Page 2 - Contents
Contents Preface......................................................................................... 1Electrostatic discharge protection ................................................ 2Important safety information and precautions.............................. 3Wichtige Sicherheitshinweise ......
Page 3 - Preface; Note. Please contact Seagate technical support services or
Cheetah 4LP Installation Guide, Rev. B 1 Preface This manual contains information for users of the Seagate®Cheetah 4LP SCSI disc drives. It provides support services, per-formance specifications, and initial setup information. Additionalinformation is available in the Cheetah 4LP Product Manual (par...
Page 4 - Electrostatic discharge protection; Caution. Removal of circuit boards by personnel not perform-
2 Cheetah 4LP Installation Guide, Rev. B Electrostatic discharge protection Caution. Removal of circuit boards by personnel not perform- ing depot repair will damage components and mayvoid the warranty. All drive electronic assemblies are sensitive to static electricity,due to the electrostatically ...
Page 5 - Important safety information and precautions
Cheetah 4LP Installation Guide, Rev. B 3 Important safety information and precautions Caution. Use forced-air ventilation when bench-testing the drive to ensure proper cooling of drive components. Use proper safety techniques for safe, reliable operation of thisunit. The procedures in this manual an...
Page 7 - Wichtige Sicherheitshinweise; • Beachten Sie alle Warn- und Vorsichtshinweise in diesem
Cheetah 4LP Installation Guide, Rev. B 5 Wichtige Sicherheitshinweise Vorsicht. Beim Testen des Laufwerks auf dem Prüftisch istFremdbelüftung vorzusehen, um eine ausreichende Kühlung derLaufwerkkomponenten sicherzustellen. Verwenden Sie geeignete Sicherheits- um den sicheren, zuver-lässigen Betrieb ...
Page 10 - Regulatory agency compliance; • 486, Pentium, and PowerPC microprocessors
8 Cheetah 4LP Installation Guide, Rev. B Regulatory agency compliance Electromagnetic susceptibilityAs a component assembly, the drive is not required to meet anysusceptibility performance requirements. It is the responsibility ofthose integrating the drive within their systems to perform thosetests...
Page 12 - Seagate technical support services; drive or; Online services
10 Cheetah 4LP Installation Guide, Rev. B Seagate technical support services If you need assistance installing your drive, consult your dealer.Dealers are familiar with their unique system configurations andcan help you with system conflicts and other technical issues. Ifyou need additional assistan...
Page 13 - go; Location
Cheetah 4LP Installation Guide, Rev. B 11 Seagate CompuServe forumOnline technical support for Seagate products is available onCompuServe. To access our technical support forum, type go seagate. This forum provides information similar to that found onSeaBOARD. In addition, you can type questions or ...
Page 14 - FAX services
12 Cheetah 4LP Installation Guide, Rev. B FAX services SeaFAX®You can use a touch-tone telephone to access Seagate’s auto-mated FAX system to receive technical support information byreturn FAX. This service is available 24 hours daily. Seagate technical support FAXYou can FAX questions or comments t...
Page 15 - Direct-support services
Cheetah 4LP Installation Guide, Rev. B 13 Direct-support services Seagate technical supportFor one-on-one help, you can talk to a technical support special-ist during local business hours. Before calling, note your systemconfiguration and drive model number (ST xxxx). SeaTDD™ 405-936-1687Using a tel...
Page 16 - Customer service centers
14 Cheetah 4LP Installation Guide, Rev. B Customer service centers Seagate direct OEM, Distribution, and Systems Integrator cus-tomers should contact their Seagate service representative forwarranty information. Other customers should contact their placeof purchase. Seagate offers comprehensive cust...
Page 17 - General description; C h e e t a h 4 L P P r o d u c t M a n u a l ( p a r t n u m b e r; Figure 1. Cheetah 4LP family drive
Cheetah 4LP Installation Guide, Rev. B 15 General description Cheetah 4LP SCSI disc drives are high-speed, random-accessdigital-data storage devices. T h e d r i ve i s a c o m p o n e n t fo r i n s t a l l a t i o n i n a n e n c l o s u r edesigned for the drive. This is often a rack within the s...
Page 18 - Drive characteristics; Seek time
16 Cheetah 4LP Installation Guide, Rev. B Table 1. Drive characteristics Characteristics of the various drives covered by this manual aregiven in the following tables. Interface type: SCSI Fast-20 (also calledUltra SCSI 1 ) Cylinders (user accessable): 6,526 Disk rotation: 10,033 r/min ±0.5% Avg. la...
Page 19 - Additional drive characteristics; Legend for following table listing other drive characteristics:; Model
Cheetah 4LP Installation Guide, Rev. B 17 Table 1a. Additional drive characteristics Legend for following table listing other drive characteristics: A = capacity, unformatted, GbytesB = capacity, formatted, Gbytes 1 C = number of read/write data headsD = max. synchronous SCSI interface transfer rate...
Page 20 - Voltage regulation
18 Cheetah 4LP Installation Guide, Rev. B Table 2. DC power requirements (Amps) 1 Measured with an average reading DC ammeter. Instanta-neous +12V current peaks will exceed these values. 2 A –10% tolerance is permissible during initial start of the spin-dle but must return to ±5% before reaching 10,...
Page 21 - Dimensions of the drive; in; Height
Cheetah 4LP Installation Guide, Rev. B 19 5 See “Conducted noise immunity” in the Cheetah 4LP Product Manual. The specified voltage tolerance is inclusive of ripple,noise, and transient response. 6 At power-up, the motor current regulator limits the +12V cur-rent to an average value of less than val...
Page 22 - Initial setup information; Drive models; The following general information topics are discussed:
20 Cheetah 4LP Installation Guide, Rev. B Initial setup information The general information beginning on this page applies to all ofthe Cheetah 4LP drive models. After reading the general infor-mation topics, refer to the appropriate drive-specific sectionlisted below for additional information abou...
Page 23 - SCSI ID jumpers; Note. Most SCSI controllers (host adapters) allow you to skip a
Cheetah 4LP Installation Guide, Rev. B 21 SCSI ID jumpers Each device on the SCSI chain must have a unique SCSI ID.The host system’s SCSI controller usually uses the ID that hasthe highest priority interrupt in the SCSI I/O system. This isalways ID7. ID0 is lowest priority in an 8-bit I/O system. ID...
Page 24 - Drive termination; Note. Some controllers prefer to remain terminated even if they
22 Cheetah 4LP Installation Guide, Rev. B the case, change the ID so that each device on the SCSI chainhas its own unique ID. Also check your system or controlleruser’s manual to ensure that you have not violated its SCSI IDnumbering recommendations. Drive termination If you are installing a Cheetah...
Page 25 - SCSI bus termination; Terminator power; • “WD” and “DC” models use differential I/O circuits. You cannot
Cheetah 4LP Installation Guide, Rev. B 23 Figure 2. SCSI bus termination Terminator power You usually will not need to change this option and can normallyleave the drive configured as it was shipped from the factory. Forinformation about how to change the terminator power option onyour drive, refer ...
Page 26 - Cable characteristics for single-ended circuits
24 Cheetah 4LP Installation Guide, Rev. B Figures 3a, 3b, 3c, and 3d show typical drive connections. Thefollowing table lists the maximum cable lengths and number ofdevices with single-ended I/O circuits allowed on a daisy-chaincable for 5 and 20 Mbytes/sec I/O data transfer rates. 1 See system docu...
Page 28 - Figure 3c. Multiple drive connection to host adapter
26 Cheetah 4LP Installation Guide, Rev. B [1] “X” means up to 6 or the maximum allowable number of devices on the SCSI bus. See system documentation. Figure 3c. Multiple drive connection to host adapter Host Adapter PCB Pin 1 (check your adapter for Pin 1 location) “N” Model Drive SCSI ID 1 SCSI ID ...
Page 29 - Figure 3d. Multiple-drive connection to host adapter
Cheetah 4LP Installation Guide, Rev. B 27 [1] “X” means up to 15 or the maximum allowable number of devices on the SCSI bus. See system documentation and Table 4. [2] External terminator. Used only on end “WD” drive. Figure 3d. Multiple-drive connection to host adapter Host Adapter PCB Pin 1 (check ...
Page 30 - Note. This drive model plugs directly into a backplane connec-; tor and therefore uses no cables.; and power connector; Connector
28 Cheetah 4LP Installation Guide, Rev. B Note. This drive model plugs directly into a backplane connec- tor and therefore uses no cables. Figure 3e. Drive model “WC” or “DC” with single 80-pin I/O and power connector J2 J6 80-pin SCSI I/O Connector Pin 1
Page 31 - Providing adequate cooling
Cheetah 4LP Installation Guide, Rev. B 29 Providing adequate cooling The enclosure design must ensure adequate cooling for thedrive. The maximum ambient temperature is 50 ° C. The drive’s product manual (83329120) describes how to evalu-ate the air-flow design. The evaluation consists of ensuring th...
Page 32 - Kühlung des Systems
30 Cheetah 4LP Installation Guide, Rev. B Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichende Kühlung desLaufwer kes gewähr leis ten. Die Um gebungstemperatur darfmaximal 50 ° C betragen. Die Pr odukthandbuch C heet ah 4LP (Dokument 83329120)enthalten Anweisungen zur Beur teilung der L...
Page 34 - Mounting the drive and connecting cables
32 Cheetah 4LP Installation Guide, Rev. B Mounting the drive and connecting cables Do not touch the connector pins or any components on the con-trol board without observing static-discharge precautions.Always handle the drive by the frame only. The drive may be mounted in any orientation (horizontal...
Page 38 - Replace the host system’s cover.
36 Cheetah 4LP Installation Guide, Rev. B elektromagnetische Strahlung fällt in den Zuständigkeits-bereich des Systemdesigners. 5. Replace the host system’s cover. 5. Setzen Sie das Gehäuseoberteil des Host-Systems wiederauf.
Page 39 - Mounting configuration dimensions
Cheetah 4LP Installation Guide, Rev. B 37 Figure 6. Mounting configuration dimensions A F .050 in. (1.27mm)minimum clearance L D G E C [3] [1] B H M K J J2 [4] [2] J6 LED Mounting holes three on each side, 6-32 UNC. Max screw length into side of drive 0.15 in. (3.81 mm). Screw tightening torque 6.0 ...
Page 40 - Formatting the drive; Warning. Formatting a drive erases all user data. Be sure that; • DOS. Set the drive type in CMOS to “
38 Cheetah 4LP Installation Guide, Rev. B Formatting the drive Warning. Formatting a drive erases all user data. Be sure that you understand this principle before formatting anyhard disc drive. It is not necessary to format a drivethat previously has been used to store data, unlessyour intention is ...
Page 41 - Setting the SCSI ID on model “N” drives
Cheetah 4LP Installation Guide, Rev. B 39 N drives N drives sectionb Setting the SCSI ID jumpers Use the J6 connector to set the SCSI ID (see Figure 7). Tochange the SCSI ID, install jumpers on the appropriate pins asshown in the illustration. Figure 7. Setting the SCSI ID on model “N” drives J6 J2 ...
Page 42 - Terminating the drive
40 Cheetah 4LP Installation Guide, Rev. B N drives Terminating the drive “N” model drives are terminated with permanently mounted ICactive terminators. If you install one of these drives and it is noton the end of the SCSI bus, disable the terminators by removingthe jumper “TE” from pins 15 and 16 o...
Page 43 - Setting terminator power jumpers
Cheetah 4LP Installation Guide, Rev. B 41 N drives Terminator power There are three possible terminator power (TP) configurationsfor “N” model drives (see Figure 9). You will not normally need tochange this option and can leave the drive configured as it wasshipped from the factory. Figure 9. Settin...
Page 44 - Several other jumper options are available as illustrated.; Figure 10. Additional jumper options
42 Cheetah 4LP Installation Guide, Rev. B N drives Other applicable jumper options Several other jumper options are available as illustrated. Figure 10. Additional jumper options TE DS M E W P PD RES TP2 TP1 J2 SCSI I/O Connector DC PowerConnector J2 Pin 1 DriveFront J6 J1 Pin 1 Pin 2 J2 Jumper (enl...
Page 45 - Setting the SCSI ID jumpers; Figure 11. Setting the SCSI ID on model “W” and “WD”
Cheetah 4LP Installation Guide, Rev. B 43 W/WD drives W/WD drives section Setting the SCSI ID jumpers Use the J6 jumper block to set the SCSI ID (Figure 11). Tochange the SCSI ID, install jumpers on the appropriate pins asshown in the illustration. Optional connections to switching cir-cuits in host...
Page 48 - Figure 14. Setting terminator power jumpers
46 Cheetah 4LP Installation Guide, Rev. B W/WD drives Terminator power There are three possible terminator power (TP) configurationsfor “W” model drives (see Figure 14). You will not normally needto change this option and can leave the drive configured as itwas shipped from the factory. There are tw...
Page 49 - Other applicable jumper options; Other option jumpers are available as illustrated below.; Figure 15. Additional jumper options
Cheetah 4LP Installation Guide, Rev. B 47 W/WD drives Other applicable jumper options Other option jumpers are available as illustrated below. Figure 15. Additional jumper options TE DS M E W P PD RES TP2 TP1 J2 SCSI I/O Connector DC PowerConnector J2 Pin 1 DriveFront J6 J1 Pin 1 Pin 2 J2 Jumper (en...
Page 51 - Applicable jumper options; Option jumpers are available as illustrated below.; Figure 16. Jumper options
Cheetah 4LP Installation Guide, Rev. B 49 WC/DC drives Applicable jumper options Option jumpers are available as illustrated below. Figure 16. Jumper options Enable parity check of SCSI bus (default). Disable parity check. Parity Check option Write protect = Off (enables writing – default) Write pro...
Page 52 - The drive Active LED indicator connections are shown below.; Figure 17. Drive Active LED indicator connections
50 Cheetah 4LP Installation Guide, Rev. B All drives All drives (LED connections) Drive Active indicator The drive Active LED indicator connections are shown below. Figure 17. Drive Active LED indicator connections J6 Reserved Activity LED ReservedThe shaded pins are shipped with a cover installed. ...
