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Seagate Cheetah 18XL, Product Manual

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Seagate Cheetah 18XL Product Manual Download Page 65

Cheetah 18XL Product Manual, Rev. A

55

mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condi-
tion for the PM bit is set to one for Desktop mode. During the manufacturing process, the Saved value of
the PM bit remains set to the firmware default condition (one) for drives with the LW interface. Drives man-
ufactured with all other interfaces (LC) set the Saved value of the PM bit set to the Server mode (zero).

[3]

When the Performance Mode bit (Page 0, Byte 2, Bit 7) is set to Server mode (zero), the Number of
Cache Segments should be set to sixteen (10h).

Summary of Contents for Cheetah 18XL

Page 1: ...Cheetah 18XL Family ST318404LW LC ST39204LW LC Product Manual Volume 1...

Page 2: ......

Page 3: ...Cheetah 18XL Family ST318404LW LC ST39204LW LC Product Manual Volume 1...

Page 4: ...FONE SeaBOARD and SeaTDD are either trademarks or registered trade marks of Seagate Technology Inc or one of its subsidiaries All other trademarks or registered trade marks are the property of their r...

Page 5: ...CSI interface information in the SCSI Interface Product Manual Volume 2 part number 75789509 If you need the SCSI interface information order the SCSI Interface Product Manual Volume 2 part number 757...

Page 6: ......

Page 7: ...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...

Page 8: ...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...

Page 9: ...put output operations per second LVD 26 Figure 11 Locations of PCBA components listed in Table 3 28 Figure 12 Recommended mounting 30 Figure 13 ST318404LW mounting configuration dimensions 32 Figure 1...

Page 10: ......

Page 11: ...is manual The SCSI Interface Product Manual part num ber 75789509 describes general SCSI interface characteristics of this and other families of Seagate drives The SCSI Interface Product Manual refere...

Page 12: ......

Page 13: ...perly 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 pro...

Page 14: ...gate 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 S...

Page 15: ...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 HD...

Page 16: ...L Product Manual Rev A A high performance actuator assembly with a low inertia balanced patented straight arm design provides excellent performance with minimal power dissipation Figure 2 Cheetah 18XL...

Page 17: ...performed when power is applied to the drive 1 1 Interleave Zoned bit recording ZBR Vertical horizontal or top down mounting Dynamic spindle brake 4 096 kbyte data buffer Hot plug compatibility Sectio...

Page 18: ...block descriptor number of blocks field A value greater than the maximum number of LBAs is rounded down to the maximum capacity 3 7 Factory installed accessories OEM Standard drives are shipped with...

Page 19: ...ec 5 0 to 80 Mbytes sec In low voltage differential LVD interface mode 5 0 to 80 Mbytes sec 5 0 to 160 Mbytes sec ST318404 ST39204 Drive capacity 18 352 9 176 GByte formatted rounded off values Read w...

Page 20: ...typically excluding an error recovery procedure The Motor Start Command can also be used to command the drive to stop the spindle see SCSI Interface Product Manual part number 75789509 There is no pow...

Page 21: ...e configurations 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 may be selected using the Mode Select comm...

Page 22: ...hat 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 o...

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 veri...

Page 24: ...ment 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 ac...

Page 25: ...h 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 aft...

Page 26: ...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...

Page 27: ...a diagnostic failed condition through the self tests results value of the diagnostic log page if a functional failure is encountered during DST The channel and servo parameters are not modified to te...

Page 28: ...es When the drive begins DST it creates a new entry in the Self test Results Log page The new entry is created by inserting a new self test parameter block at the beginning of the self test results lo...

Page 29: ...arranty information refer to the Standard terms and conditions of Purchase for Seagate products Shipping When transporting or shipping a drive a Seagate approved container must be used Keep your origi...

Page 30: ......

Page 31: ...ting condition is defined as random 8 block reads at 204 I Os per second Current and power speci fied at nominal voltages Decreasing 5 volts by 5 increases 5 volt current by 3 58 7 During idle the dri...

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 Curren...

Page 33: ...file 0 0 2 4 6 8 10 12 14 16 18 20 0 0 0 5 1 0 1 5 2 0 2 5 3 0 A Seconds T2 T4 T3 T AC Envelope Nominal average DC curve 12 Volt Current during spindle start Typical Amperes T5 T1 0 0 2 4 6 8 10 12 14...

Page 34: ...rive 5 V current profile 0 0 2 4 6 8 10 12 14 16 18 20 0 0 0 2 0 4 0 6 0 8 1 0 1 2 A Seconds Nominal average DC curve 5 Volt Current during spindle start Typical Amperes 0 0 2 4 6 8 10 12 14 16 18 20...

Page 35: ...efer to the following two I O rate curves see Figures 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 a...

Page 36: ...following two I O rate curves see Figures 9 and 10 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 wa...

Page 37: ...needed to achieve these temperatures see Section 8 3 1 Continual or sustained operation at case tem peratures above these values may degrade MTBF To confirm that the required cooling for the electroni...

Page 38: ...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 rel...

Page 39: ...erformance 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 no...

Page 40: ...30 Cheetah 18XL Product Manual Rev A Figure 12 Recommended mounting Z Y X Z Y X...

Page 41: ...tinue when normal operating vibration levels are resumed This assumes system recovery routines are available c Non operating The limits of non operating vibration shall apply to all conditions of hand...

Page 42: ...680 kilograms 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 tightenin...

Page 43: ...32 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...

Page 44: ......

Page 45: ...uch as 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 Err...

Page 46: ...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...

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...

Page 48: ...over 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 Alter...

Page 49: ...round 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 conne...

Page 50: ...ult 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 connector...

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...

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 3 in which case the drive...

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 ava...

Page 54: ......

Page 55: ...ages supported by the SCSI 2 and SCSI 3 modes of the Cheetah 18XL family drives Table 5 SCSI messages supported by Cheetah 18XL family drives Message name Message code Supported by SCSI 2 3 Abort 06h...

Page 56: ...Copy 18h N Copy and verify 3Ah N Format unit 1 04h Y DPRY bit supported N DCRT bit supported Y STPF bit supported Y IP bit supported Y DSP bit supported Y IMMED bit supported Y VS vendor specific N In...

Page 57: ...h Y Prefetch 34h N Read 08h Y Read buffer modes 0 2 3 Ah and Bh supported 3Ch Y Read capacity 25h Y Read defect data 10 37h Y Read defect data 12 B7h Y Read extended 28h Y DPO bit supported Y FUA bit...

Page 58: ...rted diagnostics pages 00h Y 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...

Page 59: ...and 24 are 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 Product Data p...

Page 60: ...tes 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...

Page 61: ...mand pages for SCSI Ultra160 implementation see the SCSI Interface Product Manual part number 75789509 Definitions SAV Saved value DEF Default value Standard drives are shipped configured this way CH...

Page 62: ...0 01 A5 02 00 00 01 00 4B 00 55 40 00 00 00 03 CHG 00 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 SAV 84 16 00 38 30 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 20 00 0...

Page 63: ...ing the manufacturing process the Saved value of the PM bit remains set to the firmware default condition one for drives with the LW interface Drives man ufactured with all other interfaces LC set the...

Page 64: ...01 A5 02 00 00 01 00 4B 00 55 40 00 00 00 03 CHG 00 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 SAV 84 16 00 38 30 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 20 00 00...

Page 65: ...ing the manufacturing process the Saved value of the PM bit remains set to the firmware default condition one for drives with the LW interface Drives man ufactured with all other interfaces LC set the...

Page 66: ...ting 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 Di...

Page 67: ...ation 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 68: ...I O connector Figure 20 LC model drive physical interface 80 pin J1 SCSI I O connector J5 Pin 1 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...

Page 69: ...ives 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 i...

Page 70: ...ns 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 with adja cent contacts 5...

Page 71: ...h 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...

Page 72: ...00 3 650 92 71 840 005 21 34 315 010 8 00 001 002 dia 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 3...

Page 73: ...2 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 Pi...

Page 74: ...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...

Page 75: ...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...

Page 76: ...C 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...

Page 77: ...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...

Page 78: ...line See ANSI Standard X3T10 1302D for details electrical 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 circui...

Page 79: ...the SCSI device s logic ground reference Input characteristics shall additionally conform to EIA RS 485 983 Figure 25 Typical SE LVD alternative transmitter receiver circuits 9 7 1 1 Single ended driv...

Page 80: ...factory 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 impo...

Page 81: ...T14 4 5 7 1 39 s 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 Com...

Page 82: ...0 12 s MSG IN Byte Transfer T32 4 5 5 7 8 14 15 0 04 s MSG OUT Byte Transfer T33 4 5 2 0 04 s STATUS Byte Transfer T34 4 5 5 8 15 0 04 s Synchronous Data Transfer Characteristics Request Signal Trans...

Page 83: ...one phone you can obtain technical support information by return FAX 24 hours daily This service is available worldwide Presales Support Our Presales Support staff can help you determine which Seagate...

Page 84: ...matica 55 21 516 6649 FAX 55 21 223 3156 e mail sgt_cso gbl com br European Support Services For European customer support dial the toll free number for your specific country for presales support tech...

Page 85: ...y or send a FAX to 31 20 653 3513 The European call center is located in Amsterdam The Nether lands Asia Pacific Support Services Technical Support Australia 61 2 9725 3366 FAX 61 2 9725 4052 Hong Kon...

Page 86: ......

Page 87: ...bus device reset message 50 bytes per sector 48 bytes surface 9 bytes track 9 C cabinet cooling 42 cable 57 cache 10 11 12 cache buffer 7 cache miss 11 cache mode 10 cache operation 10 cache operation...

Page 88: ...37 drive primary defects list 35 drive SCSI timing 71 drive select header 57 drive spindle 41 drive transfer 11 drive volume 37 drive warranty 15 dynamic spindle brake 7 E ECC 13 ECC correction capabi...

Page 89: ...toresistive heads 5 mating connector 57 60 mating flat cable connector 60 maximum current requirements 22 maximum operating current 21 maximum starting current 21 ME jumper 41 mean time between failur...

Page 90: ...t 12 prefetch mode 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 electro...

Page 91: ...le 10 stop time 10 storage capacity 35 straight in connector 61 strict bit in Mode page 00h 11 supply voltage 21 support services 73 synchronous data transfer 57 synchronous data transfer operation 72...

Page 92: ...82 Cheetah 18XL Product Manual Rev A Z zoned bit recording ZBR 7...

Page 93: ......

Page 94: ...Seagate Technology Inc 920 Disc Drive Scotts Valley California 95066 4544 USA Publication Number 75789506 Rev A Printed in USA...

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