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Cheetah X15 Disc Drive:

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ST318451LW/LC

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ST39251LC

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Product Manual, Volume 1

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Summary of Contents for Cheetah X15

Page 1: ... Cheetah X15 Disc Drive ST318451LW LC ST39251LC Product Manual Volume 1 ...

Page 2: ......

Page 3: ... Cheetah X15 Disc Drive ST318451LW LC ST39251LC Product Manual Volume 1 ...

Page 4: ...ONE SeaBOARD and SeaTDD are either trademarks or registered trade marks of Seagate Technology LLC or one of its subsidiaries All other trademarks or registered trade marks are the property of their respective owners Seagate reserves the right to change without notice product offerings or specifications No part of this publication may be reproduced in any form without written permission of Seagate ...

Page 5: ...art number 75789509 If you need the SCSI Interface information order the Volume 2 Interface Manual part number 75789509 Revision Date Writer Engineer Sheets Affected Rev B Class A Release 05 01 2000 L Newman G Velaski 1 1 v thru viii 1 thru 80 and back cover Rev C 07 12 2000 K Schweiss G Velaski front cover 9 13 15 17 18 40 41 45 47 49 56 57 59 60 62 65 67 69 74 76 and back cover ...

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Page 7: ... execution time minutes 9 4 2 3 Generalized performance characteristics 9 4 3 Start stop time 10 4 4 Prefetch multi segmented cache control 10 4 5 Cache operation 10 4 5 1 Caching write data 11 4 5 2 Prefetch operation 12 5 0 Reliability specifications 13 5 1 Error rates 13 5 1 1 Environmental interference 13 5 1 2 Read errors 13 5 1 3 Write errors 13 5 1 4 Seek errors 13 5 2 Reliability and servi...

Page 8: ... 4 Drive mounting 43 8 5 Grounding 43 9 0 Interface requirements 45 9 1 General description 45 9 2 SCSI interface messages supported 45 9 3 SCSI interface commands supported 46 9 3 1 Inquiry Vital Product data 49 9 3 2 Mode Sense data 50 9 4 SCSI bus conditions and miscellaneous features supported 53 9 5 Synchronous data transfer 54 9 5 1 Synchronous data transfer periods supported 54 9 5 2 REQ AC...

Page 9: ... and power vs input output operations per second LVD 26 Figure 11 Locations of PCBA components listed in Table 4 28 Figure 12 Recommended mounting 30 Figure 13 LW mounting configuration dimensions 32 Figure 14 LC mounting configuration dimensions 33 Figure 15 J6 jumper header 38 Figure 16 J5 jumper header on LW models only 39 Figure 17 J2 option select header 40 Figure 18 Air flow suggested 42 Fig...

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Page 11: ...terface specifications to the extent described in this manual The SCSI Interface Product Manual part num ber 75789509 describes general SCSI interface characteristics of this and other families of Seagate drives From this point on in this product manual the reference to Cheetah X15 models is referred to as the drive unless references to individual models are necessary Figure 1 Cheetah X15 family d...

Page 12: ...2 Cheetah X15 Product Manual Rev C ...

Page 13: ...properly packaged However it is the user s responsibility to assure that the drive meets the appropriate EMI requirements in their system Shielded I O cables may be required if the enclosure does not provide adequate shielding If the I O cables are external to the enclosure shielded cables should be used with the shields grounded to the enclosure and to the host con troller 2 1 2 Electromagnetic s...

Page 14: ...l Seagate P N 75789509 Applicable ANSI small computer system interface SCSI document numbers T10 1143D Enhanced SCSI Parallel Interface EPI T10 1236D Primary Commands 2 SPC 2 T10 996D SCSI Block Commands SBC T10 1157D SCSI Architectural Model 2 SAM 2 T10 1302D SPI 3 SCSI Parallel Interface version 3 SFF 8046 Specification for 80 pin connector Package Test Specification Seagate P N 30190 001 under ...

Page 15: ... configuring host software and automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets logical block addressing is used The head and disc assembly HDA is sealed at the factory Air circulates within the HDA through a non replaceable filter to maintain a contamination free HDA environment Refer to Figure 2 for an exploded view of the drive T...

Page 16: ...6 Cheetah X15 Product Manual Rev C Figure 2 Cheetah X15 family drive exploded view ...

Page 17: ...d servo design Self diagnostics performed when power is applied to the drive Zoned bit recording ZBR Vertical horizontal or top down mounting Dynamic spindle brake 4 096 kbytes data buffer Hot plug compatibility Section 9 6 4 2 lists proper host connector needed for LC model drives Drive Self Test DST Supports SCSI bus fairness 3 2 Media characteristics The media used on the drive has an aluminum ...

Page 18: ... the maximum capacity 3 7 Factory installed accessories OEM Standard drives are shipped with the Cheetah X15 Installation Guide part number 83329485 and the Safety and Regulatory Agency Specifications part number 75789512 unless otherwise specified The factory also ships with the drive a small bag of jumper plugs used for the J2 J5 and J6 option select jumper headers 3 8 Options factory installed ...

Page 19: ...tage differential LVD interface mode 5 0 to 80 Mbytes sec 5 0 to 160 Mbytes sec ST318451 ST39251 Drive capacity 18 35 9 2 GByte formatted rounded off values Read write heads 10 6 Bytes track 176 843 176 843 Bytes average rounded off values Bytes surface 1 835 1 835 Mbytes unformatted rounded off values Tracks surface total 10 377 10 377 Tracks user accessible Tracks inch 21 400 21 400 TPI Peak bit...

Page 20: ...ithin 20 seconds typically excluding an error recovery procedure The Motor Start Command can also be used to command the drive to stop the spindle see the SCSI Interface Product Manual There is no power control switch on the drive 4 4 Prefetch multi segmented cache control The drive provides prefetch read look ahead and multi segmented cache control algorithms that in many cases can enhance system...

Page 21: ...d capability of the individual segments greatly enhances the buffer s overall performance as a cache storage allowing a wide range of user selectable config urations which includes their use in the prefetch operation if enabled even when cache operation is disabled see Section 4 5 2 The number of segments is set dynamically by the drive and cannot be set by the host The size in Kbytes of each segm...

Page 22: ... is prefetched replaces data already in some buffer segment s the host can limit the amount of prefetch data to optimize system perfor mance The max prefetch field bytes 8 and 9 limits the amount of prefetch The drive does not use the Prefetch Ceiling field bytes 10 and 11 During a prefetch operation the drive crosses a cylinder boundary to fetch more data only if the Discontinuity DISC bit is set...

Page 23: ...ecovery procedures without operator interven tion 5 1 2 Read errors Before determination or measurement of read error rates The data that is to be used for measurement of read error rates must be verified as being written correctly on the media All media defect induced errors must be excluded from error rate calculations 5 1 3 Write errors Write errors can occur as a result of media defects enviro...

Page 24: ...t period Number of drive failures in the period Estimated power on operation hours means power up hours per disc drive times the total number of disc drives in service Each disc drive shall have accumulated at least nine months of operation Data shall be calculated on a rolling average base for a minimum period of six months MTBF is based on the following assumptions 8 760 power on hours per year ...

Page 25: ... that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus A device being removed shall maintain power and ground connections after the dis connection of any device signal contact from the bus see SFF 8046 SCA 2 specification It is the responsibility of the systems integrator to assure that no hazards from temperature energy vol...

Page 26: ...ribute data will be saved to the disc for the purpose of recreating the events that caused a predic tive failure The drive will measure and save parameters once every two hours subject to an idle period on the SCSI bus The process of measuring off line attribute data and saving data to the disc is uninterruptable and the maximum delay is summarized below Maximum processing delay On line only delay...

Page 27: ...olled by the Enable Warning EWasc bit and the reporting mechanism is controlled by the Method of Reporting Informational Exceptions field MRIE on the Informational Exceptions Control IEC mode page 1Ch The current algorithm implements two temperature trip points The first trip point is set at 65 C which is the maximum temperature limit according to the drive specification The second trip point is u...

Page 28: ...ve to be returned to Seagate as a failed drive 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 disc In these conditions the drive responds to a Test Unit Ready command with an 02 04 00 or 02 04 03 code 5 2 10 2 2 Invoking DST To invoke DS...

Page 29: ...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 This will cause a 01 self test aborted by the application client code to appear in the self test results values log All other abort mechanisms will be reported as a 02 self test routine ...

Page 30: ...20 Cheetah X15 Product Manual Rev C ...

Page 31: ...Os per second for ST39251 models Current and power specified at nominal voltages Decreasing 5 volts by 5 increases 5 volt current by 3 2 Decreasing 12 volt supply by 5 increases 12 volt current by 1 4 2 for ST39251 models 7 During idle the drive heads are relocated every 60 seconds to a random location within the band from three quarters to maximum track General Notes from Table 3 1 Minimum curren...

Page 32: ...nnector See Section 8 1 for pin selection information To delay the motor until the drive receives a Start Unit command enable the Enable Remote Motor Start option on the J2 connector 6 2 3 12 V Current profile Figure 3 identifies the drive 12 V current profile The current during the various times is as shown Note All times and currents are typical See Table 3 for maximum current requirements 5 V 1...

Page 33: ... 5 V current profile 0 0 2 4 6 8 10 12 14 16 0 5 0 5 0 5 A Seconds T0 T1 T3 T4 AC Envelope T2 12 Volt Current during spindle start Typical Amperes DC average of waveform 0 0 2 4 6 8 10 12 14 16 0 0 0 5 1 0 A Seconds T2 T4 T1 T0 T3 T5 Nominal average DC curve AC Envelope 5 Volt Current during spindle start Typical Amperes ...

Page 34: ...ent profile 0 0 2 4 6 8 10 12 14 16 0 0 0 5 1 0 1 5 2 0 2 5 3 0 A Seconds T0 T1 T3 AC Envelope 12 Volt Current during spindle start Typical Amperes DC average of waveform T2 T4 0 0 2 4 6 8 10 12 14 16 0 0 0 5 1 0 A Seconds T2 T4 T1 T0 T3 T5 Nominal average DC curve AC Envelope 5 Volt Current during spindle start Typical Amperes ...

Page 35: ...7 and 8 Locate the typical I O rate for a drive in your system on the horizontal axis and read the cor responding 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 ST318451 DC current and power vs input output operations per second SE Figure 8 ST318451 DC current and power vs input output operations per second LVD 1 800...

Page 36: ...ate the typical I O rate for a drive in your system on the horizontal axis and read the cor responding 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 ST39251 DC current and power vs input output operations per second SE Figure 10 ST39251 DC current and power vs input output operations per second LVD 1 800 0 50 100 I ...

Page 37: ...pact to specified MTBF Air flow may be needed to achieve these temperatures see Section 8 3 1 Continual or sustained operation at case temperatures above these values may degrade MTBF To confirm that the required cooling for the electronics and HDA is provided place the drive in its final mechanical configuration perform random write read operations After the temperatures stabilize measure the cas...

Page 38: ...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 10 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 Model LW PCBA Mode...

Page 39: ...ontinue when normal operating shock levels resume Shock may be applied in the X Y or Z axis Shock is not to be repeated more than two times per second c Non operating The limits of non operating shock shall apply to all conditions of handling and transportation This includes both isolated drives and integrated drives The drive subjected to nonrepetitive shock not exceeding 75 Gs at a maximum durat...

Page 40: ...30 Cheetah X15 Product Manual Rev C Figure 12 Recommended mounting Z Y X Z Y X ...

Page 41: ...ting abnormal translational random flat profile 10 400 Hz 1 2 GRMS c Non operating The limits of non operating vibration shall apply to all conditions of handling and transportation This includes both isolated drives and integrated drives The drive shall not incur physical damage or degraded performance as a result of continuous vibration not exceeding 5 22 Hz 0 040 inches 1 02 mm displacement zer...

Page 42: ...s J H L B A S K 1 M C R F 1 D E P G Mounting holes are 6 32 UNC 2B three on each side and four on the bottom Max screw penetration into side of drive is 0 15 in 3 81 mm Max screw tightening torque is 8 0 in lb 4 43 nm with minimum full thread engagement of 0 12 in 3 05 mm Notes 1 Inches A B C D E F G H J K L M P R S T U 26 10 147 00 101 60 92 25 3 18 44 45 41 28 28 50 101 60 6 35 41 60 4 60 41 28 ...

Page 43: ...8 0 in lb 4 43 nm with minimum full thread engagement of 0 12 in 3 05 mm Notes 1 Inches A B C D E F H J K L M N P R S T U 26 10 147 00 101 60 92 25 3 18 44 45 28 50 101 60 6 35 41 60 4 60 1 20 41 28 66 50 7 00 0 38 0 38 1 028 5 787 4 000 3 750 125 1 750 1 122 4 000 250 1 638 181 040 1 625 2 618 276 015 015 max max 010 010 010 010 020 010 010 010 020 max 020 010 040 max max max max 25 25 25 25 50 2...

Page 44: ...34 Cheetah X15 Product Manual Rev C ...

Page 45: ... required in video applications For addi tional information on this refer to the Error Recovery Page table in the SCSI Interface Product Manual which describes the Mode Select Mode Sense Error Recovery parameters The error recovery scheme supported by the drive provides a means to control the total error recovery time for the entire command in addition to controlling the recovery level for a singl...

Page 46: ...ecovery time limit Note A recovery time limit of 0 will use the drive s default value of FF FF Minimum recovery time limit is achieved by setting the Recovery Time Limit field to 00 01 7 3 SCSI systems errors Information on the reporting of operational errors or faults across the interface is given in the SCSI Interface Product Manual Message Protocol System is described in the SCSI Interface Prod...

Page 47: ... prior to power on If jumpers are changed after power has been applied recycle the drive power to make the new settings effective Installation instructions are provided by host system documentation or with any additionally purchased drive installation software If necessary see Section 10 for Seagate support services telephone numbers Do not remove the manufacturer s installed labels from the drive...

Page 48: ...cover 11 9 7 5 3 1 Drive Activity LED 4 6 Dashed area is optional host circuitry external to the drive connected to host supplied optional usage plug Do not connect anything to pins 13 20 5V Host Alternate Usage Plug Reserved Pins 6 8 4 2 4 A L E D R E S 3 SCSI ID 1 SCSI ID 2 SCSI ID 3 SCSI ID 4 SCSI ID 5 SCSI ID 6 SCSI ID 7 SCSI ID 8 SCSI ID 9 SCSI ID 10 SCSI ID 11 SCSI ID 12 SCSI ID 13 SCSI ID 1...

Page 49: ...Ground 4 Host Alternate Usage Plug Pins 1 3 5 and 7 are optional connections to switching circuits in host equipment to establish drive ID Remote Switches For ID selection use jumpers as shown or connect a cable for remote switching as shown below Dashed area is optional host circuitry external to the drive connected to host supplied optional usage plug 4 Reserved Pins 2 4 6 and 8 are normally not...

Page 50: ...ault condition The PCBA on LC models does not have connector J5 The J5 connector signals conform to SFF 8009 Revision 2 0 Unitized Connector for Cabled Drives signal assignments for auxiliary connectors 2 These signals are also on 80 pin J1 I O connector See Tables 17 and 18 3 Voltage supplied by the drive Delay Motor Start Enable Remote Motor Start Write Protect Parity Disable Term Power to SCSI ...

Page 51: ...after 24 second delay etc On On Drive spindle starts when Start Unit command received from host Delayed start feature is overridden and does not apply when ME jumper is installed WP On Entire drive is write protected Off Drive is not write protected Default is WP jumper not installed PD On Parity checking and parity error reporting by the drive is disabled Off Drive checks for parity and reports r...

Page 52: ... the tempera ture measurement guidelines described in Section 6 4 1 Forced air flow may be required to keep temperatures at or below the specified case temperatures of Table 4 in which case the drive should be oriented or air flow directed so that the 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 i...

Page 53: ...o 5 25 inch adapter frame verify with Seagate Tech nology that the drive can meet the shock and vibration specifications given herein while mounted in such an adapter frame Adapter frames that are available may not have a mechanical structure capa ble of mounting the drive so that it can meet the shock and vibration specifications listed in this manual 8 5 Grounding Signal ground PCBA and HDA grou...

Page 54: ...44 Cheetah X15 Product Manual Rev C ...

Page 55: ...amily drives Notes 1 Extended messages see the SCSI Interface Product Manual 2 Supports all options except qas_req and iu_req Table 6 SCSI messages supported by Cheetah X15 family drives Message name Message code Supported by SCSI 2 3 Abort 06h Y Abort tag 0Dh Y Bus device reset 0Ch Y Clear ACA 16h N Clear queue 0Eh Y Command complete 00h Y Continue I O process 12h Y Disconnect 04h Y Extended mess...

Page 56: ... Y DSP bit supported Y IMMED bit supported Y VS vendor specific N Inquiry 12h Y Date code page C1h 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 Log sense 4Dh Y Application c...

Page 57: ...pacity 25h Y Read defect data 10 37h Y Read defect data 12 B7h Y Read extended 28h Y DPO bit supported Y FUA bit supported Y Read long 3Eh Y 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 Request sense 03h Y Actual retry count bytes Y Extended sense Y Field pointer bytes Y Reserve 16h Y 3rd party reserve ...

Page 58: ...Translate page 40h Y Set limits 33h N Start unit stop unit spindle ceases rotating 1Ch 1Bh Y Synchronize cache 35h Y Test unit ready 00h Y Verify 2Fh Y BYTCHK bit Y Write 0Ah Y Write and verify 2Eh Y DPO bit Y Write buffer modes 0 2 supported 3Bh Y Firmware download option modes 5 7 Ah and Bh supported 3 Y Write extended 2Ah Y DPO bit Y FUA bit Y Write long 3Fh Y Write same 41h Y PBdata N LBdata N...

Page 59: ...el of drive Shown here are hex values for Model ST318451LW For LC models bytes 24 25 and 26 are 4C 43 20 5 Copyright Year changes with actual year 9 3 1 Inquiry Vital Product data Instead of the standard Inquiry data shown in Table 8 the initiator can request several Vital Product Data pages by setting the Inquiry command EVPD bit to one The SCSI Interface Product Manual lists the Vital Product Da...

Page 60: ...ates which of the current values and saved values can be changed by a Mode Select command A one allows a change to a corresponding bit a zero allows no change For example in Table 9 refer to Mode page 01 in the row entitled CHG These are hex numbers representing the changeable values for mode page 01 Note that bytes 04 05 06 and 07 are not changeable because those fields are all zeros If some chan...

Page 61: ...81 0A FF FF 00 00 00 00 FF 00 FF FF 02 DEF 82 0E 80 80 00 0A 00 00 00 00 00 00 00 00 00 00 02 CHG 82 0E FF FF 00 00 00 00 00 00 00 00 87 00 00 00 03 DEF 83 16 02 B8 00 00 00 04 00 00 01 5A 02 00 00 01 00 4C 00 50 40 00 00 00 03 CHG 83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 DEF 84 16 00 28 89 0A 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3A A7 00 00 04 CHG 84 16 00 0...

Page 62: ...0 40 00 00 00 03 CHG 83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 DEF 84 16 00 28 89 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3A A7 00 00 04 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 07 DEF 87 0A 00 0B F0 00 00 00 00 00 FF FF 07 CHG 87 0A 0F FF 00 00 00 00 00 00 FF FF 08 DEF 88 12 14 00 FF FF 00 00 FF FF FF FF 80 14 00 00 00 00 00...

Page 63: ...em Y Asynchronous Data Transfer N Asynchronous Event Notification Y Attention Condition N Auto Contingent Allegiance Condition Y Contingent Allegiance Condition Y Deferred Error Handling Y Disconnect Reconnect N High voltage differential HVD interface available Y Low voltage differential LVD interface available Y Parameter Rounding controlled by the Round bit in Mode Select page 0 Y Queue tagging ...

Page 64: ...9 6 Physical interface This section describes the connectors cables signals terminators and bus timing of the DC and SCSI I O interface See Section 9 8 and Section 9 9 for additional terminator information Figures 19 and 20 show the locations of the DC power connector SCSI interface connector drive select head ers and option select headers Details of the physical electrical and logical characteris...

Page 65: ... SCSI I O connector Figure 20 LC model drive physical interface 80 pin J1 SCSI I O connector J5 Pin 1A 68 Pin SCSI I O Connector Pin 1P J1 DC Power J6 J1 Pin 1 J1 DC Power Pin 1P 2P 3P 4P Power 12V 12V ret 5V ret 5V J1 Pin 1 1P 2P 3P 4P J5 Pin 1A PCB J2 J6 80 pin SCSI I O Connector Pin 1 J2 ...

Page 66: ...for that purpose LC and LW model drives do not have onboard termination circuits Some type of external termination circuits must be provided for these drives by the end user or designers of the equipment into which the drives will be integrated See Standard T10 1302D sections 6 6 and 6 7 for the max imum number of devices that can successfully operate at various interface transfer rates on SE and ...

Page 67: ...at cable connector part numbers are 1 See Figure 21 The drive device connector is a nonshielded 68 conductor connector consisting of two rows of 34 female pins with adjacent pins 50 mils apart The connector is keyed by means of its shape see Figure 22 9 6 4 2 Mating connectors for LC model drives The nonshielded connector shall be an 80 conductor connector consisting of two rows of 40 contacts wit...

Page 68: ... To insure that both drive connector and host equipment mating connector mate properly both drive connector and host equipment mating connector must meet the provisions of SFF 8046 Specification for 80 pin connec tor for SCSI Disk Drives ...

Page 69: ...2D including host adapter initiator The cable length restriction limits the total number of devices allowed 5 SCSI ID7 has highest arbitration priority then ID15 to ID8 ID 8 very lowest 6 Last drive on the daisy chain 7 Open end type 68 pin connector used If end device use external terminator and closed end type 68 pin connector Figure 21 SCSI daisy chain interface cabling for LW drives Straight i...

Page 70: ...8 00 3 650 92 71 840 005 21 34 315 010 8 00 001 002dia 083 2 1 Trifurcated Pins 4 places 085 2 16 x 45 chamfer typ 20 5 08 typ 60 15 24 100 2 54 Pos 1 Pos 2 1 2 3 4 1 816 46 13 Position 1 Pos 68 Pos 35 1 650 41 91 980 24 89 1 368 37 74 767 19 48 050 1 27 218 5 54 Pos 1 022 050 020 047 0787 200 1 650 3937 600 346 3 650 005 270 155 ...

Page 71: ...12 70 500 2 15 0 10 2 places 57 87 2 278 Y 0 15 M Y M 0 15 M Y M 0 0 15 000 006 62 15 2 447 0 15 005 Housing X X Contact 0 3 012 M Y M 1 27 05 Typ C L of Datum Y C L of Datum Y 0 50 020 Pin 1 Pin 40 Pin 41 Pin 80 Pin 1 Front View End View Top View Back View Insert mating I O connector Grounding Pins Grounding Pins ...

Page 72: ...0 39 DBP1 GND 6 11 12 40 DB0 GND 7 13 14 41 DB1 GND 8 15 16 42 DB2 GND 9 17 18 43 DB3 GND 10 19 20 44 DB4 GND 11 21 22 45 DB5 GND 12 23 24 46 DB6 GND 13 25 26 47 DB7 GND 14 27 28 48 DBP GND 15 29 30 49 GND GND 16 31 32 50 GND TermPwr 17 33 34 51 TermPwr TermPwr 18 35 36 52 TermPwr Reserved 19 37 38 53 Reserved GND 20 39 40 54 GND GND 21 41 42 55 ATN GND 22 43 44 56 GND GND 23 45 46 57 BSY GND 24 4...

Page 73: ... 12 40 DB0 DB1 7 13 14 41 DB1 DB2 8 15 16 42 DB2 DB3 9 17 18 43 DB3 DB4 10 19 20 44 DB4 DB5 11 21 22 45 DB5 DB6 12 23 24 46 DB6 DB7 13 25 26 47 DB7 DBP 14 27 28 48 DBP Ground 15 29 30 49 Ground DIFFSNS 8 16 31 32 50 Ground TermPwr 17 33 34 51 TermPwr TermPwr 18 35 36 52 TermPwr Reserved 19 37 38 53 Reserved Ground 20 39 40 54 Ground ATN 21 41 42 55 ATN Ground 22 43 44 56 Ground BSY 23 45 46 57 BSY...

Page 74: ...NC 10 6 46 DIFFSNS 8 DB11 7 47 GND DB10 8 48 GND DB9 9 49 GND DB8 10 50 GND I O 11 51 GND REQ 12 52 GND C D 13 53 GND SEL 14 54 GND MSG 15 55 GND RST 16 56 GND ACK 17 57 GND BSY 18 58 GND ATN 19 59 GND DBP 20 60 GND DB7 21 61 GND DB6 22 62 GND DB5 23 63 GND DB4 24 64 GND DB3 25 65 GND DB2 26 66 GND DB1 27 67 GND DB0 28 68 GND DP1 29 69 GND DB15 30 70 GND DB14 31 71 GND DB13 32 72 GND DB12 33 73 GN...

Page 75: ...6 46 DIFFSNS 8 DB11 7 47 DB11 DB10 8 48 DB10 DB9 9 49 DB9 DB8 10 50 DB8 I O 11 51 I O REQ 12 52 REQ C D 13 53 C D SEL 14 54 SEL MSG 15 55 MSG RST 16 56 RST ACK 17 57 ACK BSY 18 58 BSY ATN 19 59 ATN DBP 20 60 DBP0 DB7 21 61 DB7 DB6 22 62 DB6 DB5 23 63 DB5 DB4 24 64 DB4 DB3 25 65 DB3 DB2 26 66 DB2 DB1 27 67 DB1 DB0 28 68 DB0 DBP1 29 69 DP1 DB15 30 70 DB15 DB14 31 71 DB14 DB13 32 72 DB13 DB12 33 73 D...

Page 76: ...rical specifications 9 7 1 Multimode SE and LVD alternatives When the interface DIFFSNS line is between 0 35 V and 0 5 V the drive interface circuits operate single ended and up to and including 20 M transfers s Fast 20 or Ultra SCSI When DIFFSNS is between 0 7 V and 1 9 V the drive interface circuits operate low voltage differential and up to and including 80 M transfers s or less Fast 40 or Ultr...

Page 77: ...ly conform to EIA RS 485 983 Figure 25 Typical SE LVD alternative transmitter receiver circuits 9 7 1 1 Single ended drivers receivers The maximum total cable length allowed with drives using single ended I O driver and receiver circuits depends on several factors Table 19 lists the maximum lengths allowed for different configurations of drive usage These values are from the SPI 3 document All dev...

Page 78: ...actory system operation If shielded and unshielded cables are mixed within the same SCSI bus the effect of impedance mismatch must be carefully considered Proper impedance matching is especially important in order to maintain adequate margin at fast SCSI transfer rates 9 8 Terminator requirements Caution These drives do not have onboard internal terminators The user systems integrator or host equi...

Page 79: ...7 1 39 µs Reselect Identify MSG to Status T15 4 5 8 Command Dependent Reselect Identify MSG to Data media T16 4 5 11 Command Dependent Data to Status T17 4 5 15 Command Dependent Status to Command Complete MSG T18 4 5 5 8 15 0 98 µs Command Complete MSG to Bus Free T19 4 5 5 8 15 0 51 µs Data to Save Data Pointer MSG T20 4 5 14 4 00 µs Save Data Pointer MSG to Disconnect MSG T21 4 5 14 0 79 µs Com...

Page 80: ...2 µs MSG IN Byte Transfer T32 4 5 5 7 8 14 15 0 04 µs MSG OUT Byte Transfer T33 4 5 2 0 04 µs STATUS Byte Transfer T34 4 5 5 8 15 0 04 µs Synchronous Data Transfer Characteristics Request Signal Transfer Period 3 various 800 ns max Table 21 Drive activity LED status Spindle status Command status LED status Spinning up with DC power applied N A On until spinup is complete Spun down Start Unit On wh...

Page 81: ...st and easy comparison shop ping and seamless integration with key distributors for a one stop shopping experience For support questions and comments http reseller seagate com benefits T1 html or 1 877 271 3285 toll free 9 A M to 7 P M eastern time Monday through Friday SeaBOARD is a computer bulletin board system that contains information about Seagate disc and tape drive products and is availabl...

Page 82: ...on Other customers should contact their place of purchase Authorized Service Centers If you live outside the US you can contact an Authorized Service Center for service USA Canada Latin America Support Services Presales Support Call Center Toll free Direct dial FAX Disc 1 877 271 3285 405 936 1210 1 405 936 1683 Tape 1 800 626 6637 1 714 641 2500 1 714 641 2410 Server Appliance 1 800 732 4283 1 40...

Page 83: ...or presales technical support warranty service and FAX services in Africa and the Middle East dial our European call center at 31 20 316 7222 from 8 30 A M to 5 00 P M European central time Monday through Friday or send a FAX to 31 20 653 3513 The European call center is located in Amsterdam The Nether lands Asia Pacific Support Services For Asia Pacific presales and technical support dial the tol...

Page 84: ...74 Cheetah X15 Product Manual Rev C ...

Page 85: ...connector 56 bus device reset message 50 bytes per sector 48 bytes surface 9 bytes track 9 C cabinet cooling 42 cable 54 cache 10 11 12 cache buffer 7 cache miss 11 cache mode 10 cache operation 10 cache operation hit 12 cache segment 11 caching write data 11 Canadian Department of Communications 3 capacities 8 capacity drive programmable 8 case temperature 27 CE Marking 3 change definition comman...

Page 86: ...37 drive primary defects list 35 drive SCSI timing 69 drive select header 54 drive spindle 41 drive transfer 11 drive volume 37 drive warranty 15 dynamic spindle brake 7 E ECC 13 ECC correction capability 7 electrical characteristics 54 66 electromagnetic compatibility 3 electromagnetic interference EMI 13 electromagnetic susceptibility 31 embedded servo 7 EMC compliance 3 EMI requirements 3 envir...

Page 87: ...5 mating connector 54 57 mating flat cable connector 57 maximum current requirements 22 maximum operating current 21 maximum starting current 21 ME jumper 41 mean time between failure See MTBF media 7 50 media defect 13 media defect induced error 13 medium error 14 message protocol 54 message protocol system 36 messages SCSI interface 45 miscellaneous features 53 mode page 01 50 mode page 08h 10 m...

Page 88: ...de 10 prefetch of contiguous blocks 12 prefetch operation 10 12 prefetch segmented cache control 10 preventive maintenance 13 15 printed circuit board See PCB PRML read channel electronics 5 product data page 49 programmable drive capacity 8 R radio interference regulations 3 read 11 read command 11 12 read data 11 read error 13 read error rate 13 35 read operation 11 read retry count 35 read writ...

Page 89: ...0h 11 supply voltage 21 support services 71 synchronous data transfer 54 synchronous data transfer operation 70 synchronous data transfer period 54 synchronous transfer period 70 system chassis 43 system recovery procedures 13 T technical support services 71 temperature 10 17 27 42 ambient 27 case 27 gradient 27 non operating 28 PCB and HDA 27 regulation 3 See also cooling temperature sensor 17 te...

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Page 92: ...Seagate Technology LLC 920 Disc Drive Scotts Valley California 95066 4544 USA Publication Number 83329484 Rev C Printed in USA ...

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