Seagate Cheetah X15 36LP ST318432LC Product Manual Download

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Cheetah X15 36LP Disc Drive:

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ST336752LW/LC, ST336732LW/LC

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ST318452LW/LC, ST318432LW/LC

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Product Manual, Volume 1

Summary of Contents for Cheetah X15 36LP ST318432LC

Page 1: ... Cheetah X15 36LP Disc Drive ST336752LW LC ST336732LW LC ST318452LW LC ST318432LW LC Product Manual Volume 1 ...

Page 2: ......

Page 3: ... Cheetah X15 36LP Disc Drive ST336752LW LC ST336732LW LC ST318452LW LC ST318432LW LC Product Manual Volume 1 ...

Page 4: ... LLC Cheetah SeaFAX SeaFONE SeaBOARD and SeaTDD are either registered trademarks or trademarks of Seagate Technology LLC Other product names are registered trademarks or trademarks of their owners Seagate reserves the right to change without notice product offerings or specifications No part of this publica tion may be reproduced in any form without written permission of Seagate Technology LLC ...

Page 5: ...uct Manual part 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 A 06 27 01 L Newman J Nowitzke All Rev B 11 30 01 L Newman B Hohn Pages 27 36 38 39 and 56 Rev C 02 08 02 L Newman B Hohn Pages 5 51 and 52 Rev D 06 04 02 L Newman B Hohn Pages 4 67 70 73 75 ...

Page 6: ......

Page 7: ...inutes 1 8 4 2 3 Generalized performance characteristics 8 4 3 Start stop time 9 4 4 Prefetch multi segmented cache control 9 4 5 Cache operation 9 4 5 1 Caching write data 10 4 5 2 Prefetch operation 11 4 5 3 Optimizing cache performance for desktop and server applications 11 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 ...

Page 8: ...e mounting 41 8 5 Grounding 41 9 0 Interface requirements 43 9 1 General description 43 9 2 SCSI interface messages supported 43 9 3 SCSI interface commands supported 44 9 3 1 Inquiry Vital Product data 47 9 3 2 Mode Sense data 48 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 ACK offse...

Page 9: ...DC current and power vs IOPS LVD 26 Figure 10 Locations of the HDA temperature check point 27 Figure 11 Recommended mounting 29 Figure 12 LW mounting configuration dimensions 31 Figure 13 LC mounting configuration dimensions 32 Figure 14 J6 jumper header 36 Figure 15 J5 jumper header on LW models only 37 Figure 16 J2 option select header on LW models only 38 Figure 17 Air flow suggested 40 Figure ...

Page 10: ......

Page 11: ... interface specifications to the extent described in this manual The SCSI Interface Product Manual part number 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 36LP models is referred to as the drive unless references to individual models are necessary Figure 1 Cheetah X15 3...

Page 12: ...2 Cheetah X15 36LP Product Manual Rev D ...

Page 13: ...s when 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 Electromag...

Page 14: ...nese National Standard CNS 13438 and meets the Electromagnetic Compatibility EMC Framework requirements of the Taiwanese Bureau of Standards Metrology and Inspec tion BSMI 2 3 Reference documents Cheetah X15 36LP Installation Guide Seagate P N 100139875 Safety and Regulatory Agency Specifications Seagate P N 75789512 SCSI Interface Product Manual Seagate P N 75789509 Applicable ANSI small computer...

Page 15: ...5789509 which describes the general interface characteristics of this and other families of Seagate SCSI drives The drive s interface supports multiple initiators disconnect reconnect self 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...

Page 16: ...mum burst correction length of 240 bits with a guaranteed burst correction length of 233 bits Sealed head and disc assembly No preventative maintenance or adjustment required Dedicated head landing zone Embedded 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 8 192 kbytes data buffer H...

Page 17: ...aximum number of LBAs is rounded down to the maximum capacity 3 7 Factory installed accessories OEM Standard drives are shipped with the Cheetah X15 36LP Installation Guide part number 100139875 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...

Page 18: ...interface mode 5 0 to 160 Mbytes sec 5 0 to 320 Mbytes sec ST336752 and ST336732 ST318452 and ST318432 Drive capacity 36 7 18 4 GByte formatted rounded off values Read write heads 8 4 Bytes track 316 155 316 155 Bytes average rounded off values Bytes surface 5 932 5 5 932 5 Mbytes unformatted rounded off values Tracks surface total 18 497 18 497 Tracks user accessible Tracks inch 38 000 38 000 TPI...

Page 19: ...within 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 syste...

Page 20: ...ound 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 s...

Page 21: ...hen it senses that a prefetch hit will likely occur even if two consecutive read operations were not for physically contiguous blocks of data e g software interleave ARLA disables prefetch when it decides that a prefetch hit will not likely occur If the host is not using software interleave and if two sequential read operations are not for contiguous blocks of data ARLA disables prefetch but as lo...

Page 22: ...12 Cheetah X15 36LP Product Manual Rev D ...

Page 23: ...m recovery 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 env...

Page 24: ...isc drive shall have accumulated at least nine months of operation Data shall be cal culated 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 250 average on off cycles per year Operations at nominal voltages Systems will provide adequate cooling to ensure the case temperatures specified in Section 6 4 1 are not ex...

Page 25: ... Bus Reset could result in erroneous bus operations The SCSI bus termination and termination power source shall be external to the device being inserted or removed End users should not mix devices with high voltage differential HVD drivers and receivers and devices with SE LVD or multimode drivers and receivers on the same SCSI bus since the common mode voltages in the HVD environment may not be c...

Page 26: ...terval defines the number of operations over which to mea sure the rate The counter that keeps track of the current number of operations is referred to as the Interval Counter S M A R T measures error rate hence for each attribute the occurrence of an error is recorded A counter keeps track of the number of errors for the current interval This counter is referred to as the Failure Counter Error ra...

Page 27: ...xceeded S M A R T data is collected and a frame is saved to the disc 5 2 9 Drive Self Test DST Drive Self Test DST is a technology designed to recognize drive fault conditions that qualify the drive as a failed unit DST validates the functionality of the drive at a system level There are two test coverage options implemented in DST 1 Extended test 2 Short text The most thorough option is the exten...

Page 28: ...hort 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 me...

Page 29: ...ll other abort mechanisms will be reported as a 02 self test routine was interrupted by a reset condition 5 2 10 Product warranty Beginning on the date of shipment to customer and continuing for a period of five years Seagate warrants that each product including components and subassemblies or spare part that fails to function properly under nor mal use due to defect in materials on workmanship or...

Page 30: ...20 Cheetah X15 36LP Product Manual Rev D ...

Page 31: ...r second for ST318452 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 ST318452 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 current l...

Page 32: ...command enable the Enable Remote Motor Start option on the J2 connector 6 2 3 12 V Current profile Figure 2 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 Figure 2 Typical ST336752 and ST336732 drive 12 V current profile 5 V 150 mV pp from 0 to 100 kHz and 100 mV pp from...

Page 33: ...rive 12 V current profile 0 0 0 5 1 0 Amps Seconds T2 T4 T1 T0 T3 T5 Nominal average DC curve AC Envelope 5 Volt Current during spindle start Typical Amperes 0 0 4 8 12 16 20 24 28 32 1 5 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 1 5 2 0 2 5 A Seconds ...

Page 34: ...ual Rev D Figure 5 Typical ST318452 and ST318432 drive 5 V current profile 0 0 4 8 12 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 20 24 28 32 1 5 ...

Page 35: ...ures 6 and 7 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 6 ST336752 and ST336732 DC current and power vs IOPS SE Figure 7 ST336752 and ST336732 DC current and power vs IOPS LVD 1 800 0 50 100 I Os per Second Amp...

Page 36: ...6 and 7 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 8 ST318452 and ST318432 DC current and power vs IOPS SE Figure 9 ST318452 and ST318432 DC current and power vs IOPS LVD 1 800 0 50 100 I Os per Second Amperes ...

Page 37: ...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 configuration perform random write read operations After the t...

Page 38: ...operational performance will continue 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 exce...

Page 39: ...Cheetah X15 36LP Product Manual Rev D 29 Figure 11 Recommended mounting Z Y X Z Y X ...

Page 40: ...erating 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 ...

Page 41: ...rams 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 ...

Page 42: ...s 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...

Page 43: ...are 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 si...

Page 44: ...e recovery 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 P...

Page 45: ...on 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 dri...

Page 46: ... 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 5 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 I...

Page 47: ...V 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 n...

Page 48: ...or See Tables 18 and 19 3 Voltage supplied by the drive 4 Dashed area is optional host circuitry external to the drive connected to host supplied optional usage plug 5 Do not connect anything to J5 pins 9 11 12 or J6 pins 13 20 6 Connect an external Drive Activity LED to J6 pins 11 and 12 or to J5 pin 8 and the drive s 5V power source through an appropriately sized current limiting resistor The dr...

Page 49: ... after 12 second delay and a drive assigned SCSI ID 2 starts after 24 second delay etc On On Drive spindle starts when the Start Unit command is received from the host The Delayed Start feature is overridden and does not apply when the ME jumper is installed WP On Entire drive is write protected Off Drive is not write protected Default PD Does not apply to LC models On Parity checking and parity e...

Page 50: ...ired to keep temperatures at or below the temperatures specified in Section 6 4 1 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 inlet and exit should be chosen to minimize the travel length of air heated by the drive and ot...

Page 51: ... to 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 man ual 8 5 Grounding Signal ground PCBA and HDA g...

Page 52: ...42 Cheetah X15 36LP Product Manual Rev D ...

Page 53: ...orted by Cheetah X15 36LP family drives Message name Message code Supported by ST336752 and ST318452 models Supported by ST336732 and ST318432 models Abort 06h Y Y Abort tag 0Dh Y Y Bus device reset 0Ch Y Y Clear ACA 16h N N Clear queue 0Eh Y Y Command complete 00h Y Y Continue I O process 12h N N Disconnect 04h Y Y Extended messages 01h 1 Y Y Identify 80h FFh Y Y Ignore wide residue two bytes 23h...

Page 54: ...N Copy and Verify 3Ah N N Format Unit 1 04h Y Y DPRY bit supported N N DCRT bit supported Y Y STPF bit supported Y Y IP bit supported Y Y DSP bit supported Y Y IMMED bit supported Y Y VS vendor specific N N Inquiry 12h Y Y Date Code page C1h Y Y Device Behavior page C3h Y Y Firmware Numbers page C0h Y Y Implemented Operating Def page 81h Y Y Jumper Settings page C2h Y Y Supported Vital Product Dat...

Page 55: ... Y Rigid Disc Drive Geometry page 04h Y Y Unit Attention page 00h Y Y Verify Error Recovery page 07h Y Y Xor Control page 10h N N Mode Sense 10 same pages as Mode Sense 1Ah 5Ah Y Y Prefetch 34h N N Read 08h Y Y Read Buffer modes 0 2 3 Ah and Bh supported 3Ch Y Y Read Capacity 25h Y Y Read Defect Data 10 37h Y Y Read Defect Data 12 B7h Y Y Read Extended 28h Y Y DPO bit supported Y Y FUA bit support...

Page 56: ...ek Extended 2Bh Y Y Send Diagnostics 1Dh Y Y Supported Diagnostics pages 00h Y Y Translate page 40h Y Y Set Limits 33h N N Start Unit Stop Unit spindle ceases rotating 1Bh Y Y Synchronize Cache 35h Y Y Test Unit Ready 00h Y Y Verify 2Fh Y Y BYTCHK bit Y Y Write 0Ah Y Y Write and Verify 2Eh Y Y DPO bit Y Y Write Buffer modes 0 2 supported 3Bh Y Y Firmware Download option modes 5 7 Ah and Bh support...

Page 57: ...3 36 37 35 32 4C 43 ST318452LW 33 31 38 34 35 32 4C 57 ST318452LC 33 31 38 34 35 32 4C 43 ST336732LW 33 33 36 37 33 32 4C 57 ST336732LC 33 33 36 37 33 32 4C 43 ST318432LW 33 31 38 34 33 32 4C 57 ST318432LC 33 31 38 34 33 32 4C 43 5 Copyright Year changes with actual year 9 3 1 Inquiry Vital Product data Instead of the standard Inquiry data shown in Table 7 the initiator can request several Vital P...

Page 58: ...ctates 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 8 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 ch...

Page 59: ...f ff 01 CHG 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 26 e8 00 00 00 33 00 00 01 e8 02 00 00 01 00 98 00 54 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 48 40 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a 94 00 00 04 CH...

Page 60: ...0 98 00 54 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 48 40 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a 94 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...

Page 61: ...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 26 e8 00 00 00 33 00 00 01 e8 02 00 00 01 00 98 00 54 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 48 40 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a 94 00 00 04 CHG 84 16 00 00 00 00 00 00 00 0...

Page 62: ...3 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 48 40 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a 94 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 00 08 CHG 88 12 b5 00...

Page 63: ...ing System 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 ...

Page 64: ... 36LP family drives support REQ ACK offset values from 7 to 63 3Fh Offsets of 1 through 6 are negotiated to 0 asynchronous transfer 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 18 and 19 show the locations of the DC power connector...

Page 65: ...igure 20 for pin assignment mounted at the rear of the main PCBA Recommended part numbers of the mating connector are listed below but equivalent parts may be used LC model drives receive power through the 80 pin I O connector See Tables 18 and 19 Type of cable Connector Contacts 20 14 AWG 14 AWG MP 1 480424 0 AMP 60619 4 Loose Piece AMP 61117 4 Strip ...

Page 66: ...J1 SCSI I O connector Figure 19 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 67: ...chain must all operate in the same mode either SE or LVD but not a mixture of these On the interface daisy chain all signals are common between all devices on the chain or bus as it is also called This daisy chain of SCSI devices must be terminated at both ends with the proper impedance in order to operate correctly Do not terminate intermediate SCSI devices In some cases the SCSI devices at each ...

Page 68: ... to achieve satisfactory 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 20 Fast 40 Fast 80 and Fast 160 SCSI transfer rates Note For LVD operation twisted pair cables are recommended For LVD Fast 40 opera...

Page 69: ...esigned according to proper power transmission design concepts No possibility for the equipment user to attach an 80 pin cable connector should be allowed since the length of the DC power carrying conductors could not be controlled and therefore could become too long for safe power transmission to the drive Daisy chain 80 conductor cables should especially not be allowed since the power carrying c...

Page 70: ...ing 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 has the very lowest priority 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 20 SCSI daisy chain interface cabling for LW drives St...

Page 71: ...5 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 72: ...6 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 73: ... 10 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...

Page 74: ...11 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 B...

Page 75: ... 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 GND 5 V...

Page 76: ...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 DB12 5...

Page 77: ...y be driven by a 3 3V logic device pulled up to 3 3V through a pull up resistor recommended size of 10K ohm or grounded through some other means 9 7 Electrical description Cheetah X15 36LP drives are multimode devices That is their I O circuits can operate as either single ended or low voltage differential drivers receivers selectable using the I O DIFFSENS line See the SPI 4 standard for detailed...

Page 78: ...from the SPI documents All device I O lines must have equal to or less than 25 pf capacitance to ground measured at the beginning of the stub A stub length of no more than 0 1 meter 0 33 ft is allowed off the mainline interconnection with any connected equipment The stub length is measured from the transceiver to the connection to the mainline SCSI bus Single ended I O cable pin assignments for LW...

Page 79: ...shielded round twister pair cable length for Ultra160 Ultra320 30 AWG solid 130 ohms 90 ohms 17 pF ft 1 36 ns ft 0 113 ohms ft 12 meters minus the SCSI trace length of the back plane 28 AWG standed 123 ohms 80 ohms 19 pF ft 1 54 ns ft 0 067 ohms ft 12 meters minus the SCSI trace length of the back plane 28 AWG stranded 132 ohms 85 ohms 20 pF ft 1 50 ns ft 0 065 ohms ft 12 meters minus the SCSI tra...

Page 80: ...O connector or on the end of a short I O cable stub extending past the last cable connector LC drives are designed to be plugged into a backpanel connector without cabling 9 9 Terminator power LW drives You can configure terminator power from the drive to the SCSI bus or have the host adaptor or other device supply terminator power to the external terminator See Section 8 1 for illustrations that ...

Page 81: ... 4 5 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 µ...

Page 82: ...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 24 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 83: ...285 toll free 9 A M to 7 P M eastern time Monday through Friday Tape Purchases US customers can purchase Seagate data cartridges tape supplies accessories and select Seagate tape drive products 24 hours daily at buytape seagate com Automated Services SeaFONE 1 800 SEAGATE is Seagate s toll free number 1 800 732 4283 to access our automated self help services Using a touch tone phone you can find a...

Page 84: ... 1687 Warranty Service Call Center Toll free Direct dial FAX Internet USA Mexico and 1 800 468 3472 1 405 936 1456 1 405 936 1462 Latin America Canada Memofix 1 800 636 6349 1 905 660 4936 1 905 660 4951 www memofix com Adtech 1 800 624 9857 1 905 812 8099 1 905 812 7807 www adtech1 com Brazil MA Centro de Serviços 55 21 2509 7267 55 21 2507 6672 e mail centro de servicos brasil seagate com Europe...

Page 85: ...pport Services For Asia Pacific presales and technical support dial the toll free number for your specific country The Asia Pacific toll free numbers are available from 6 00 A M to 10 45 A M and 12 00 P M to 6 00 P M Australian east ern time Monday through Friday If your country is not listed here direct dial one of our technical support loca tions Call Center Toll free Direct dial FAX Australia 1...

Page 86: ...76 Cheetah X15 36LP Product Manual Rev D ...

Page 87: ... device reset message 48 bytes per sector 46 bytes surface 8 bytes track 8 C cabinet cooling 40 cable 55 cache 9 10 11 cache buffer 6 cache miss 10 cache mode 9 cache operation 9 cache operation hit 11 cache segment 10 caching write data 10 Canadian Department of Communications 3 capacities 7 capacity drive programmable 7 case temperature 27 CE Marking 3 changeable bit 49 51 changeable value 48 ch...

Page 88: ...eader 54 drive transfer 10 drive volume 35 drive warranty 14 dynamic spindle brake 6 E ECC 13 ECC correction capability 6 electrical characteristics 54 67 electromagnetic compatibility 3 electromagnetic interference EMI 13 electromagnetic susceptibility 30 embedded servo 6 EMC compliance 3 EMI requirements 3 environment 40 environmental control 30 environmental interference 13 environmental limits...

Page 89: ...een failure See MTBF media 6 48 media defect 13 media defect induced error 13 medium error 14 message protocol 54 message protocol system 34 messages SCSI interface 43 miscellaneous features 53 mode page 01 48 mode page 08h 9 mode parameter 48 page 08h 11 mode select command 9 48 mode select page 08h 11 mode sense command 48 49 51 mode sense command page 08h 10 mode sense data 48 mode sense value ...

Page 90: ... Arbitration and Selection QAS 43 R radio interference regulations 3 read 10 read command 10 11 read data 10 read error 13 read error rate 13 33 read operation 10 read retry count 33 read write head 8 ready 48 receive diagnostic results 34 receiver circuits 68 recommended mounting 29 recoverable seek error 13 reference documents 4 regulation 21 relative humidity 27 reliability 6 reliability and se...

Page 91: ...eration 72 synchronous data transfer period 54 synchronous transfer period 72 system chassis 41 system recovery procedures 13 T technical support services 73 temperature 9 16 27 40 ambient 27 case 27 gradient 27 non operating 27 regulation 3 See also cooling temperature sensor 17 termination 22 terminator enable jumper TE 60 terminator power 70 terminator requirements 35 70 thermal monitor 16 TP1 ...

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Page 94: ...Seagate Technology LLC 920 Disc Drive Scotts Valley California 95066 4544 USA Publication Number 100139872 Rev D Printed in USA ...

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Seagate Cheetah X15 36LP ST318432LC, Product Manual

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