Page 2 - Contents
Contents Preface ..................................................................................... 1Electrostatic discharge protection ............................................ 1Important safety information and precautions .......................... 2Wichtige Sicherheitshinweise ................
Page 3 - Preface; Cheetah 18 Product Manual; Electrostatic discharge protection; Caution. Removal of circuit boards by personnel not perform-; • Ground yourself to the drive whenever the drive electronics
Cheetah 18 Installation Guide, Rev. A 1 Preface This manual contains information for users of the Seagate®Cheetah 18 SCSI disc drives. It provides support services, per-formance specifications, and initial setup information. Additionalinformation is available in the Cheetah 18 Product Manual (part n...
Page 4 - Important safety information and precautions
2 Cheetah 18 Installation Guide, Rev. A • Turn off the power before removing or installing the DC power cable. • Do not remove any circuit boards from the drive. • Never use an ohmmeter on any circuit boards. • When installing the drive on a carrier or tray, discharge the car- rier or tray prior to ...
Page 6 - Wichtige Sicherheitshinweise
4 Cheetah 18 Installation Guide, Rev. A This unit is a component part and as such is not meant to com-ply with FCC or similar national requirements as a stand-aloneunit. Engineering radiated emissions test results are availablethrough the Seagate Safety Department to assist the subsystemdesigner. Wi...
Page 9 - Regulatory agency compliance; • 486, Pentium, and PowerPC microprocessors
Cheetah 18 Installation Guide, Rev. A 7 magnetische Strahlung sind für Designer von Untersystemen aufAnfrage von der Seagate-Sicherheitsabteilung erhältlich. Regulatory agency compliance Electromagnetic susceptibilityAs a component assembly, the drive is not required to meet anysusceptibility perfor...
Page 11 - Seagate Technology support services; Presales support; Disc Drives; Note. You can purchase select tape products and tape acces-; Technical support services; drive or other
Cheetah 18 Installation Guide, Rev. A 9 Seagate Technology support services Presales support To determine which Seagate products are best suited for yourspecific application, contact us about configuration and compati-bility and for current product availability. You can leave a voicemessage after bu...
Page 12 - Online services; SeaNET; . This forum provides information similar to that found on; SeaBOARD®
10 Cheetah 18 Installation Guide, Rev. A asked questions, troubleshooting tips, and specifications for discdrives and tape drives. This service is available 24 hours dailyand requires a touch-tone phone. International callers can reachthis automated self-help service by dialing 405-936-1234. Online ...
Page 13 - FAX services; SeaFAX®
Cheetah 18 Installation Guide, Rev. A 11 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. Technical support FAX You can FAX questions or comments to techn...
Page 14 - Direct-support services; Technical support; xxxx; Location
12 Cheetah 18 Installation Guide, Rev. A Direct-support services Technical support For 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 ). Germany 49-89-1430-5100 Hong Kong 852-...
Page 15 - Customer service centers
Cheetah 18 Installation Guide, Rev. A 13 SeaTDD™ 405-936-1687 Using a telecommunications device for the deaf (TDD), you cansend questions or comments 24 hours daily and exchange mes-sages with a technical support specialist between 8:00 A . M . to 12:15 P . M . and 1:30 P . M . to 6:00 P . M . (cent...
Page 16 - Manufacturer’s representatives
14 Cheetah 18 Installation Guide, Rev. A Manufacturer’s representatives Brazil MA Informatica 55-21-516-6649 55-21-516-5280 Canada MemofixAdtech 905-660-4936905-812-80991-800-624-9857 905-660-8738905-812-7807 Mexico Abicom Seamax SA DE CV 525-546-4888 525-546-4888 Southern Europe Caesar Italia 39-68...
Page 17 - General description; contains guidelines for a properly designed enclosure.; Attention. This high performance Cheetah disc drive must have; proper power and cooling for reliable operation.
Cheetah 18 Installation Guide, Rev. A 15 General description Cheetah 18 SCSI disc drives are high-speed, random-accessdigital-data storage devices capable of operating in single-ended(SE) or low voltage differential (LVD) modes. These two modes are offered to allow you to use this drive insystems th...
Page 19 - Characteristics
Cheetah 18 Installation Guide, Rev. A 17 Characteristics ST118202LW/LC Interface Ultra2 SCSI 1 Capacity Unformatted (Gbytes)Formatted (Gbytes) 2 22.5418.21 Recording Cylinders (user)Read/write data headsAvg bytes/track 6,96224104,840-159,008 Access time 3 Average read (msec)Average write (msec) 5.96...
Page 21 - Initial setup information; Drive models; The following general information topics are discussed:
Cheetah 18 Installation Guide, Rev. A 19 Initial setup information The general information beginning on this page applies to all ofthe Cheetah 18 drive models. After reading the general informa-tion topics, refer to the appropriate drive-specific section listedbelow for additional information about ...
Page 22 - Single-ended and low voltage differential modes; Note. To operate at the Ultra2 SCSI rates in LVD mode, all; SCSI ID jumpers
20 Cheetah 18 Installation Guide, Rev. A Single-ended and low voltage differential modes This drive incorporates two different transceivers to allow you touse it in traditional systems which may use single-ended (SE)drivers and receivers, or to use it in low voltage differential (LVD)capable systems...
Page 23 - Note. Most SCSI controllers (host adapters) allow you to skip a
Cheetah 18 Installation Guide, Rev. A 21 Note. Most SCSI controllers (host adapters) allow you to skip a SCSI ID. For example, you can have ID0, ID1, and ID3(skipping ID2). Other controllers do not allow this so besure to refer to your system or controller user’s manualfor details about its requirem...
Page 24 - Drive termination; Note. Some controllers prefer to remain terminated even if they
22 Cheetah 18 Installation Guide, Rev. A Drive termination If you are installing a Cheetah drive in a system that has otherSCSI devices installed, terminate only the end devices on theSCSI chain. A SCSI “device” is any disc drive, scanner, tapebackup unit, or other piece of hardware connected to you...
Page 25 - SCSI bus termination; Terminator power; • These drives can be used in single-ended or low voltage differ-
Cheetah 18 Installation Guide, Rev. A 23 ing the bus at the backpanel. For ST118202LW drives, use an in-line terminator on the cable. 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 ...
Page 26 - Cable characteristics for SE and LVD circuits; LVD
24 Cheetah 18 Installation Guide, Rev. A can use these wide drives on a standard (non-wide) 8-bit databus if you provide proper termination to the upper 8-bit datalines. This is often referred to as providing “high-9 termina-tion.” Figures 3, 4, and 5 show typical drive connections. The following ta...
Page 28 - Multiple-drive connection to host adapter
26 Cheetah 18 Installation Guide, Rev. A [1] “X” means up to 15 or the maximum allowable number of devices on the SCSI bus. See system documentation and Table 1. [2] External terminator. Used only on end “LW” drive. Use only SPI-2- compliant active LVD terminators on SCSI Ultra2 buses. Figure 5. Mul...
Page 29 - Note. This drive model plugs directly into a backplane connec-; tor and therefore does not use cables.; Connector
Cheetah 18 Installation Guide, Rev. A 27 Note. This drive model plugs directly into a backplane connec- tor and therefore does not use cables. Figure 6. Drive model “LC” with single 80-pin I/O andpower connector J6 80-pin SCSI I/O Connector Pin 1 J2
Page 30 - Providing adequate cooling
28 Cheetah 18 Installation Guide, Rev. A Providing adequate cooling The enclosure design must ensure adequate cooling for thedrive. The maximum ambient temperature allowed is 50 ° C. The drive’s product manual (83329260) describes how to evalu-ate the air-flow design. The evaluation consists of ensu...
Page 31 - Kühlung des Systems
Cheetah 18 Installation Guide, Rev. A 29 Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichende Kühlung desLaufwerkes gewährleisten. Die Umgebungstemperatur darf max-imal 50 ° C betragen. D i e P r o d u kt h a n d bu c h C h e e ta h 1 8 ( D o k u m e n t 8 3 3 2 9 2 6 0)enthalten Anweis...
Page 33 - Mounting the drive and connecting cables
Cheetah 18 Installation Guide, Rev. A 31 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 (horizontall...
Page 35 - Pin
Cheetah 18 Installation Guide, Rev. A 33 defined in IEC 950. Figure 8 provides the pin information forthe DC power connector. To connect the DC power cable tothe drive, simply insert the cable end into the drive’s DCpower connector. 4. Schließen Sie das SCSI-Kabel an den SCSI-Steckverbinderdes Lau f...
Page 36 - Note. Signal ground on the power control board assembly
34 Cheetah 18 Installation Guide, Rev. A Note. Signal ground on the power control board assembly (PCBA) and the head and disc assembly (HDA) are con-nected together in this drive and you cannot separatethem. The equipment in which you have mounted thedrive is connected directly to the HDA and PCBA w...
Page 37 - Replace the host system’s cover.
Cheetah 18 Installation Guide, Rev. A 35 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 38 - Mounting configuration dimensions (LW model)
36 Cheetah 18 Installation Guide, Rev. A Figure 9. Mounting configuration dimensions (LW model) 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 f...
Page 40 - Formatting the drive; Warning. Formatting a drive erases all user data. Be sure that; • Hardware platform, operating system, and host adapter varia-; No hard drive installed; • Macintosh. Use a third-party drive utility or Apple’s Drive Setup
38 Cheetah 18 Installation Guide, Rev. A 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 t...
Page 43 - Figure 12. Setting terminator power jumpers
Cheetah 18 Installation Guide, Rev. A 41 LW drives Terminator power You can configure this drive to supply termination power to theSCSI bus by placing a jumper on J2 pins 1 and 2. The defaultsetting is no jumper, meaning that some other source (other thanthis drive) is suppling termination power to ...
Page 44 - Several other jumper options are available as illustrated.
42 Cheetah 18 Installation Guide, Rev. A LW drives Other applicable jumper options Several other jumper options are available as illustrated. SE DS M E W P PD RES RES TP J2 Pin 1 Pin 2 Enable parity check of SCSI bus (default). Disable parity check. Reserved Parity Check option Write protect = Off (...
Page 45 - LW drives; Figure 13. Additional jumper options
Cheetah 18 Installation Guide, Rev. A 43 LW drives Figure 13. Additional jumper options Figure 14. Alternate ID select and LED connection SCSI ID = 0 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 SCS...
Page 46 - The drive Active LED indicator connections are shown below.; Figure 15. Drive Active LED indicator connections
44 Cheetah 18 Installation Guide, Rev. A LW drives Drive Active indicator The drive Active LED indicator connections are shown below. Figure 15. Drive Active LED indicator connections Jumper Plug (enlarged toshow detail) DriveFront J6 Reserved Activity LED ReservedThe shaded pins are shipped with a ...
Page 49 - Other option jumpers are available as illustrated below.; Figure 17. Additional jumper options
Cheetah 18 Installation Guide, Rev. A 47 LC drives Other applicable jumper options Other option jumpers are available as illustrated below. Figure 17. Additional jumper options SE DS M E W P PD RES RES RES J2 Pin 1 Pin 2 Enable parity check of SCSI bus (default). Disable parity check. Reserved Parit...
Page 50 - Figure 18. Drive Active LED indicator connections
48 Cheetah 18 Installation Guide, Rev. A LC drives WC/DC drives section Drive Active indicator The drive Active LED indicator connections are shown below. Figure 18. Drive Active LED indicator connections Jumper Plug (enlarged toshow detail) DriveFront J6 Reserved Activity LED ReservedThe shaded pin...
