Page 2 - Contents; Seagate, Seagate Technology, and the Seagate logo are regis-
Contents Preface ........................................................................................ 1Electrostatic discharge protection ................................................ 1Important safety information and precautions.............................. 2Wichtige Sicherheitshinweise ......
Page 3 - Preface; Elite 23 Product Manual; Electrostatic discharge protection; Caution. Removal of circuit boards by personnel not perform-; • Ground yourself to the drive whenever the drive electronics
Elite 23 Installation Guide, Rev. A 1 Preface This manual contains information for users of the Seagate®ST423451 Elite 23 SCSI disc drives. It provides support ser-vices, performance specifications, and initial setup information.Additional information is available in the Elite 23 Product Manual (par...
Page 4 - Important safety information and precautions
2 Elite 23 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 carrier or tray prior to inse...
Page 6 - Wichtige Sicherheitshinweise
4 Elite 23 Installation Guide, Rev. A through the Seagate Safety Department to assist the subsystemdesigner. Wichtige Sicherheitshinweise Vorsicht. Beim Testen des Laufwerks auf dem Prüftisch istFremdbelüftung vorzusehen, um eine ausreichende Kühlung derLaufwerkkomponenten sicherzustellen. Verwenden...
Page 8 - European Union Compliance
6 Elite 23 Installation Guide, Rev. A digen hat eine Beschädigung der Komponenten undErlöschen des Garantieanspruchs zur Folge. Als Teilkomponente ist dieses Laufwerk für die Installation undden Betrieb in Übereinstimmung mit UL 1950, EN60950, CSAC22.2 950-M89 und VDE0805 vorgesehen. S e a g a t e i...
Page 10 - Technical support services; Seagate Technology Online services
8 Elite 23 Installation Guide, Rev. A 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 assistance with your...
Page 11 - BBS Location
Elite 23 Installation Guide, Rev. A 9 SeaBOARDSeaBOARD is a computer bulletin board system that containsinformation about Seagate Technology disc and tape drive prod-ucts and is available 24 hours daily. Set your communicationssoftware to eight data bits, no parity, and one stop bit (8-N-1).SeaBOARD...
Page 12 - Seagate Technology FAX services; Location
10 Elite 23 Installation Guide, Rev. A Seagate Technology FAX services SeaFAXYou 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 question...
Page 14 - General description; Elite 23 Product Manual; contains guidelines for a properly designed enclosure.
12 Elite 23 Installation Guide, Rev. A General description Elite 23 SCSI disc drives are high-speed, random-access digital-data storage devices. T h e d ri v e i s a c o m p o n e n t f o r i n s t a l l a ti o n i n a n e n c l o s u redesigned for the drive. This is often a rack within the system ...
Page 15 - Drive characteristics
Elite 23 Installation Guide, Rev. A 13 Table 1: Drive characteristics Interface UltraSCSI 1 Capacity Unformatted 29.6 Gbytes Formatted 2 23.4 Gbytes Recording Cylinders (user) 6,880 Read/write data heads 28 Servo heads Embedded Seek time (typical) 3 Average read 13.2 msec Average write 14.2 msec Dis...
Page 17 - Height
Elite 23 Installation Guide, Rev. A 15 6 At power-up, the motor current regulator limits the +12V cur-rent to an average value of less than 4.8A, although instanta-neous peaks may exceed this value. These peaks shouldmeasure 5 msec duration or less. 7 Minimum current loading for each supply voltage ...
Page 18 - Initial setup information; Drive models
16 Elite 23 Installation Guide, Rev. A Initial setup information The general information beginning on this page applies to all ofthe Elite 23 drive models. After reading the general informationtopics, refer to the appropriate drive-specific section listed belowfor additional information about config...
Page 19 - SCSI ID jumpers; Note. Most SCSI controllers (host adapters) allow you to skip a
Elite 23 Installation Guide, Rev. A 17 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. ID8 i...
Page 20 - Drive termination; Note. Some controllers prefer to remain terminated even if they
18 Elite 23 Installation Guide, Rev. A 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 Elite 23 d...
Page 21 - SCSI bus termination; Terminator power; • WD models use differential I/O circuits. You cannot mix these
Elite 23 Installation Guide, Rev. A 19 For information about how to terminate your drive, refer to theappropriate drive-specific section. 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 ...
Page 22 - Cable characteristics for single-ended circuits
20 Elite 23 Installation Guide, Rev. A 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 documen...
Page 23 - Sixty-eight pin connection to drive
Elite 23 Installation Guide, Rev. A 21 Figure 3a. Fifty-pin I/O connection to drive Figure 3b. Sixty-eight pin connection to drive
Page 24 - Multiple drive connection to host adapter
22 Elite 23 Installation Guide, Rev. A 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 X (or last drive) *“X” means up to ID6 or the maximum allowable number of devices on the SCSI bus. See Table 1...
Page 25 - Multiple-drive connection to host adapter
Elite 23 Installation Guide, Rev. A 23 Figure 3d. Multiple-drive connection to host adapter Host Adapter PCB Pin 1 (check your adapter for Pin 1 location) “W” Model Drive “WD” Model Drive SCSI ID 1 *SCSI ID X (or last drive) *“X” means up to ID15 or the maximum allowable number of devices on the SCS...
Page 26 - Providing adequate cooling
24 Elite 23 Installation Guide, Rev. A Providing adequate cooling The enclosure design must ensure adequate cooling for thedrive. The maximum ambient temperature is 50 ° C. The drive’s product manual (83329140) describes how to evalu-ate the air-flow design. The evaluation consists of ensuring thatt...
Page 27 - Kühlung des Systems
Elite 23 Installation Guide, Rev. A 25 Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichende Kühlung desL aufw erk es g ew ährl e i sten . Di e U m ge bun gste mp era tur da rfmaximal 50 ° C betragen. Die Produkthandbuch Elite 23 (Dokument 83329140) enthaltenAnwei sungen zur Beurteilung ...
Page 29 - Mounting the drive and connecting cables
Elite 23 Installation Guide, Rev. A 27 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 (horizontally,...
Page 31 - Pin
Elite 23 Installation Guide, Rev. A 29 defined in IEC 950. Figure 5 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-Steckverbinderd es L aufw...
Page 32 - Note. Signal ground on the printed circuit board assembly
30 Elite 23 Installation Guide, Rev. A Note. Signal ground on the printed circuit board assembly (PCB) and the head and disc assembly (HDA) are con-nected together in this drive and you cannot separatethem. Ensure the equipment in which you have mountedthe drive is connected directly to the HDA. Max...
Page 33 - Replace the host system’s cover.
Elite 23 Installation Guide, Rev. A 31 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 34 - Mounting configuration dimensions
32 Elite 23 Installation Guide, Rev. A Figure 6. Mounting configuration dimensions L J K H G F A E [2] D B C [4] [1] [3] Inches Millimeters 8.0005.7502.8752.9503.1200.8605.5000.1253.1202.9503.240 203.20 145.05 73.02 54.93 79.25 21.84 139.70 2.17 79.24 74.93 82.30 ABCDEF GH J K L 0.0100.0100.0100.020...
Page 35 - Formatting the drive; Warning. Formatting a drive erases all user data. Be sure that; • DOS. Set the drive type in CMOS to “; hard drive installed; • Macintosh. Use a third-party drive utility (Apple’s HD Setup
Elite 23 Installation Guide, Rev. A 33 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 to ...
Page 36 - Setting the SCSI ID on N models
34 Elite 23 Installation Guide, Rev. A N drives N/ND drives section Setting the SCSI ID jumpers Use the J4A connector to set the SCSI ID (see Figure 7) onmodel ST423451N. To change the SCSI ID, install jumpers onthe appropriate pins as shown in the illustration. Figure 7. Setting the SCSI ID on N mo...
Page 37 - Terminating the drive
Elite 23 Installation Guide, Rev. A 35 N drives Terminating the drive ST423451N 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 TE jumper from pins 19 and 20 of con...
Page 38 - Internal terminator power source.
36 Elite 23 Installation Guide, Rev. A N drives Terminator power There are three possible terminator power configurations forST423451N 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. Setting termin...
Page 39 - Additional jumper options
Elite 23 Installation Guide, Rev. A 37 N drives Other applicable jumper options Several other jumper options are available as illustrated in Fig-ure 10. Figure 10. Additional jumper options Immediate spinup (if the Start Command option jumper is disconnected)Spinup delay equal to the SCSI Bus IDmult...
Page 40 - Setting the SCSI ID jumpers; Setting the SCSI ID on W/WD models
38 Elite 23 Installation Guide, Rev. A W/WD drives W/WD drives section Setting the SCSI ID jumpers Use the J4A jumper block to set the SCSI ID (Figure 11) on mod-els ST423451W/WD. To change the SCSI ID, install jumpers onthe appropriate pins as shown in the illustration. Figure 11. Setting the SCSI ...
Page 43 - Other applicable jumper options; Other option jumpers are available as illustrated below.
Elite 23 Installation Guide, Rev. A 41 W/WD drives Other applicable jumper options Other option jumpers are available as illustrated below. Figure 14. Additional jumper options Immediate spinup (if the Start Command option jumper is disconnected)Spinup delay equal to the SCSI Bus IDmultiplied by 12 ...
Page 44 - All drives; LED indicator connections for all drive models
42 Elite 23 Installation Guide, Rev. A All drives Active, Ready, and Fault indicators The Active, Ready, and Fault LED indicator connections areshown below. Figure 15. LED indicator connections for all drive models J4A Reserved Active LED Connector Fault/Ready LED Connector Terminator Enabled (TE) A...
