Z1TOL is the value for Z1 to be used for the tolerance masks and Z1OP X1OP and X2OP are the values in table 18 for Z1 X1 and X2 The X1 points in the receive tolerance masks are greater than the X1 points in the receive masks due to the addition of sinusoidal jitter Absolute amplitude...

Страница 70: ...evels corresponding to the lowest supported transfer rate Table 17 specifies the signal characteristics Table 17 Transmitter signal characteristics Signal characteristica Units 1 5 Gbps 3 0 Gbps Skewb ps 20 15 Tx Off Voltagec mV P P 50 50 Maximum rise fall timed ps 273 137 Minimum rise fall timed ps 67 67 Maximum transmitter output imbalancee 10 10 OOB offset deltaf mV 25 25 OOB common mode deltag...

Страница 71: ... the idle times of an OOB signal Table 18 Receiver signal characteristics Signal characteristic Units 1 5 Gbps 3 0 Gbps Jitter see figure 16 b N A See table 19 See table 19 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 Max voltage non op mV P P 2 000 2 000 Minimum OOB ALIGN burst amplitudec mV P P 240 240 Maximum noise during OOB idle timec mV P ...

Страница 72: ...s the magnitude of the asymmetry shall not exceed the allowed maximum total jitter The numerical difference between the average of the peaks with a BER 10 12 and the average of the individual events is the measure of the asymmetry Jitter peak to peak measured maximum total jitter Asymmetry Table 20 Receiver jitter tolerance 1 5 Gbpsa 3 0 Gbpsa Sinusoidal jitterb c Deterministic jittere f h Total j...

Страница 73: ...m 32 5 7 5 32 5 7 5 Mated connectors Differential impedanceb c d ohm 100 15 100 15 Differential impedance imbalanceb c d g ohm 5 5 Common mode impedanceb c d ohm 32 5 7 5 32 5 7 5 Receiver termination Differential impedanceb e f ohm 100 15 100 15 Differential impedance imbalanceb e f g ohm 5 5 Receiver termination time constantb e f ps 150 max 100 max Common mode impedanceb e ohm 20 min 40 max 20 ...

Страница 74: ...fies the impedance mismatches present in the media when terminated in its characteristic impedance This measurement excludes mated connectors at both ends of the media when present but includes any intermediate connectors or splices The mated connectors measurement applies only to the mated connector pair at each end as applicable d Where the media has an electrical length of 4 ns the procedure de...

Страница 75: ...ance with the TCTF test load requirement is verified by measuring the signal produced by the transmit ter through a physical compliance interconnect attached to the transmitter Compliance with the zero length test load requirement verified by measurement made across a load equiva lent to the zero length load shown in figure 20 For both test load cases the transmitter delivers the output voltages a...

Страница 76: ...bps Figure 22 ISI loss example at 1 5 Gbps Tx Tx 10 nF 50 ohm 50 ohm Probe points SAS internal connector 10 nF ISI loss 3 9 dB 10 9 dB Frequency GHz Sample compliance interconnect 0 3 0 1 5 0 3 S21 dB Compliance interconnect magnitude response and ISI loss example for 3 0 Gbps ISI loss 2 0 dB Frequency GHz Sample compliance interconnect 0 1 5 0 75 0 15 S21 dB Compliance interconnect magnitude resp...

Страница 77: ... objective when the signal at a receiving phy has the addi tional sinusoidal jitter present that is specified in table 20 and the common mode signal VCM over frequency range FCM as specified in table 16 The jitter tolerance is shown in Figure 18 for all Rx compliance points in a TxRx connection The figure given assumes that any external interference occurs prior to the point at which the test is a...

Страница 78: ...70 Savvio 15K SAS Product Manual Rev B ...

Страница 79: ... with product information program benefits and sales tools You may register for customized communications that are not available on the web These communications contain product launch EOL pricing promotions and other channel related information To learn more about the benefits or to register go to spp seagate com any time from anywhere in the world Seagate Service Centers Presales Support Our Pres...

Страница 80: ...ilable on a global basis for the return of defective products Contact your customer support representative for the location nearest you USA Canada Latin America support services For an extensive list of telephone numbers to technical support presales and warranty service in USA Canada Latin America including business hours go to the Contact Us page on www seagate com Global Customer Support Presal...

Страница 81: ...e data 14 Canadian Department of Communications 3 capacity unformatted 11 case temperature 29 check condition status 53 class B limit 3 clear ACA function 43 clear task set function 43 commands supported 45 condensation 29 condition met good status 53 connector illustrated 57 requirements 57 continuous vibration 32 cooling 40 CRC error 16 Current profiles 25 customer service 21 D DAR 37 data block...

Страница 82: ...ternal drive characteristics 11 IRAW 38 J jumpers 39 L latency average rotational 11 logical block address 13 logical block reallocation scheme 8 logical block size 8 12 logical segments 13 M maintenance 15 maximum delayed motor start 23 24 maximum start current 23 24 mean time between failure See MTBF media description 8 Media Pre Scan 37 miscellaneous feature support Adaptive caching 53 Asynchro...

Страница 83: ...ivers 58 recommended mounting 31 Recoverable Errors 15 recovered media data 15 reference documents 5 relative humidity 29 reliability 9 specifications 15 reliability and service 16 repair and return information 21 reporting actual retry count 53 reservation conflict status 53 resonance 30 return information 21 rotation speed 11 S safety 3 SAS interface 57 physical interface 54 task management func...

Страница 84: ...3 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 the drive 21 U unformatted 9 Unrecoverable Errors 15 unrecovered media data 15 V vibration 30 32 W warra...

Страница 85: ......

Страница 86: ...Seagate Technology LLC 920 Disc Drive Scotts Valley California 95066 4544 USA Publication Number 100407739 Rev B Printed in USA ...

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