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Cheetah 18 Family:
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ST118202LW/LC
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Product Manual, Volume 1
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Summary of Contents for Seagate ST118202LW
- Page 1 ..........ST118202LW/LC .
- Page 3 ..........ST118202LW/LC .
- Page 4 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology, Inc. Cheetah, SeaFAX, SeaFONE, 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 respective owners.
- Page 5 Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A 05/19/98 L. Newman/J. Nowitzke 1/1, v thru viii, 1-69 Rev. B 08/14/98 L. Newman/J. Nowitzke Add Multimode signal input and output characteristics to Section 9. Notice. Product Manual 83329260 is Volume 1 of a two volume document with the SCSI Interface information in the Volume 2 SCSI Interface Product Manual, part number 77738479.
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Page 7: Table Of Contents
Cheetah 18 Product Manual, Rev. B Contents Scope ................1 Applicable standards and reference documentation. - Page 8 Seagate technical support services ........
- Page 9 Cheetah 18 family drive (ST118202LW shown) ........
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Page 11: Scope
Cheetah 18 Product Manual, Rev. B Scope This manual describes Seagate Technology®, Inc. Cheetah 18™ disc drives. Cheetah 18 drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI- 2, and SCSI-3 (Fast-20 and Fast-40) interface specifications to the extent described in this manual. The SCSI Interface Product Manual (part number 77738479) describes general SCSI interface characteristics of this and other families of Seagate drives. -
Page 13: Applicable Standards And Reference Documentation
Mounting by bottom holes must meet the requirements of Section 8.4. Standards The Cheetah 18 family complies with Seagate standards as noted in the appropriate sections of this Manual and the Seagate SCSI Interface Product Manual , part number 77738479 (Vol. 2). -
Page 14: Reference Documents
SFF-8046 Specification for 80-pin connector for SCSI disk drives SCA-2 EIA Specification ANSI/EIA 68-pin EIA # 3652 Package Test Specification Seagate P/N 30190-001 (under 100 lb.) Package Test Specification Seagate P/N 30191-001 (over 100 lb.) Specification, Acoustic Test Requirements, and Procedures Seagate P/N 30553-001... -
Page 15: General Description
Cheetah 18 family of drives, and the SCSI Interface Product Manual (volume 2), part number 77738479, 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). -
Page 16: Figure 2. Cheetah 18 Family Drive
Cheetah 18 Product Manual, Rev. B Figure 2. Cheetah 18 family drive... -
Page 17: Standard Features
Cheetah 18 Product Manual, Rev. B Standard features The Cheetah 18 family has the following standard features: • Integrated Ultra/Ultra2 SCSI controller • Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD) • 16 bit I/O data bus •... -
Page 18: Unformatted And Formatted Capacities
Cheetah 18 Product Manual, Rev. B Unformatted and formatted capacities Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows the standard OEM model capacities: Formatted data block size 512 bytes/sector [1] Unformatted ST118202... -
Page 19: Performance Characteristics
Cheetah 18 Product Manual, Rev. B Performance characteristics Internal drive characteristics (transparent to user) ST118202 Drive capacity 18.210 GByte (formatted, rounded off values) Read/write heads Bytes/track 104,840–159,008 Bytes (average, rounded off values) Mbytes/surface Mbytes (unformatted, rounded off values) Tracks/surface (total) 6,962 Tracks (user accessible) Tracks/inch... -
Page 20: Start/Stop Time
Cheetah 18 Product Manual, Rev. B Sector Sizes: Default 512 byte user data blocks Variable 180 to 4,096 bytes per sector in even number of bytes per sector. If n (number of bytes per sector) is odd, then n-1 will be used. Read/write consecutive sectors on a track Flaw reallocation performance impact (for flaws reallocated at format time using Negligible... -
Page 21: Caching Write Data
Cheetah 18 Product Manual, Rev. B tains a table of logical block disk medium addresses of the data stored in each segment of the buffer. If cache operation is enabled (RCD bit = 0 in Mode Page 08h, byte 2, bit 0. See SCSI Interface Product Manual, part number 77738479), data requested by the host with a Read command is retrieved from the buffer (if it is there), before any disc access is initiated. -
Page 22: Prefetch Operation
Cheetah 18 Product Manual, Rev. B while writing the data to the medium, and GOOD status has already been returned, a deferred error will be generated. The Synchronize Cache command may be used to force the drive to write all cached write data to the medium. Upon completion of a Synchronize Cache command, all data received from previous write commands will have been written to the medium. -
Page 23: Reliability Specifications
Cheetah 18 Product Manual, Rev. B Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4). Seek Errors Less than 10 in 10 seeks Read Error Rates [1] Recovered Data... -
Page 24: Reliability And Service
Cheetah 18 Product Manual, Rev. B unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Refer to Section 5.1.1.2 of the SCSI Interface Product Manual, part number 77738479, for Request Sense information. Reliability and service You can enhance the reliability of Cheetah 18 disc drives by ensuring that the drive receives adequate cooling. Section 6.0 provides temperature measurements and other information that may be used to enhance the ser- vice life of the drive. -
Page 25: Preventive Maintenance
Case 4 - Current I/O process allowed during insertion or removal, except on the device being changed Seagate Cheetah 18 disc drives support all four hot plugging cases. Provision shall be made by the system such that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus. -
Page 26: S.m.a.r.t
Cheetah 18 Product Manual, Rev. B 5.2.8 S.M.A.R.T. S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions that indicate a drive failure and is designed to provide sufficient warning of a failure to allow data back-up before an actual failure occurs. -
Page 27: Product Warranty
Seagate’s option and at no charge to customer, if returned by customer at cus- tomer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty procedure. Seagate will pay for transporting the repair or replacement item to customer. -
Page 29: Physical/Electrical Specifications
Cheetah 18 Product Manual, Rev. B Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Cheetah 18 drive. AC power requirements None. DC power requirements The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector. -
Page 30: Conducted Noise Immunity
Cheetah 18 Product Manual, Rev. B 6.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak to peak measurements and apply at the drive power con- nector. -
Page 31: Power Dissipation
Cheetah 18 Product Manual, Rev. B Power dissipation For drives using single-ended interface circuits, typical operating random read power dissipation is 18.7 watts (64 BTUs per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 15.4 watts (52.7 BTUs per hour). -
Page 32: Relative Humidity
Non-operating –40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive. HDA Temp. -
Page 33: Shock And Vibration
36 in (914 mm) Drives packaged 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... -
Page 34: Figure 5. Recommended Mounting
Cheetah 18 Product Manual, Rev. B Figure 5. Recommended mounting... -
Page 35: Vibration
Cheetah 18 Product Manual, Rev. B 6.4.4.2 Vibration a. Operating - normal The drive as installed for normal operation, shall comply with the complete specified performance while subjected to continuous vibration not exceeding 5-350 Hz @ 0.5 G Vibration may be applied in the X, Y, or Z axis. b. -
Page 36: Mechanical Specifications
1.750 .010 44.45 1.625 .020 41.28 1.122 .020 28.50 4.000 .010 101.60 .250 .010 6.35 1.638 .010 41.60 .181 .020 4.60 1.625 .020 41.28 .265 .010 6.73 .315 .040 7.00 .015 0.38 .015 0.38 Figure 6. ST118202LW mounting configuration dimensions... -
Page 37: Figure 7. St118202Lc Mounting Configuration Dimensions
Cheetah 18 Product Manual, Rev. B Notes: -Z- -X- 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 6.0 in-lb (3.32 nm) with minimum full thread engagement of 0.12 in. -
Page 39: Defect And Error Management
Cheetah 18 Product Manual, Rev. B Defect and error management The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of defect management routines by the host (initiator). Defect and error management in the SCSI system involves the drive internal defect/error management and SCSI systems error considerations (errors in communications between Initiator and the drive). -
Page 40: Scsi Systems Errors
Cheetah 18 Product Manual, Rev. B Table 4: Read and write retry count maximum recovery times [1] Read retry Maximum recovery time per Write retry Maximum recovery time per count [1] LBA (cumulative, msec) count LBA (cumulative, msec) 65.7 35.8 77.6 53.7 89.6... -
Page 41: Installation
J2, J5-Auxiliary and J6. Suggested part number for the jumpers used on J2 is Molex 52747-0211 (Seagate part number 77679052). A bag with the two jumper plug types is shipped with the standard OEM drives. -
Page 42: Figure 8. J6 Jumper Header
Cheetah 18 Product Manual, Rev. B Drive Front Jumper Plug (enlarged to show detail) Pin 1 Reserved A 2 A 1 A 0 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6... -
Page 43: Figure 9. J5 Jumper Header (On Lw Models Only)
Cheetah 18 Product Manual, Rev. B Drive HDA (rear view, PCB facing downward) [1] [2] Pin 1 +5V Ground Pin 1 J1-DC Power 68 Pin SCSI ID = 0 (default) SCSI I/O Connector SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5... -
Page 44: Notes For Figures 8, 9, And 10
Cheetah 18 Product Manual, Rev. B Pin 1 Jumper Positions Force single-ended bus mode Delay Motor Start Enable Remote Motor Start Write Protect Parity Disable Reserved Additional notes on these (applies to “LW” model only; Term. Power to SCSI Bus functions in section 8.1.2. -
Page 45: Function Description
Cheetah 18 Product Manual, Rev. B 8.1.2 Function description jumper installation Jumper function description Forces drive to use single-ended I/O drivers/receivers only. Drive can operate on the interface in low voltage differential mode or single-ended, depend- ing on the voltage state of the I/O “DIFFSNS” line. Default is SE jumper not installed. Spindle starts immediately after power up - Default setting. -
Page 46: Drive Orientation
Cheetah 18 Product Manual, Rev. B Drive orientation The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive perfor- mance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, and these are the two preferred mounting orientations. -
Page 47: Drive Mounting
(F) is applied to the fourth point. Note. Before mounting the drive in any kind of 3.5-inch 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. -
Page 49: Interface Requirements
Seagate declares that the drives operate in accordance with the appropriate ANSI Standards referenced in various places herein, with excep- tions as noted herein or in the Seagate SCSI Interface Product Manual , part number 77738479. -
Page 50: Scsi Interface Commands Supported
Cheetah 18 Product Manual, Rev. B SCSI interface commands supported Table 6 following lists the SCSI interface commands that are supported in the SCSI-2, and SCSI-3 modes of the drive. Family drives can be changed back and forth between SCSI-1 and SCSI-2/SCSI-3 modes using the Change Definition Command. - Page 51 Cheetah 18 Product Manual, Rev. B Table 6: Commands supported by family drive (Continued) Command Supported by Command name code SCSI-2/3 Format page (03h) Information exceptions control page (1Ch) Notch and Partition Page (0Ch) Power condition page (1Ah) Rigid disc drive geometry page (04h) Unit attention page (00h) Verify error recovery page (07h) Xor Control page (10h)
- Page 52 Cheetah 18 Product Manual, Rev. B Table 6: Commands supported by family drive (Continued) Command Supported by Command name code SCSI-2/3 Verify BYTCHK bit Write Write and verify DPO bit Write buffer (modes 0, 2, supported) Firmware download option (modes 5, 7 supported) [3] Write extended DPO bit FUA bit...
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Page 53: Inquiry Vital Product Data
Cheetah 18 Product Manual, Rev. B Table 7 lists the Standard Inquiry command data that the drive should return to the initiator per the format given in the SCSI Interface Product Manual, part number 77738479, Section 5.1.1.3. Table 7: Cheetah 18 family drive Standard Inquiry data Bytes Data (HEX) 0-15... -
Page 54: Mode Sense Data
Cheetah 18 Product Manual, Rev. B 9.3.2 Mode Sense data The Mode Sense command provides a means for the drive to report its operating parameters to the initiator. The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and Change- able values. - Page 55 Cheetah 18 Product Manual, Rev. B The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com- mand pages for SCSI-2/SCSI-3 implementation (see the SCSI Interface Product Manual , part number 77738479).
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Page 56: Scsi Bus Conditions And Miscellaneous Features Supported
Cheetah 18 Product Manual, Rev. B SCSI bus conditions and miscellaneous features supported Asynchronous SCSI bus conditions supported by the drive are listed below. These conditions cause the SCSI device to perform certain actions and can alter the SCSI bus phase sequence. Other miscellaneous operating features supported are also listed here. -
Page 57: Synchronous Data Transfer
DC cable and connector ST118202LW drives receive DC power through a 4 pin connector (see Figure 14 for pin assignment) mounted at the rear of the main PCBA. Recommended part numbers of the mating connector are listed below, but equiv- alent parts may be used. -
Page 58: Figure 12. St118202Lw Drive Physical Interface (68-Pin J1 Scsi I/O Connector)
J1-DC Power Pin 1P Pin 1A Pin 1 68 Pin SCSI I/O Connector Figure 12. ST118202LW drive physical interface (68-pin J1 SCSI I/O connector) 80-pin SCSI I/O Connector Pin 1 Figure 13. ST118202LC drive physical interface (80-pin J1 SCSI I/O connector) -
Page 59: Scsi Interface Physical Description
Cheetah 18 Product Manual, Rev. B 9.6.2 SCSI interface physical description The drive models described by this product manual support the physical interface requirements of the SCSI-3 Parallel Interface-2 (SPI-2) standards as defined in American National Standard document X3T10/1142D revi- sion 14, and operate compatibly at the interface with devices that support earlier SCSI-2 and SCSI-3 stan- dards. -
Page 60: Mating Connectors
Cheetah 18 Product Manual, Rev. B Proper impedance matching is especially important in order to maintain adequate margin at FAST-20 and FAST-40 SCSI transfer rates. The 80-pin connector option is intended for use on drives that plug directly into backplane connector in the host equipment. -
Page 61: Figure 14. Scsi Daisy Chain Interface Cabling Lw Drives
Cheetah 18 Product Manual, Rev. B Recommended mating 80-position PCBA mount connectors: Straight-in connector Hot plug version (with ground guide-pin) Seagate P/N: 77678703 Amp US P/N: 2-557103-1 787311-1 with polarization 94-0680-02-1 Amp US P/N: 2-557103-2 787311-2 without polarization 94-0680-02-2 Amp Japan P/N: 5-175475-9... -
Page 62: Figure 15. Nonshielded 68 Pin Scsi Device Connector Used On Lw Drives
Cheetah 18 Product Manual, Rev. B 3.650 .005 .346 .270 . 1 55 1.650 .3937 .600 .050 .0787 .200 .022 .020 .047 (15.24) .519 (13.18) (5.08) .100 Pos. 1.816 .315 .085 (2.54) (46.13) Pos. Position 1 x 45 chamfer (8.00) (2.16) .315 .010... -
Page 63: Figure 16. Nonshielded 80 Pin Scsi "Sca-2" Connector, Used On Lc Drives
Cheetah 18 Product Manual, Rev. B 7.00 (.276) 12.70 End View (.500) Grounding Pins 2.15 0.10 2 places 57.87 (2.278) –0.15 + .000 – .006 0.15 M Y M C L of Datum Y –Y– Front View Pin 1 62.15 0.15 (2.447) ( .005) - Page 64 Cheetah 18 Product Manual, Rev. B Table 12: LW 68-conductor single-ended (SE) P cable signal/pin assignments [13] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Connector Signal contact contact Signal name [1] number [3] number [3] name [1] –DB12...
- Page 65 Cheetah 18 Product Manual, Rev. B Table 13: LW 68-conductor LVD P cable signal/pin assignments [13] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Connector Signal contact contact Signal name [1] number [3] number [3] name [1] +DB12...
- Page 66 Cheetah 18 Product Manual, Rev. B Table 14: LC 80-pin single-ended (SE) I/O connector pin assignments [13] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact Signal Contact name [1] number [3] number [3] name[1] 12 V CHARGE...
- Page 67 Cheetah 18 Product Manual, Rev. B Table 15: LC 80-pin single-ended (LVD) I/O connector pin assignments [13] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact Signal Contact name [1] number [3] number [3] name[1] 12 V CHARGE...
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Page 68: Electrical Description
Cheetah 18 Product Manual, Rev. B Notes [ ] for Tables 12 through 15. See Section 9.6.4.1 for detailed electrical characteristics of these signals. The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat ribbon cable. Other cables types may be used to implement equivalent contact assignments. Connector contacts are on 0.050 inch (1.27 mm) centers. -
Page 69: Figure 17. Lvd Output Signals
Cheetah 18 Product Manual, Rev. B Steady state Low level output voltage* = –.95 V = < V = < –1.55 V (signal negation/logic 0) Steady state High level output voltage* = –.95 V = < V = < 1.55 V (signal assertion/logic 1) Differential voltage = +0.6 V minimum with common-mode voltage ranges 0.700 V = <... -
Page 70: Single-Ended Drivers/Receivers
SCSI transfer rates. Terminator requirements Caution: ST118202LW and ST118202LC drives do not have onboard internal terminators. The user, sys- tems integrator or host equipment manufacturer must provide a terminator arrangement external to the drive when termination is required. -
Page 71: Disc Drive Scsi Timing
Cheetah 18 Product Manual, Rev. B 9.10 Disc drive SCSI timing Table 17: Disc drive SCSI timing These values are not current values, but are listed for information only. Waveform Waveform Description symbol [1] table [1] Typical timing Target Select Time (no Arbitration) <1 s Target Select Time (with Arbitration) 4.5-1,2... - Page 72 Cheetah 18 Product Manual, Rev. B Table 17: Disc drive SCSI timing (Continued) These values are not current values, but are listed for information only. Waveform Waveform Description symbol [1] table [1] Typical timing Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.12 s ±1 s...
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Page 73: Seagate Technical Support Services
Online services Using a modem, you can obtain troubleshooting tips, free utility programs, drive specifications and jumper set- tings for Seagate’s entire product line. You can also download software for installing and analyzing your drive. SeaNET You can obtain technical information about Seagate products over the Internet from Seagate’s World Wide Web home page (http://www.seagate.com) or Seagate’s ftp server (ftp://ftp.seagate.com). - Page 74 Cheetah 18 Product Manual, Rev. B FAX services ® SeaFAX You can use a touch-tone telephone to access Seagate’s automated FAX system to receive technical support information by return FAX. This service is available 24 hours daily. Location Phone number...
- Page 75 Cheetah 18 Product Manual, Rev. B Customer service centers Seagate direct OEM, Distribution, and Systems Integrator customers should contact their Seagate service rep- resentative for warranty information. Other customers should contact their place of purchase. Seagate offers comprehensive customer support for all Seagate drives. These services are available worldwide.
- Page 77 Cheetah 18 Product Manual, Rev. B Index bytes/track 9 Symbols cabinet cooling 36 cable 47 +5 and +12 volt supplies 19 cache 10 Numerics cache buffer 7 cache miss 11 68 conductor connector 50 cache mode 10 68-pin connector 51 cache operation 10 80 conductor connector 50 cache operation hit 12...
- Page 78 Cheetah 18 Product Manual, Rev. B DC power carrying conductor 50 electromagnetic compatibility 3 DC power connector 47 electromagnetic interference (EMI) 13 DC power requirements 19 electromagnetic susceptibility 25 DC power source 50 embedded servo 7 dedicated landing zone 5 EMC compliance 3 default 34 EMI requirements 3...
- Page 79 Cheetah 18 Product Manual, Rev. B adapter/initiator 51 maximum starting current 19 host backplane wiring 49 ME jumper 35 host equipment 37 mean time between failure. See MTBF DC power 50 media 7 host I/O signal 31 media defect 13 host system 31 media defect induced error 13 host system malfunction 13...
- Page 80 Cheetah 18 Product Manual, Rev. B option select header 47 PRML read channel electronics 5 option select jumper 31 product data page 43 options 8 programmable drive capacity 8 orientation 10 out-of-plane deflection 37 out-of-plane distortion 37 radio interference regulations 3 Output characteristics 58 read 11 overhead time 10...
- Page 81 13 SCSI-1 mode 40 SCSI-2/SCSI-3 45 SCSI-2/SCSI-3 mode 40 technical support services 63 SE 58 temperature 10 Seagate support service 31 ambient 21 sector 11 case 21 sector interleave 9 gradient 21 sector size 8 non-operating 22...
- Page 82 Cheetah 18 Product Manual, Rev. B write retry count 29 zoned bit recording (ZBR) 7...
- Page 84 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 83329260, Rev. B, Printed in USA...
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