1 9 2 6 D MICROPOLIS NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/FH Cylinders 2759| | | Capacity form/unform 2158/ 2550 MB Heads 15| | | Seek time / track 13.0/ 2.0 ms Sector/track | | | Controller SCSI2 DI/FAST Precompensation Cache/Buffer 512 KB SEGMENTED Landing Zone Data transfer rate 4.500 MB/S int Bytes/Sector 512 10.000 MB/S ext SYNC Recording method RLL operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 10 50 | -40 65 Power: sleep W Humidity % 10 90 | 10 90 standby 29.5 W Altitude km -0.061 3.048| -0.305 15.240 idle W Shock g 8 | 30 seek 31.0 W Rotation RPM 5400 read/write W Acoustic dBA 40 spin-up W ECC Bit 64 MTBF h 250000 Warranty Month Lift/Lock/Park YES Certificates ********************************************************************** L A Y O U T ********************************************************************** MICROPL. 1926 PRODUCT DESCRIPTION 110872 REV. A +---------------------------------------------------------+ | |XX | Component Side |XX J2 | No. 150072 Rev. A4 |XX | |1X | | | Slave SyncxxW3 RN4+|XX | Master SyncxxW4 |||XX | |||XX | ++|XX | |XX J1 | RN5+|XX | xxW5 |||XX | W6xxxW8 |||XX | ++|XX | +-+J11 | 1 | +-+LED Connector Frame Ground++W7 |XX J3 | ++ |XX +---------------------------------------------------------+ 1 +--------------------------------------+ | ++J4 | | ++ | | ++J5 | | ++ | | | | J2 J1 J3 | +..........-XXXXXXXXXXXXXXXXXX-XXXXXXXX+ +-Multi---1---Signal---------1--------1+ Power ********************************************************************** J U M P E R S ********************************************************************** MICROPL. 1926 PRODUCT DESCRIPTION 110872 REV. A Jumper Setting ============== x = Factory default J2 Multi-Function Connector ---------------------------- SCSI-1/SCSI-2 Option--------+ +---------Spindle Control Option | | +------ID2 Bus Parity Check Option+ | | | +---ID1 Remote LED--+ | | | | | ID0 +--+--+--+--++-++-++-+--++-++-++-+-++ +----- |23|21|19|17|15|13|11|09|07|05|03|01+-+ |24|22|20|18|16|14|12|10|08|06|04|02+-+ J1 ++-+--++-+--++-+--+--+--+--+--+--+--+ +------ Remote LED+ | | +5V | | Slave Sync Master Sync Note: Pins 2, 4, 6, 8, 10, 12, and 14 are tied to Ground. Pins: 09, 10, 17, 18, 19, 21, 22, 23 are RESERVED. Multi-Function Connector J2 Pin Assignments ------------------------------------------- +---+---------------+---+--------------+ |Pin| Signal Name |Pin|Signal Name | +---+---------------+---+--------------+ | 1 |ID0 | 2 |GROUND | +---+---------------+---+--------------+ | 3 |ID1 | 4 |GROUND | +---+---------------+---+--------------+ | 5 |ID2 | 6 |GROUND | +---+---------------+---+--------------+ | 7 |Spindle Control| 8 |GROUND | +---+---------------+---+--------------+ | 9 |RESERVED |10 |GROUND | +---+---------------+---+--------------+ |11 |SCSI-1/SCSI-2 |12 |GROUND | +---+---------------+---+--------------+ |13 |BUS Parity |14 |GROUND | +---+---------------+---+--------------+ |15 |Remote LED |16 |MASTER SYNC | +---+---------------+---+--------------+ |17 |RESERVED |18 |Not Connected | +---+---------------+---+--------------+ |19 |RESERVED |20 |Slave Sync | +---+---------------+---+--------------+ |21 |RESERVED |22 |RESERVED | +---+---------------+---+--------------+ |23 |RESERVED |24 |Remote LED +5V| +---+---------------+---+--------------+ J2 SCSI ID ----------- Up to eigth devices (the host and seven targets) can be attached to the SCSI bus. The 1926 drive has three ID jumpers - ID0, ID1, and ID2. In multiple-device systems, each drive must have its own unique ID. The three jumpers are used to assign one of the eight SCSI ID bits (0 through 7) to the drive. +----------+-----------------------+ | SCSI ID | Jumpers | | | ID2 | ID1 | ID0 | +----------+-------+-------+-------+ | 0 | OPEN | OPEN | OPEN | | 1 | OPEN | OPEN | CLOSED| | 2 | OPEN | CLOSED| OPEN | | 3 | OPEN | CLOSED| CLOSED| | 4 | CLOSED| OPEN | OPEN | | 5 | CLOSED| OPEN | CLOSED| | 6 | CLOSED| CLOSED| OPEN | | x 7 | CLOSED| CLOSED| CLOSED| +----------+-------+-------+-------+ Interface Terminator packs RN4 and RN5 provide proper termination for the interface lines. For a multiple-drive system, the terminator packs are installed in the last drive on the cable. J2 Spindle Control Option -------------------------- Pin 7-8 CLOSED The drive must wait for an interface START UNIT command to start the spindle motor. OPEN The drive automatically starts the spindle motor at power-on. (Factory default configuration) J2 SCSI-1/SCSI-2 Option ------------------------ x Pin 11-12 CLOSED The drive is in SCSI-2 mode. OPEN The drive is in SCSI-1 mode. This jumper works in conjunction with the Change Definition SCSI Command. When the jumper is omitted, the resultant SCSI mode will be the reserve of what the Change Definition Command had set. J2 Bus Parity Check Option --------------------------- Pin 13-14 CLOSED The drive neither generates nor detects parity. x OPEN The drive generates parity and enables parity detection. J2 Remote LED Option --------------------- A remote LED installed between pins 15 (base of LED) and 24 (Remote LED +5V) of J2 will provide the remote LED operation. J4/J5 Ground Connectors ------------------------ 3/16-inch spade lugs J4 and J5 are provided for grounding. System characteristics determine proper ground connection. W3/4 Spindle Synchronization Option ------------------------------------ Jumpers installed (CLOSED) at W3 and W4 provide termination for the Spindle Synchronization signals (Slave Sync and Master Sync respect- ively). The Rotational Position Locking field (MODE SELECT command, Page Code 04h) is used to specify spindle synchronization operation. Unsynchronized: If the drive is set to Unsynchronized (RPL = 00b), it ignores the SLAVE SYNC signal. Slave: If the drive is set to Slave (RPL = 01b), it does not generate the MASTER SYNC signal or the SLAVE SYNC signal but synchronizes its index to the SLAVE SYNC signal (J2, pin 20) supplied by an external source. Signal termination is placed on the SLAVE SYNC signal at the first and last drive in the chain only. Master: If the drive is set to Master (RPL = 10b), it generates the SLAVE SYNC output signal (J2, pin 20) for use directly by the slave drives. Signal termination is placed on the SLAVE SYNC signal at the first and last drive in the chain only. Master Control: If the drive is set to Master Control (RPL = 11b), it generates the MASTER SYNC signal (J2, pin 16). This output is used by the controller to generate the SLAVE SYNC signal (J2, pin 20) for the slaves. Signal termination is placed on the MASTER SYNC signal at the first and last drive in the chain only. Signal termination is placed on the SLAVE SYNC signal at the first and last drive in the chain only. W5/W6/W8 Bus Termination Power Option -------------------------------------- +-----------------------+------------------------------------+ | Jumpers | | | W6 | W8 | W5 | | +-------+-------+-------+------------------------------------+ | CLOSED| OPEN | OPEN |The drive provides terminator power | | | | |to its on-board terminators | | | | |(Factory default configuration) | +-------+-------+-------+------------------------------------+ | OPEN | CLOSED| OPEN |On-board term. PWR is provided by | | | | |host via interface cable J1, pin 26 | +-------+-------+-------+------------------------------------+ | CLOSED| OPEN | CLOSED|The drive provides terminator power | | | | |to its on-board terminators and | | | | |also to the SCSI bus via interface | | | | |cable J1, pin 26 (TERMPWR) | +-------+-------+-------+------------------------------------+ A jumper is installed at W6, at W8, or at W6 and W5 to select the source of terminator power (+5V) for the SCSI bus terminator packs on the Device Electronics board. W7 Frame Ground Option ----------------------- W7 CLOSED Frame ground is connected to logic ground OPEN Frame ground is not connected to logic ground (Factory default configuration) J3 DC Power and pin connector assignments ------------------------------------------- +------------+ pin 1 +12 V | 1 2 3 4 | pin 2 +12 V Return +------------+ pin 3 + 5 V Return pin 4 + 5 V ********************************************************************** I N S T A L L ********************************************************************** MICROPL. 1926 PRODUCT DESCRIPTION 110872 REV. A Notes on installation ===================== Drive mounting -------------- horizontally vertically +-----------------+ +--+ +--+ | | | +-----+ +-----+ | | | | | | | | | +-+-----------------+-+ | | | | | | +---------------------+ | | | | | | | | | | | | | | | | | | | +-----+ +-----+ | +--+ +--+ Dimensions and Mounting ----------------------- The 1926 drive uses industry-standard mounting techniques for 5 -inch full-height Winchester disk drives. The drive is designed such that the outer frame should be hard- mounted to the host equipment; no additional/external shock mounts should be used. Recommended orientation is vertical on either side, or horizontal with the Device Electronics board down; other mounting orientations may be used. No matter what mounting orientation is used, Micropolis specifies that the maximum HDA casting temperature not exceed 60*C (140*F). Mounting Screws --------------- 2 per side 6-32 UNC-2B 4 on bottom 6-32 UNC-2B Caution: The mounting screws must be selected so that they do not penetrate the bottom mounting holes by more than 0.20 inches or the side mounting holes by more than 0.156 inches. Screws that are too long will short to PCBA components and/or prevent operation of the shock mount system. SINGLE-ENDED Interface Electrical Characteristics ------------------------------------------------- Interface control and status signals are digital (open collector TTL) using industry-standard transmitters and receivers which provide a terminated, single-ended system. The assigned signals are terminated with 220 ohms to +2.85V (nominal). All signals use open-collector or three-state drivers. Single-ended drivers and receivers allow a maximum cable length of six meters (primarily for connection within a cabinet). Signal transmission requires a single 50-conductor cable. A characteristic impedance of 100 ( 10%) ohms is recommended for un- shielded flat or twisted pair ribbon cable. a. Input Characteristics Each of the drive's signal receivers has the following characteristics when measured at the interface connector. 1) Signal true = 0.0 VDC to 0.8 VDC 2) Maximum total input load = -0.4 milliamps at 0.5 VDC 3) Signal false = 2.0 VDC to 5.25 VDC 4) Minimum input hysteresis = 0.2 VDC b. Output Characteristics Each driven signal has the following characteristics when measured at the interface connector. 1) Signal assertion = 0.0 VDC to 0.5 VDC 2) Minimum driver output capability = 48 milliamps (sinking) at 0.5 VDC. 3) Signal negation = 2.5 VDC to 5.25 VDC c. Terminator Power (TERMPWR at Pin 26) Terminator Power has the following requirements: V(TERM) = 4.25 VDC to 5.25 VDC 900 milliamps minimum source drive capability, with 1.0 amp recommended current limiting (e.g., a fuse). 1.0-milliamp maximum bus loading (except for the purposes of providing power to an internal terminator). Keyed connectors are provided to prevent accidental grounding or misconnection of terminator power. Interface Terminator packs provides proper termination for the single-ended interface lines. For a multiple-drive system, the terminator pack is installed in the last drive on the cable. Signal Connector J1 ------------------- J1 is a 50-pin connector. The signals on J1 include the 8-bit SCSI bus and various control and handshaking lines. Recommended Cable: 3M Scotchflex 3365/50 or equivalent. Mating connector: 3M P/N 3425-3000 or equivalent. J2 Multi-Function Connector/Jumper Block ---------------------------------------- J2 is a 24-pin, multi-function connector/jumper block. This connector is used for device addressing and various other options. J3 DC Power Connector ---------------------- J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector. Both +5V and +12V are supplied to the drive via this connector. Mating Connector: AMP 1-480424-0 or equivalent Pins: AMP 350078-4 Suggested Wire Size: 18 AWG Ground Connectors J4 and J5 --------------------------- 3/16-inch spade lugs J4 and J5 are provided for grounding. Systems characteristics determine proper ground connection. Mating connector: AMP 60972-2 or equivalent. LED Connector J11 ----------------- Recommended mating Connector: Dupont 69305-002 or equivalent Pins: Dupont 77138-001 Suggeszed Wire Size: 26-30 AWG Multiple-Drive Systems ---------------------- Up to seven 1926 drives can be connected to a single host. Drive #1 +------HOST------+ +-----------------+ | +-----------+ +--+-SCSI-BUS-----+ J1 | | |Terminators| | | +------+ J3 J4/J5 | | +-----------+ | | | +--------+--------+ | | | | +------------------+ +----------------+ | | Drive #2 | | | +-----------------+ | +-------+------+ J1 | | | o------+ J3 J4/J5 | | | | +--------+--------+ | | | +------------------+ | | Drive #3 | | | +-----------------+ | +-------+------+ J1 | | | o------+ J3 J4/J5 | | | | +--------+--------+ | | | +------------------+ | | Drive #4 | | | +--------------+--+ | +-------+------+ J1 |T | | o------+ J3 J4/J5 +--+ | --DC-Voltages------+ +--------+--------+ | ---GROUND--------------------------+------------------+ T = TERMINATORS Terminators are installed ONLY in the last physical drive in the control chain. Connectors J4 and J5 are provided for grounding; system character- istics determine the proper ground connection. Adjustments and Maintenance --------------------------- 1926 drives requires no adjustments or periodic maintenance; additionally, no mechanical adjustments are required to prepare a system for handling or shipment. Field-Replacable Components --------------------------- The concept of repair by replacement of complete functional components is utilized in the 1926, resulting in an MTTR of less than 15 minutes. ********************************************************************** F E A T U R E S ********************************************************************** MICROPL. 1926 PRODUCT DESCRIPTION 110872 REV. A Description ----------- This Product Description describes the Micropolis 1926 single-ended high-performance, 5 -inch full-height Rigid Disk Drive. The 1926 is a reduced capacity version of the popular field-proven 1936 family of drives. The 1926 disk drives provide random-access, high-speed, data storage and meet the needs of diverse applications environment. The drives are compatible with the "ANSI CCS/SCSI-1" and "SCSI-2" versions of the industry-standard Small Computer System Interface (SCSI) specification. Some Features of the 1926 Drives -------------------------------- - The drive supports fully-programmable automatic retries, including the use of ECC. These features, together with defect mapping and automatic reallocation, afford the system a high degree of protection against the effects of hard errors. - Rugged dual-chassis construction suspends the HDA on shock/vibra- tion isolators to provide exceptional protection during shipment, system installation, and operation. - Positive media protection is achieved during spin down (due to a STOP UNIT command or power off) by automatically retracting and locking the positioner in a data-free landing zone. - Center Servo - with the servo head placed in the middle of the disk stack, the highest possible positioner accuracy is provided within a broad range of environments. - A sophisticated multi-segment read-ahead algorithm dramatically improves response time for many read operations. - Supports the disconnect/arbitrate/reconnect operation. - Loadable code provides for SCSI Firmware upgrades via the SCSI interface. The drive can electronically download SCSI Firmware via the SCSI interface. This eliminates the need to remove/install the EPROM IC, which reduces labor time and eliminates the risk of damage to the drive. - Performance is enhanced by low SCSI command overhead. Intelligent features such as read-ahead and sophisticated buffer management make maximum use of the 512K data buffer, with up to eight segments, which has full parity for data integrity. Media Defects ------------- Media defects are physical characteristics of the media which result in repetitive read errors when a functional drive is operated within specified operating conditions. At the time of manufacture, a media test system evaluates every drive and identifies each media defect location. The defective areas are identified by head address (HD), cylinder address (CYL), and number of bytes from Index (BFI). The list of manufacturer-found defects is stored on the drive in a reserved, write-protected area accessible by the SCSI controller. This list is known as the MDL (Manufacturers Defect List) or PList (Primary Defect List). A printed listing of the defects is also shipped with each drive. The entries it contains can be mapped out (reassigned) automatically at format control parameter bits. Seek Time --------- | 1926 | ----------------------------------+--------+ Track-to-Track read msec. typ. | 1.4 | write msec. typ. | 2.4 | Average msec. typ. | 13 | msec. max. | 26.5 | ----------------------------------+--------+ Recording Media --------------- The aluminium disks, each 130 millimeters (5 1/4 inches) in diameter, are mounted on the spindle assembly. The recording surface on each disk is a thin coating of magnetic material. Air Filtration System --------------------- The 1926 drives are designed to provide contamination control within the sealed HDA throughout the life of the drive with zero maintenance. Air within the HDA is continuously recirculated and filtered through a high efficiency filter. Air is ducted to and from the filter for maximum pressure recovery and filter efficiency. Air within the HDA may only enter the drive through a high-efficiency breather filter. Breaking -------- The heads contact a start/stop (landing zone) area of the disk surface which is not used for data storage when the disks are not spinning and during start and stop cycles. Dynamic braking is used to stop the spindle quickly.