Table of Contents
Advertisement
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hawk 2 Family:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST12400N/ND/NC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST11900N/ND/NC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual, Volume 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Advertisement
Table of Contents
Related Manuals for Seagate ST12400N
Summary of Contents for Seagate ST12400N
- Page 1 ............ST12400N/ND/NC .
- Page 3 ............ST12400N/ND/NC .
- Page 4 Other product names are registered trademarks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publica- tion may be reproduced in any form without written permission of Seagate Technology, Inc.
- Page 5 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. E _________________________________________________________________________________________ Revision status summary sheet Revision Authority Date Writer/Eng. Sheets Affected A Issue 9/27/93 D. Ashby v thru viii, 1 thru 71. PLD: 84283 94 Mar 07 v thru viii, 1 thru 71. (technical changes pages 46, 47, 52, 53 and 54.) PLD: 84224...
-
Page 6: Table Of Contents
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C ________________________________________________________________________________________ Table of contents Scope ............................1 Applicable standards and reference documentation ............... 2 Standards ........................2 Applicable reference documents ..................2 General description ........................3 Standards features ........................5 4.1. - Page 7 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ Table of contents Physical/electrical specifications ....................21 AC power requirements ....................21 DC power requirements ....................21 7.2.1 Conducted noise immunity ................22 7.2.2 Power sequencing ..................... 22 7.2.3 12 V - current profile ..................
- Page 8 Options ............................67 12.1 Front panel ........................67 12.2 Single unit shipping pack ....................67 13.0 Accessories ..........................68 13.1 Front panel kit ........................68 13.2 Installation manual ......................68 14.0 Technical support services ......................69 Seagate Peripheral Family ........................70...
-
Page 9: Scope
This specification describes the Seagate Technology, Inc. Hawk 2 Model ST12400 Disc Drive. This high capacity, high performance member of the Seagate 3.5 inch rigid disc family has a new HDA (Head/Disc Assembly) design having improvements over previous 3.5-inch Seagate models. It has an embedded SCSI controller. Performance information is given in Section 5. -
Page 10: Applicable Standards And Reference Documentation
Standards The Hawk 2 Family complies with Seagate standards as noted in the appropriate sections of this specification and the Seagate SCSI-2/SCSI-3 Interface Specification, P/N 77738479 (Vol. 2, Version 2). -
Page 11: General Description
2 Interface Specifications to the extent described in this product specification (Vol. 1), which defines the product performance characteristics of the Hawk 2 Family of drives, and the SCSI-2 Interface Product Manual P/N 77738479 (Vol. 2, Version 2) which describes the general interface characteristics of this and other families of Seagate 3.5- inch drives. - Page 12 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ ST12400N/ND ST12400NC Family PCB Family PCB Figure 3.0-1. Hawk 2 family drive...
-
Page 13: Standards Features
• Synchronous spindle capability • 256 K byte data buffer (Optional 1 MB available) • Permanently mounted terminators (for model ST12400N only), enabled by installation of a jumper plug. Performance • Programmable multi-segmentable cache buffer • 5411 RPM Spindle. Average latency = 5.54 ms •... -
Page 14: Unformatted And Formatted Capacities
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 some typical formatted capacities. Spare Sectors or Cylinders ST12400N/ND/NC ST11900N/ND/NC Reserved for reallocation 512[1]... -
Page 15: Installation
If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. Permanently installed terminators must be enabled on the drive for ST12400N models using a jumper plug (see Figure 10.1-1), For ST12400ND models, terminators must be installed external to the drive. -
Page 16: Performance Characteristics
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Performance characteristics Internal drive characteristics (transparent to user) ST12400N/ND/NC ST11900N/ND/NC Drive Capacity 2537 2003 MByte (UNF) Read/Write Heads Data (Max) Bytes/Track 50,945 50,945 Bytes (Avg) Bytes/Surface 131.3 131.3... -
Page 17: Format Drive Command Execution Time
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 5.2.2 Format drive command execution time (minutes) [1] ST12400N/ND/NC ST11900N/ND/NC Maximum (with verify) 45 Min. 37 Min Maximum (no verify) 31 Min. 27 Min. *[ ] All notes are listed in Section 5.3.1. -
Page 18: Generalized Performance Characteristics
Min. [4] 2.88 MByte/sec divided by (Interleave Factor) Avg. [4] 3.94 MByte/sec divided by (Interleave Factor) Max. [4] 4.6 Mbyte/sec divided by (Interleave Factor) SCSI Interface Data Transfer Rate (Asynchronous) [5] ST12400N/NC/ST11900N/NC ST12400ND/ST11900ND -Maximum Instantaneous ** 5.2 MBytes/sec 3.3 MBytes/sec -Maximum Average *** 3.1 MBytes/sec... -
Page 19: Notes For Sections 5.2 And 5.3
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ 5.3.1 Notes for sections 5.2 and 5.3. [1] Execution time measured from receipt of the last Byte of the Command Descriptor Block (CDB) to the re- quest for a Status Byte Transfer to the Initiator (excluding connect/disconnect). [2] Maximum times are specified over the worst case conditions of temperature, voltage margins and drive orientation. -
Page 20: Prefetch/Multi Segmented Cache Control
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ If the Motor Start Option is enabled the internal controller accepts the commands listed in the SCSI Interface Product Manual* less than 3 seconds after DC power has been applied. After the Motor Start Command has been received the drive becomes ready for normal operations within 25 seconds. -
Page 21: Prefetch Operation
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B ________________________________________________________________________________________ Case B - A Read command requests data, the first LB of which is not in any segment of the cache: 1. The drive fetches the requested LB’s from the disc and transfers them into a segment, and from there to the host in accordance with the disconnect/reconnect specification referred to in case A. -
Page 22: Caching Write Data
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. D _________________________________________________________________________________________ Caching write data Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored in one or more segments while the drive performs the write command. Write caching is enabled along with read caching. - Page 23 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Sync Interface REFIND + Master Sync Source Bottom side of PCB Spindle Control Host (or other drive) Drive 1 DLYIND+ SCSI Bus System Spindle Interface Control Drive 2 Spindle Control Drive n...
- Page 24 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ The servo/read-write LSI on the master drive provides the reference signal (REFIND+). It is a 90.18 Hz crystal generated signal. The signal is normally false/negated (nominal 0 V) and makes a transition to the true/asserted (nominal +5 V) level to indicate the reference position during the revolution period.
- Page 25 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ SCSI Interface Factors The Rotational Position Locking (RPL) field in byte 17 (bits 0 and 1) of the Rigid Disc Drive Geometry mode parameters page (page 04h) is used for enabling/disabling spindle synchronization mode*. If the target fails to achieve synchronization, it shall create a unit attention to all initiators.
-
Page 26: Reliability Specifications
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface tim- ings, power supply voltages, and environmental requirements. Less than 1 in 10 7 seeks Seek Errors Read Error Rates [1] Less than 1 sector in 10 14... -
Page 27: Write Errors
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 6.1.3 Write errors Write errors can occur as a result of media defects, environmental interference, or equipment malfunction. There- fore, write errors are not predictable as a function of the number of bits passed. If an unrecoverable write error occurs because of an equipment malfunction in the drive, the error is classified as a failure affecting MTBF. -
Page 28: Service Philosophy
6.2.7 Product Warranty Beginning on the date of shipment to customer and continuing for a period of 5 years, Seagate warrants that each product (including components and sub-assemblies) or spare part that fails to function properly under normal use due to defect in materials on workmanship or due to non conformance to the applicable specifications will be repaired or replaced, at Seagate’s option and at no charge to customer, if returned by customer at customer’s... -
Page 29: Physical/Electrical Specifications
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Physical/electrical specifications 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
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 7.2.1 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 connector. -
Page 31: Heat/Power Dissipation
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Note. All times and currents are typical. See Table 7.2-1 for maximum current requirements. Power Save Cut-in Current CH1 GND Current Channel 1 2 s .5 Amps Channel 2 2 s .5 Amps CH2 GND Seconds... -
Page 32: Temperature
Non-Operating -40° to 158°F (-40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This speci- fication assumes that the drive is packaged in the shipping container designed by Seagate for use with the drive. - Page 33 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. E _________________________________________________________________________________________ Single Ended I/O PCB Differential I/O PCB U2Ø U2Ø U1Ø U1Ø Bottom side of PCB. J1 is a single 80 pin connector on "NC" models. Shown is a 50 pin SCSI I/O connector and the 4 pin DC power connector.
-
Page 34: Relative Humidity
The drive as packaged in a single or multiple drive pack of gross weight 20 pounds (8.95 kg) or less by Seagate for general freight shipment shall withstand drop test from heights listed below against a concrete floor or equivalent. For additional details refer to specification 30190-001 (under 100 lbs) or 30191-001 (over 100 lbs). - Page 35 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B ________________________________________________________________________________________ Figure 7.4.4-1. Recommended mounting...
-
Page 36: Air Cleanliness
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 7.4.4.2 Vibration a. Operating The drive, as installed for normal operation, shall operate error free while subjected to continuous vibration not exceeding 5-22 Hz @ 0.040 inches (1.03 mm) displacement 22-400 Hz @ 1.0 g Vibration may be applied in the X, Y, or Z axis. -
Page 37: Mechanical Specifications
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Mechanical specifications The following nominal dimensions are exclusive of the decorative front panel accessory. Refer to Figure 7.6-1 for detailed mounting configuration dimensions. See section 7.6.3, Drive mounting. Height: 1.62 in 41.1... - Page 38 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Notes: 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 in-lb (.675 NM) max with minimum thread engagement of 0.12 in.
-
Page 39: Drive Orientation
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C __________________________________________________________________________________________ 7.6.1 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 40: Media Characteristics
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B ________________________________________________________________________________________ Media characteristics Media description The media used on the drive has a diameter of approximately 95 mm (approximately 3.7 inches). The aluminum substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection. -
Page 41: Defect And Error Management
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), 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 42: Option/Configuration Headers
See Table 11.6.3-1c from SCSI Bus Reserved for a list of pin numbers vs. signals for the 80 pin connector. Position A Not applicable to "NC" model drives. CATH Figure 10.1-1. ST12400N/ND/NC family drive ID and option select header. - Page 43 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Notes for Figure 10.1-1: [1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J5 and J6 are given below in left to right order of jumper position. The term “default” means as standard OEM units are config- ured when shipped from factory.
- Page 44 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ continued from previous page TP Position A This horizontally positioned jumper across the two TP positions nearest PCB edge, connects terminator power from SCSI bus I/O pin 26 to the drive’s internal terminators (for single-ended I/ O only).
-
Page 45: Synchronized Spindles Interface
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ 10.2 Synchronized spindles interface The Synchronized Spindles Interface (SSI) allows several drives operating from the same host to operate their spindles at a synchronized rotational rate. Details of the electrical and physical interfaces follow in paragraphs 10.2.1 and 10.2.1.2 and 10.2.1.3. -
Page 46: Grounding
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 10.2.1.3 Physical interface The dimensions of the connector (J6) mounted on the Main PCB to interconnect the drives is shown in Figure 10.2.1-2. It is a 12 pin, 6 jumper position gold header type connector. Only pins 5 and 6 are used for connecting the Reference Index signal cable, as shown in Figure 10.2.1-2. -
Page 47: Interface Requirement
This section partially describes the interface requirements as implemented on the drives. The major portion of the interface requirements/implementation is described in the Seagate SCSI Interface Product Manual, P/N 77738479. This section has tables that give the Hawk 2 Family drives version of the SCSI implementation de- scribed in the 77738479 document. -
Page 48: Scsi Interface Commands Supported
Hawk 2 Family drives can be changed back and forth between SCSI-1 and SCSI-2 modes using the Change Definition Command. OEM standard drives are shipped set to operate in SCSI-2 mode. Table 11.3-1. Commands supported by ST12400N/ND/NC family drives Com’d... - Page 49 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B ________________________________________________________________________________________ continued from previous page Com’d Supported by: Code SCSI-1 SCSI-2 Command Name Start unit/stop unit (spindle ceases rotating) Receive diagnostic results Supported diagnostics pages Translate page Send diagnostics page Supported diagnostics pages Translate page Read capacity...
-
Page 50: Inquiry Data
Four ASCII digits representing the firmware distribution diskette serial number. Bytes 18 through 24 will reflect model of drive. Shown here are hex values for ST12400N. Codes for ST11900N drive are 31, 31, 39, 30, 30, 4E. Codes for the “ND” model drive add 44, and codes for the “NC”... -
Page 51: Mode Sense Data
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B ________________________________________________________________________________________ 11.3.2 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 Changeable values. - Page 52 Default value. Standard drives are shipped configured this way. Not changeable via Mode Select command. Changeable bits; indicates current and saved values are changeable. Table 11.3.2-1. Mode sense data, ST12400N/ND/NC default values (SCSI-1 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23...
- Page 53 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ Table 11.3.2-2. Mode sense data, ST12400N/ND/NC default values (SCSI-2 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23...
- Page 54 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Table 11.3.2-3. Mode sense data, ST11900N/ND/NC default values (SCSI-1 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Mode Sense 63 00 00 08...
- Page 55 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ Table 11.3.2-4. Mode sense data, ST11900N/ND/NC default values (SCSI-2 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Mode 90 00 00 08 Sense...
-
Page 56: Scsi Bus Conditions And Miscellaneous Features Supported
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 11.4 SCSI Bus Conditions and Miscellaneous Features Supported Asynchronous SCSI bus conditions supported by the drive are listed in Table 11.4-1. These conditions cause the SCSI device to perform certain actions and can alter the phase sequence. Other miscellaneous operating fea- tures supported are also listed here. -
Page 57: Synchronous Data Transfer
80 pin connector. See Figure 11.6.3-1b and Table 11.6.3-1c. Details of the physical, electrical and logical characteristics are given in paragraphs following, while the SCSI operational aspects of Seagate drive interfaces are given in the Seagate SCSI Interface Product Manual, P/N 77738479. - Page 58 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B ________________________________________________________________________________________ Power +12V +12V ret + 5V ret + 5V DC Power Connector Pin 1 I/O Terminator Module ("N" models only) (not removable) Pin 1 SCSI I/O Connector Pin 1 End Figure 11.6-1a.
-
Page 59: Dc Cable And Connector
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C _________________________________________________________________________________________ 11.6.1 DC cable and connector The "N" and "ND" model drives receive DC power through a 4 pin connector mounted at the rear of the main PCB (see Figure 11.6-1). Recommended part numbers of the mating connector are listed below, but equivalent parts may be used (see Table 11.6-1). - Page 60 The "N" and "ND" model drives may be daisy-chained together or with other compatible SCSI devices. "N" and "ND" models use a common cable. Both ends of the cable must be terminated. The model ST12400N and ST12400NC drives implement single ended drivers and receivers. The model ST12400ND drive implements differential drivers and receivers.
-
Page 61: Connector Requirements
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C ________________________________________________________________________________________ Cable for “N” and “ND” model drives Only nonshielded cable connectors are applicable. A 50 conductor flat cable or 25 twisted pair cable shall be used. A minimum conductor size of 28 AWG should be used to minimize noise effects. Suggested nonshielded flat cable part numbers are: Flat cable - 35M-3365-50 Twisted pair - Spectra Twist in flat 455-248-50... - Page 62 Amp Japan P/N: 5-175474-9 11.6.3.3 J2 jumper plug part number Option select header connector J2 on the PCB (see Figure 10.1-1) uses an unusual type of jumperplug, so its part number is given here for reference: Molex 52747-0211 (Seagate P/N 77670952).
- Page 63 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B ________________________________________________________________________________________ .370 ± .010 (9.398) (15.24) (10.67) (5.08) .065 x 45° chamfer typ (1.65) Pin 1 .037 ref typ (.94) (6.60) .335 ± .010 (8.50) .100 (2.54) +.001 .025 .083 –.002 (.64) Square Contact...
- Page 64 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C __________________________________________________________________________________________ Side View 7.00 (.276) 1.52 (.060) 2.70 12.70 (.106) (.500) 1.32 (.052) Section X–X 57.87 (2.278) –0.15 + .000 – .006 0.15 –Y– Front View Pin 1 62.15 ±...
- Page 65 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ SCSI Device Host Adapter/Initiator * * * 1 thru 8 SCSI Devices Disc Drive or Disc Drive or Disc Drive or Other SCSI Other SCSI Other SCSI Device Device Device View B (T indicates termination required)
- Page 66 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ Table 11.6.3-1b. Differential cable pin assignments(Nonshielded connector) +SIGNAL NAME* PIN NUMBER -SIGNAL NAME* SHIELD GND GROUND +DB(0) -DB(0) +DB(1) -DB(1) +DB(2) -DB(2) +DB(3) -DB(3) +DB(4) -DB(4) +DB(5) -DB(5) +DB(6) -DB(6) +DB(7)
- Page 67 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ Table 11.6.3-1c. Single ended, 80 pin cable pin assignments (Non-shielded connector) Signal Pin number Signal Pin number +12 V 12 V GND +12 V 12 V GND +12 V 12 V GND +12 V 12 V GND...
-
Page 68: Electrical Description
Single ended drivers/receivers Typical single ended driver and receiver circuits for the ST12400N and ST12400NC are shown in Figure 11.6.4- 1. Terminator circuits shown (Note [1]) are to be enabled only when the disc drive is first or last in the daisy-chain. - Page 69 Cable Pair [1] Part of active terminator circuits. Permanently mounted LSI terminators enabled in the drive (ST12400N only) when it is first or last in the daisy-chain. See jumper header Figure 10.1-1 for terminator enabling jumper [2] ANSI SCSI compatible circuits [3] Total interface cable length should not exceed that specified in paragraph 11.6.2.2.1.
- Page 70 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 11.6.4.2 Differential drivers/receivers Typical differential driver and receiver circuits used by the model ST12400ND are shown in Figure 11.6.4-2. The drive has no provisions for terminator circuits on differential I/O drives. Differential signals All differential interface signals consist of two lines denoted +SIGNAL and -SIGNAL.
- Page 71 See section 11.6.4.2 for signal characteristics. I/O Line terminators. If SCSI device is a Seagate disc drive, terminators and a place to plug them in must be provided external to the drive by user, systems integrator or host equipment manufacturer where needed.
- Page 72 11.6.4.3 Terminator requirements Internal disc drive I/O termination (provided only in single ended I/O model ST12400N drives) consists of active circuits in an LSI module that is permanently mounted on the PCB. All single initiator/single target (nondaisy- chain) applications require that the Initiator and disc drive be terminated. Daisy-chain applications require that only the units at each end of the daisy-chain be terminated.
-
Page 73: Disc Drive Timing
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 11.7 Disc drive SCSI timing Table 11.7-1. Disc drive SCSI timing Waveform Waveform Description Symbol [1] Table [1] Typical Target Select Time (no Arbitration) <1 µs Target Select Time (with Arbitration) 4.5-1,2 2.34 µs Target Select to Command... - Page 74 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ continued from previous page Waveform Waveform Description Symbol [1] Table [1] Typical Asynchronous Data Transfer Characteristics: (continued) Next CDB Byte Access (Byte 2 of 10) T23.10.2 4.5-4 0.51 µs Next CDB Byte Access (Byte 3 of 10) T23.10.3 4.5-4...
-
Page 75: Options
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 12.0 Options All options are incorporated or packaged at the manufacturing facility. 12.1 Front panel The normal front panel available is black plastic. Other panel colors may be special ordered. Each panel has a single rectangular green LED indicator lens which, when glowing, indicates the drive is selected. -
Page 76: Accessories
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B _________________________________________________________________________________________ 13.0 Accessories All accessories are designed for implementation by the customer. 13.1 Front panel kit Same as 12.1 but includes all mounting hardware to support field installation. 13.2 Installation manual This manual (P/N 77738480) provides basic information on the care and handling of Winchester disc peripherals in general. -
Page 77: Technical Support Services
AM to 5:00 PM PST, Monday through Friday. SeaBOARD service: The Seagate Technical Support Bulletin Board System (BBS) is available 24 hours a day, 7 days a week. A modem is required to access this service. Model required. (300–9600 baud, 8-N-1). This is a toll call. -
Page 78: Seagate Peripheral Family
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. E _________________________________________________________________________________________ Seagate Peripheral Family Listed below are some of the SEAGATE Peripheral family members. For specific information on each member, refer to the appropriate documents. Model Model Product Unformatted... - Page 79 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. E _________________________________________________________________________________________ continued from previous page Model Model Product Unformatted Name Number Manual Interface Capacity (MB) ST3600 ST3500N 77738477(I) SCSI-2 ST3600N 77738477(I) SCSI-2 ST3610N/ND/NC 77738495(I) SCSI-2 635* ST3600A 77738485 AT (IDE) ST1480 ST1400N 77765458(I)
- Page 82 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 77767450, Rev. E (3/95) Printed in USA...
Need help?
Do you have a question about the ST12400N and is the answer not in the manual?
Questions and answers