Page 2 - Contents; Seagate
Contents Preface .................................................................. 1 Electrostatic discharge protection ........................... 1 Important safety information and precautions ......... 2 Wichtige Sicherheitshinweise ............................... 5 Technical support services .....
Page 3 - Preface; Barracuda 1 and 2 Product Manua l (part; Electrostatic discharge protection
ST11950 and ST12550 Installation Guide, Rev. D 1 Preface This manual contains information for users of theSeagate ® ST11950N/ND, ST11950W/WD, ST12550N/ND, and ST12550W/ WD Barracu da™ SCSI disc drives. Itprovides support serv ices, performance specifications,and initial setup information. Additional...
Page 4 - Important safety information and precautions
2 ST11950 and ST12550 Installation Guide, Rev. D • Ground yourself to the drive whenever the drive elec- tronics are or will be exposed. Connect yourself toground with a wrist strap (Seagate part number12263496). Connection may be made to any groundedmetal assembly. As a general rule, remember that ...
Page 7 - Wichtige Sicherheitshinweise
ST11950 and ST12550 Installation Guide, Rev. D 5 dards. Typical applications of these disc drives includecustomer packaging and subsystem design. Safetyagencies conditionally certify component parts, such asthe Barracuda disc drive, based on their final accept-ability in the end-use product. The sub...
Page 12 - Technical support services
10 ST11950 and ST12550 Installation Guide, Rev. D Technical support services Seagate Technology provides technical support litera-ture and diagnostic utilities to authorized distributors.Please contact your dealer for technical support andinstallation troubleshooting. Product technical supportis ava...
Page 14 - General description
12 ST11950 and ST12550 Installation Guide, Rev. D General description Barrac uda 1 and 2 SCSI disc drives are high- speed ,ra ndom -ac cess dig ital- data stor age devic es . TheST11950N/ND and ST12550N/ND drives are illustratedin Figure 1, and the ST11950W/WD and ST12550W/WDdrives are illustrated i...
Page 16 - Characteristics
14 ST11950 and ST12550 Installation Guide, Rev. D Characteristics ST11950N/ND ST11950W/WD Interface Fast SCSI-2 1 Fast & Wide SCSI-2 1 Multi-seg. cache 1,024 Kbytes 1,024 Kbytes (W)512 Kbytes (WD) Capacity Unformatted 2,030 Mbytes 2,030 Mbytes Formatted 2 1,690 Mbytes 1,690 Mbytes Recording Cyli...
Page 21 - continued from previous page; Initial setup information
ST11950 and ST12550 Installation Guide, Rev. D 19 continued from previous page 11 No terminator power. See Section 11.7.3.4 in the Prod- uct Manual. 12 All power-saving features are enabled. 13 Seeking is define d as a thir d-st roke seek at OD. Thecom man d is issue d every 20 msec. 14 Read track i...
Page 22 - Setting the SCSI ID jumpers
20 ST11950 and ST12550 Installation Guide, Rev. D Setting the SCSI ID jumpers Each device on the SCSI chain must have a unique SCSIID. The host system’s SCSI controller usually uses thehighest-numbered ID available (ID7 in non-wide sys-tems); therefore the lower-numbered SCSI IDs are nor-mally used ...
Page 25 - Terminating the drive; Figure 5. SCSI bus termination
ST11950 and ST12550 Installation Guide, Rev. D 23 Terminating the drive If you are installing the drive in a system that has otherSCSI devices installed, terminate only the end deviceson the SCSI chain. A SCSI “device” is any disc drive,scanner, tape backup unit, or other piece of hardwareconnected ...
Page 26 - Caution. Installing or removing terminator packs im-
24 ST11950 and ST12550 Installation Guide, Rev. D Refer to the appropriate section below for instructions interminating a drive. Caution. Installing or removing terminator packs im- properly can result in damage to the termina-tors or surrounding components. ST11950N and ST12550N drivesTo terminate ...
Page 27 - Note. Al l single - end ed termi nator s mus t be ANSI; SCS I -2 alt ernativ e 2 ac ti ve term i nators .
ST11950 and ST12550 Installation Guide, Rev. D 25 Note. Al l single - end ed termi nator s mus t be ANSI SCS I -2 alt ernativ e 2 ac ti ve term i nators . To install terminators, carefully insert the terminator’spins firmly into the socket’s holes. Note that pin 1 on thepack is identified by a dot, ...
Page 28 - Figure 7. Enabling termination
26 ST11950 and ST12550 Installation Guide, Rev. D Enable drive terminators. J4 EDT RES PAR Enable Drive Terminators (EDT) Disable drive terminators. J01 Pin 1 J4 MTR DMS WP RES Figure 7. Enabling termination on ST11950W and ST12550W drives ST11950ND/WD and ST12550ND/WD drivesST11950ND/WD and ST12550...
Page 29 - Terminator power; Figure 8. Setting terminator power jumpers
ST11950 and ST12550 Installation Guide, Rev. D 27 Terminator power Single-ended (N and W) drives have four valid configu-rations for terminator power (see Figure 8). Differential(ND and WD drives) must be configured with a jumperon J01 pins 1 and 3 only. * Terminator power from the drive. The drive ...
Page 30 - Changing other applicable jumper options; Figure 9a. Additional jumper options
28 ST11950 and ST12550 Installation Guide, Rev. D Changing other applicable jumper options Barracuda 1 and 2 drives are designed to be used in avariety of systems. Unique installations may require youto change one or more of the other jumpers to meetspecific system requirements; however, in most cas...
Page 31 - SCSI; Figure 9b. Additional jumper options
ST11950 and ST12550 Installation Guide, Rev. D 29 Enable parity check of SCSI bus data(default). J4 PAR MTR DMS Parity Check option (PAR) Disable parity check. Enable motor start. This makes the drive wait for the Start Unit commandfrom the host before starting thespindle motor. Motor Start option (...
Page 32 - Figure 10a. Additional jumper options
30 ST11950 and ST12550 Installation Guide, Rev. D Figures 10a and 10b provide the information necessaryto configure all W and WD drive jumpers not discussedelsewhere in this manual. DC Power Connector SCSI I/O Connector Pin 9 (top pin in this illustration) isnegative (cathode), Pin 10 (bottom pin) i...
Page 33 - Figure 10b. Additional jumper options
ST11950 and ST12550 Installation Guide, Rev. D 31 Figure 10b. Additional jumper options for ST11950W/WD and ST12550W/WD drives J4 RES RES PAR Reserved for factory use. Reserved (RES) Enable motor start. This makes the drive wait for the Start Unit command from the host before starting the spindle mo...
Page 34 - Figure 11. Spindle sync jumpers and connectors; Synchronizing spindles
Spindle sync reference index signal(REFSIG+). J4 SSC Spindle Sync Cable Connector(SSC). These pins are used toconnect a spindle sync cable. Ground (GND). SCSI Connector DC Power Connector J01 J4 Pin 1Pin 2 Figure 11. Spindle sync jumpers and connectors for ST11950N/ND and ST12550N/ND drives 32 ST119...
Page 35 - Figure 12. Spindle sync jumpers and connectors
ST11950 and ST12550 Installation Guide, Rev. D 33 For W- and WD-type drives, use pins 11 and 12 on theJ5 connector to attach the spindle sync cable. Pin 11provides the reference index signal (REFSIG + ) and pin 12 provides ground (GND). See Figure 12. DC Power Connector SCSI I/O Connector Spindle sy...
Page 36 - Figure 13. Spindle sync diagram
34 ST11950 and ST12550 Installation Guide, Rev. D Figure 13 illustrates a typical synchronized spindleconfiguration. After connecting each drive with spindle sync cables,you must designate a master spindle sync referencesource. This master source is normally a disc drivelocated on the same SCSI bus ...
Page 37 - Providing adequate cooling
ST11950 and ST12550 Installation Guide, Rev. D 35 Providing adequate cooling The e nclosure design must ensure adequate c oolingfor the drive. The maximum ambient temperature is50 o C. The drive’s product manual (83327780) describes howto evaluate the air-flow design. The evaluation co nsistsof ensu...
Page 38 - Kühlung des Systems
36 ST11950 and ST12550 Installation Guide, Rev. D Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichendeK ü h l u n g d e s L a u f w e r k e s g e w ä h r l e i s t e n . D i eUmgebungstemperatur darf maximal 50 o C betragen. Die Produkthandbuch Barracuda 1 und 2 (Dokument83327780) entha...
Page 40 - Mounting the drive and connecting cables; Mount the drive to the host system’s chassis using
38 ST11950 and ST12550 Installation Guide, Rev. D Mounting the drive and connecting cables Do not touch the connector pins or any components onthe control board without observing static-dischargeprecautions. Always handle the drive by the frame only. The drive may be mounted in any orientation (hori...
Page 46 - Setzen Sie das Gehäuseoberteil des Host-Systems
44 ST11950 and ST12550 Installation Guide, Rev. D Systemgehäuse nicht an die HDA/PCB-Erdunganschließen wollen, müssen Sie das Laufwerkauf nichtleitende Weise (galvanisch isoliert) imH o s t - S y s t e m e i n b a u e n . D i e d a r a u s u . U .resultierende verstärkte elektromagnetischeStrahlung ...
Page 47 - Boot the system from a system floppy disc or from a
ST11950 and ST12550 Installation Guide, Rev. D 45 Formatting the drive Warning. Formatting a drive erases all user data. Be sure that you understand this principle beforeformatting any hard disc drive. It is not necessary to format a drive which haspreviously been used to store data, unlessyour inte...
